scholarly journals IRRIGAÇÃO SUPLEMENTAR DO ALGODOEIRO COM ÁGUA RESIDUÁRIA TRATADA: ANÁLISES BIOMÉTRICAS E PRODUÇÃO DE BIOMASSA

Irriga ◽  
2020 ◽  
Vol 25 (4) ◽  
pp. 683-688
Author(s):  
Antonio Flavio Batista De Araujo ◽  
Claudivan Feitosa de Lacerda ◽  
Eduardo Santos Cavalcante ◽  
Jonnathan Richeds da Silva Sales ◽  
Raimundo Nonato Távora Costa ◽  
...  
Keyword(s):  
Gossypium Hirsutum ◽  
Block Design ◽  
Treated Wastewater ◽  
Severe Drought ◽  
Gossypium Hirsutum L ◽  
Stage Of Development ◽  
Supplementary Irrigation ◽  
Historical Series ◽  
Cotton Plants ◽  
E Mail

IRRIGAÇÃO SUPLEMENTAR DO ALGODOEIRO COM ÁGUA RESIDUÁRIA TRATADA: ANÁLISES BIOMÉTRICAS E PRODUÇÃO DE BIOMASSA     ANTONIO FLAVIO BATISTA DE ARAUJO1; CLAUDIVAN FEITOSA DE LACERDA2; EDUARDO SANTOS CAVALCANTE3; JONNATHAN RICHEDS DA SILVA SALES4; RAIMUNDO NONATO TÁVORA COSTA5 E FERNANDO BEZERRA LOPES6.   1Doutorando, Departamento de Engenharia Agrícola, UFC, Av. Mister Hull 2977, Bloco 804, Campus do Picí, 60450-760, Fortaleza, Ceará, Brasil, e-mail: [email protected].   2Professor Doutor, Departamento de Engenharia Agrícola, UFC, Av. Mister Hull 2977, Bloco 804, Campus do Picí, 60450-760, Fortaleza, Ceará, Brasil, e-mail: [email protected].  3Doutor, Departamento de Engenharia Agrícola, UFC, Av. Mister Hull 2977, Bloco 804, Campus do Picí, 60450-760, Fortaleza, Ceará, Brasil, e-mail: [email protected]. 4Mestrando Departamento de Engenharia Agrícola, UFC, Av. Mister Hull 2977, Bloco 804, Campus do Picí, 60450-760, Fortaleza, Ceará, Brasil, e-mail: jonnathanagro@gmail,com.  5Professor Doutor, Departamento de Engenharia Agrícola, U.F.C, Av. Mister Hull 2977, Bloco 804, Campus do Picí, 60450-760, Fortaleza, Ceará, Brasil, e-mail: [email protected]. 6Professor Doutor, Departamento de Engenharia Agrícola, U.F.C, Av. Mister Hull 2977, Bloco 804, Campus do Picí, 60450-760, Fortaleza, Ceará, Brasil, e-mail: [email protected].     1 RESUMO   O uso das águas residuárias tratadas em lagoas de estabilização na irrigação suplementar, desponta como uma estratégia para incrementar a produção agrícola de forma sustentável durante a estação das chuvas, eliminando, pelo menos parcialmente, as perdas associadas aos veranicos. Nesse contexto, o objetivo deste trabalho foi avaliar os impactos da irrigação suplementar do algodoeiro, sem e com adubação química com NPK, e simulando-se as condições de umidade do solo baseada em uma série histórica de dados de precipitação dos últimos 30 anos para a região do Baixo Jaguaribe-CE, considerando-se cenários normais, seca e seca severa. A pesquisa foi desenvolvida no município de Russas – CE, em uma área vizinha à lagoa de estabilização da CAGECE. O ensaio foi instalado em delineamento em blocos ao acaso, com arranjo dos tratamentos em parcelas subsubdivididas, com quatro repetições. Os resultados mostram impactos de cenários hídricos e da suplementação sobre a maioria das variáveis de crescimento das plantas de algodoeiro. A irrigação suplementar com águas residuárias incrementa a produção de biomassa e o vigor das plantas de algodão durante a fase inicial de desenvolvimento, independente da presença ou ausência da adubação com NPK. Esses efeitos foram significativos especialmente nos cenários de seca e seca severa.   Palavras-chave: Gossypium hirsutum L, reuso de água, Irrigação.     ARAUJO, A. F. B.; LACERDA, C. F.; CAVALCANTE, E. S.; SALES, J. R. S.; COSTA, R. N. T.; LOPES, F. B. SUPPLEMENTAL IRRIGATION OF COTTON WITH TREATED WASTEWATER: BIOMETRIC ANALYSIS AND BIOMASS PRODUCTION     2 ABSTRACT   The use of treated wastewater in stabilization ponds for supplementary irrigation emerges as a strategy to increase agricultural production sustainably during the rainy season, eliminating, at least partially, the losses associated with summer. In this context, this work evaluated the impacts of supplementary cotton irrigation, without and with chemical fertilization with NPK, on soil moisture conditions based on a historical series of precipitation data for the last 30 years for the region of Baixo Jaguaribe-CE, considering normal scenarios, drought and severe drought. The research was conducted in the municipality of Russas - CE, in an area adjacent to the CAGECE stabilization pond. The trial was installed in a randomized block design, with the treatments arranged in sub-divided plots, with four replications. The results show impacts of water scenarios and supplementation on most growth variables of cotton plants. Supplementary irrigation with wastewater increases the production of biomass and the vigor of cotton plants during the initial stage of development, regardless of the presence or absence of NPK fertilization. These effects were significant, especially in drought and severe drought scenarios.   Keywords: Gossypium hirsutum L, wastewater, irrigation.

scholarly journals INFLUÊNCIA DA IRRIGAÇÃO SUPLEMENTAR COM ÁGUAS RESIDUÁRIAS SOBRE AS TROCAS GASOSAS FOLIARES DO ALGODOEIRO

Irriga ◽  
2020 ◽  
Vol 25 (4) ◽  
pp. 677-682
Author(s):  
Adriana Cruz de Oliveira ◽  
Antonio Flavio Batista de Araujo ◽  
Claudivan Feitosa de Lacerda ◽  
Juvenaldo Florentino Canjá ◽  
Luciana Luzia Pinho ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Gossypium Hirsutum ◽  
Leaf Gas Exchange ◽  
Leaf Temperature ◽  
Treated Wastewater ◽  
Cotton Leaf ◽  
Severe Drought ◽  
Gossypium Hirsutum L ◽  
Supplementary Irrigation ◽  
E Mail

INFLUÊNCIA DA IRRIGAÇÃO SUPLEMENTAR COM ÁGUAS RESIDUÁRIAS SOBRE AS TROCAS GASOSAS FOLIARES DO ALGODOEIRO   ADRIANA CRUZ DE OLIVEIRA1; ANTONIO FLAVIO BATISTA DE ARAUJO2; CLAUDIVAN FEITOSA DE LACERDA3; JUVENALDO FLORENTINO CANJÁ4; LUCIANA LUZIA PINHO5 E NAARA IORRANA GOMES SOUSA6     1 Mestranda no Programa de Pós-Graduação em Engenharia Agrícola, Departamento de Engenharia Agrícola, Universidade Federal do Ceará-UFC, Av. Mister Hull, s/n -Pici, Centro de Ciências Agrárias, Bloco 804, CEP: 60455-760, Fortaleza-CE, Brasil. E-mail: [email protected] 2 Doutorando no Programa de Pós-Graduação em Engenharia Agrícola, Departamento de Engenharia Agrícola, Universidade Federal do Ceará-UFC, Av. Mister Hull, s/n -Pici, Centro de Ciências Agrárias, Bloco 804, CEP: 60455-760, Fortaleza-CE, Brasil. E-mail: [email protected] 3 Professor Titular do Departamento de Engenharia Agrícola, Universidade Federal do Ceará-UFC, Av. Mister Hull, s/n -Pici, Centro de Ciências Agrárias, Bloco 804, CEP: 60455-760, Fortaleza-CE, Brasil. E-mail: [email protected] 4Mestrando no Programa de Pós-Graduação em Engenharia Agrícola, Departamento de Engenharia Agrícola, Universidade Federal do Ceará-UFC, Av. Mister Hull, s/n -Pici, Centro de Ciências Agrárias, Bloco 804, CEP: 60455-760, Fortaleza-CE, Brasil. E-mail: [email protected] 5 Mestranda no Programa de Pós-Graduação em Engenharia Agrícola, Departamento de Engenharia Agrícola, Universidade Federal do Ceará-UFC, Av. Mister Hull, s/n -Pici, Centro de Ciências Agrárias, Bloco 804, CEP: 60455-760, Fortaleza-CE, Brasil. E-mail: [email protected] 6 Mestranda no Programa de Pós-Graduação em Engenharia Agrícola, Departamento de Engenharia Agrícola, Universidade Federal do Ceará-UFC, Av. Mister Hull, s/n -Pici, Centro de Ciências Agrárias, Bloco 804, CEP: 60455-760, Fortaleza-CE, Brasil. E-mail: [email protected]     1 RESUMO   O uso de águas residuárias na irrigação tem crescido como suplementação para driblar a escassez hídrica. Contudo, pouco se sabe sobre as respostas das culturas sobre sua aplicação. Assim, objetivou-se avaliar os impactos da irrigação suplementar com águas residuárias tratadas sobre as trocas gasosas do algodoeiro (Gossypium hirsutum L), simulando-se cenários hídricos considerados normais, seca e seca severa, na presença e ausência de NPK. O experimento foi conduzido no município de Russas – CE, em área vizinha à lagoa de estabilização da CAGECE – Companhia de Água e Esgoto do Estado do Ceará, em DBC, no esquema de parcelas subsubdivididas, com quatro blocos. As parcelas foram cenários hídricos (normal, seca e seca severa); a subparcela foi a suplementação ou não com água residuária tratada nos veranicos simulados; a subsubparcela foi a aplicação ou não de NPK. A cultivar utilizada foi BR 433. Aos 25 dias após a semeadura foram analisadas fotossíntese, transpiração, concentração interna de CO2 e temperatura foliar. Os cenários de seca e seca severa apresentaram pequeno impacto sobre as trocas gasosas foliares do algodoeiro. Entretanto, a irrigação suplementar reduziu a temperatura foliar e atenuou os efeitos do cenário de seca sobre a fotossíntese, independente da aplicação ou não de NPK.   Palavras-chave: Gossypium hirsutum L, Reúso de água, Seca.         OLIVEIRA, A. C. de; ARAUJO, A. F. B. de; LACERDA, C. F. de; CANJÁ, J. F.; PINHO, L. L.; SOUSA, N. I. G. INFLUENCE OF SUPPLEMENTAL IRRIGATION WITH WASTEWATER ON COTTON LEAF GAS EXCHANGE     2 ABSTRACT   The use of wastewater in irrigation has grown as a supplement to circumvent water scarcity. However, little is known about the responses of cultures to its application. Thus, the objective was to evaluate the impacts of supplementary irrigation with treated wastewater on gas exchange of cotton (Gossypium hirsutum L), simulating water scenarios considered normal, drought and severe drought, in the presence and absence of NPK. The experiment was conducted in the municipality of Russas - CE, in an area next to the stabilization pond of CAGECE - Companhia de Agua e Esgoto do Estado do Ceará, in DBC, in the subdivided plot scheme, with four blocks. The plots were water scenarios (normal, drought and severe drought); the subplot was supplemented or not with wastewater treated in the simulated summer days; the sub-installment was the application or not of NPK. The cultivar used was BR 433. At 25 days after sowing, photosynthesis, transpiration, internal CO2 concentration and leaf temperature were analyzed. The drought and severe drought scenarios had little impact on the cotton leaf gas exchange. However, supplementary irrigation reduced leaf temperature and attenuated the effects of drought scenario on photosynthesis, whether or not NPK was applied.   Keywords: Gossypium hirsutum L, Water reuse, Drought.

scholarly journals Attack of Potyphagotarsonemus tatus on cotton treated with growth retardants

1981 ◽  
Vol 38 (1) ◽  
pp. 121-126
Author(s):  
Luiz Mauro Barbosa ◽  
Paulo R.C. Castro
Keyword(s):  
Gossypium Hirsutum ◽  
Effective Control ◽  
Trimethylammonium Chloride ◽  
Growth Retardants ◽  
Gossypium Hirsutum L ◽  
Cotton Plants ◽  
Broad Mite

The effects of growth retardants on infestation by Potyphagotarsonemus tatus (broad mite) on cotton (Gossypium hirsutum L. cv. IAC-17) plants was studied. Cotton plants were sprayed with (2-ch1oroethy1) trimethylammonium chloride (CCC) 250, 350 and 450 ppm, and with 1,1-dimethyl-piperidinium chloride (Pix) at concentrations of 84, 167 and 250 ppm. Growth retardants did not give effective control of Potyphagotarsone mus tatus but application of Pix 167 ppm showed a tendency to reduce mite attack.

scholarly journals Respon Pemberian Paclobutrazol pada Beberapa Varietas Kapas (Gossypium hirsutum L.) di Lahan Sawah Sesudah Padi

2016 ◽  
Vol 3 (1) ◽  
pp. 30
Author(s):  
Budi Santoso ◽  
Fitriningdyah Tri Kadarwati
Keyword(s):  
Gossypium Hirsutum ◽  
Block Design ◽  
Natural Fibre ◽  
Raw Material ◽  
Paddy Fields ◽  
Cotton Production ◽  
Gossypium Hirsutum L ◽  
Marginal Lands ◽  
Productivity Level ◽  
Randomized Block Design

<p>Kapas (Gossypium hirsutum L.) merupakan penghasil serat alam yang digunakan untuk bahan baku tekstil. Pengembangan kapas diarahkan ke lahan-lahan marginal, walaupun sebagian ada yang ditanam pada sawah sesudah padi. Tingkat produktivitas serat kapas, saat ini masih rendah sekitar 0,8 sampai dengan 1 ton per hektar. Usaha peningkatan produksi kapas antara lain dengan pemberian zat stimulan (paclobutrazol), teruta-ma untuk memacu pertumbuhan vegetatif dan generatif seperti tinggi tanaman, jumlah cabang, jumlah bu-nga, dan jumlah buah. Kedua komponen tersebut menjadi penentu hasil serat. Paclobutrazol adalah zat stimu-lan bagi tanaman. Penelitian dilaksanakan di Kebun Percobaan Sumberrejo, Bojonegoro pada bulan Mei sam-pai dengan Oktober 2010, pada lahan sawah sesudah padi. Perlakuan disusun secara faktorial dengan meng-gunakan rancangan acak kelompok yang diulang sebanyak empat kali. Sebagai faktor pertama adalah 4 varietas kapas yang terdiri atas 1) Kanesia 8, 2) Kanesia 13, 3) Kanesia 14, dan 4) Kanesia 15. Faktor kedua adalah pemberian paclobutrazol melalui penyemprotan pada tanaman dengan dosis: a) 0; b) 1,50 l/ha diberikan sekali pada umur 60 hari; dan c) 1,50 l/ha diberikan dua kali umur 60 hari dan 75 hari. Hasil penelitian menunjukkan bahwa kapas varietas Kanesia 8 dan 13 yang ditanam di lahan sawah sesudah padi mempunyai pertumbuhan vegetatif dan generatif optimal, kemudian disusul dengan Kanesia 13, Kanesia 14, dan Ka-nesia 15. Paclobutrazol yang disemprotkan pada tanaman kapas, tidak berpengaruh nyata terhadap pertumbuhan baik vegetatif maupun generatif. Hasil kapas berbiji untuk varietas kapas Kanesia 8 dan Kanesia 13 sama, masing-masing sebesar 1.643 kg/ha dan 1.686 kg/ha.</p><p> </p><p>Cotton is a natural fibre crop for some textile raw material. The development of cotton is directed mainly to marginal lands, although few of it is planted in paddy fields after rice harvested. The productivity level of cotton fibre, is still low, about 0.8 to 1 ton per hectare. Effort to increase cotton production is done through the application of growth regulator aiming at enhancing to the growth of plant height, number of branches, number of flower, and boll. These components are fibre determinans. Research conducted at Sumberrejo Ex-perimental Garden, Bojonegoro from May to October 2010, in paddy fields after rice harvested. Factorial treat-ment arranged using randomized block design repeated four times. The first factor consisting of four cotton varieties: 1) Kanesia 8, 2) Kanesia 13, 3) Kanesia 14, and 4) Kanesia 15. The second factor is application of pa-clobutrazol by spraying the plants with usage of: a) 0, b) 1.50 l/ha given once at age 60 days, and c) 1.50 l/ ha given twice at the age of 60 days and 75 days. The research showed that Kanesia 8 and Kanesia 13 varie-ties gave optimum vegetative and generative growth followed with Kanesia 13, Kanesia 14, and Kanesia 15. Paclobutrazol did not contribute significant effect on the growth of both vegetative and generative of cotton. The productivity of seed cotton of Kanesia 8 and Kanesia 13, 1,643 kg/ha and 1,686 kg/ha, respectively.</p>

scholarly journals Aplikasi Teknologi Seed Coated dan Seed Delinted pada Benih Kapas (Gossypium hirsutum L.)

2019 ◽  
Vol 11 (1) ◽  
pp. 16
Author(s):  
Taufiq Hidayat RS ◽  
Nurindah Nurindah ◽  
Anik Herawati
Keyword(s):  
Gossypium Hirsutum ◽  
Seed Quality ◽  
Block Design ◽  
Seed Viability ◽  
Environmentally Friendly ◽  
Maximum Growth ◽  
Seed Coating ◽  
Seed Treatments ◽  
Gossypium Hirsutum L ◽  
Arabic Gum

<p><em>Seed coated</em> merupakan teknologi pelapisan benih dengan bahan tertentu untuk mempertahankan mutu benih dan membuat bentuk benih lebih teratur. Prosesing benih kapas saat ini masih menggunakan bahan kimia seperti asam sulfat (<em>seed delinted</em>) untuk menghilangkan kabu-kabu (<em>linter</em>) yang masih menempel pada biji setelah proses pemisahan serat dan biji. <em>Seed delinted</em> memungkinkan terjadinya kerusakan kulit hingga lembaga biji dan dapat menimbulkan masalah lingkungan dari limbah yang dihasilkan dalam proses tersebut. Penelitian ini bertujuan untuk menguji pengaruh perlakuan benih pada tiga jenis varietas terhadap viabilitas benih kapas. Penelitian ini menggunakan Rancangan Faktorial dalam RAK. Faktor Pertama terdiri atas beberapa perlakuan benih yaitu benih berkabu, benih <em>delinted</em>,<em> coated</em> dengan tapioka dan kaolin serta <em>coated </em>dengan<em> arabic gum</em>. Sedangkan, faktor kedua terdiri atas varietas kapas yaitu Kanesia 10, Kanesia 18 dan Kanesia 19. Hasil penelitian menunjukkan bahwa interaksi antara perlakuan benih dengan varietas kapas berpengaruh nyata untuk parameter panjang radikula dan menghasilkan koefesien keragaman mencapai 9.85%. Perlakuan benih <em>coated</em> dengan bahan <em>arabic gum</em> menunjukkan hasil yang terbaik untuk semua parameter pengamatan. Sedangkan, varietas Kanesia 10 menunjukkan persentase keserempakan tumbuh, persentase daya berkecambah, dan persentase potensi tumbuh maksimum terbaik masing-masing 92.25%, 96.25%, dan 98.00%. Perlakuan benih dengan teknologi <em>seed coated</em> menggunakan <em>arabic gum</em> pada Varietas Kanesia 10 dapat menunjukkan persentase viabilitas benih kapas terbaik.</p><p> </p><p><strong>Effect of Seed Coating on the Seeds Viability of Three Cotton Varieties ( Gossypium hirsutum L.) </strong></p><p><br />Seed coating technology with certain materials is objected to maintain seed quality and to make seed shapes more regular. Currently, cotton seeds processing is using chemicals such as sulfuric acid (acid seed delinted) to remove the linter which is still attached to the seeds after the separation of fibers and seeds. Acid seed delinting could causing damage on the seed skin as well as to the seed embryo and also cause environmental problems from the waste produced in the process. Seed coated technology has the prospect to be applied in the process of cotton seeding, so the process becomes environmentally friendly. This study aims to evaluate the effect of seed coating treatment on three cotton varieties on the seed viability. This study uses Randomized Block Design Factorial. The first factor consisted of four seed treatments namely fuzzy seed (control), seed delinted, seed coated with tapioca and kaolin and seed coated with arabic gum. The second factor were cotton varieties namely Kanesia 10, Kanesia 18, and Kanesia 19. The results showed that the interaction between seed treatments with cotton varieties significantly affected the radicular length parameters and produced a coefficient of varians 9.85%. Seed coated with arabic gum showed the best results for all observation parameters. Kanesia 10 showed the best of growing simultaneity, germination, and the potential maximum growth by 92%, 96%, and 98%, recpectively. The cotton cotton seed coated with arabic gum is prospective to be applied in the cotton seeding process as an alternative to the acid delinting technique that is not environmentally friendly. </p>

Potential Impacts of Translocation of Neonicotinoid Insecticides to Cotton (Gossypium hirsutum (Malvales: Malvaceae)) Extrafloral Nectar on Parasitoids

2019 ◽  
Vol 49 (1) ◽  
pp. 159-168
Author(s):  
Asher G Jones ◽  
Kelli Hoover ◽  
Kirsten Pearsons ◽  
John F Tooker ◽  
Gary W Felton
Keyword(s):  
Gossypium Hirsutum ◽  
Food Resource ◽  
Mechanical Damage ◽  
Extrafloral Nectar ◽  
Parasitoid Wasps ◽  
Cotesia Marginiventris ◽  
Gossypium Hirsutum L ◽  
Wide Range ◽  
Cotton Plants ◽  
Route Of Exposure

Abstract Neonicotinoid seed treatments are frequently used in cotton (Gossypium hirsutum L. [Malvales: Malvaceae]) production to provide protection against early-season herbivory. However, there is little known about how these applications affect extrafloral nectar (EFN), an important food resource for arthropod natural enemies. Using enzyme-linked immunosorbent assays, we found that neonicotinoids were translocated to the EFN of clothianidin- and imidacloprid-treated, greenhouse-grown cotton plants at concentrations of 77.3 ± 17.3 and 122.6 ± 11.5 ppb, respectively. We did not find differences in the quantity of EFN produced by neonicotinoid-treated cotton plants compared to untreated controls, either constitutively or after mechanical damage. Metabolomic analysis of sugars and amino acids from treated and untreated plants did not detect differences in overall composition of EFN. In bioassays, female Cotesia marginiventris (Cresson) (Hymenoptera: Braconidae) parasitoid wasps that fed on EFN from untreated, clothianidin-treated, or imidacloprid-treated plants demonstrated no difference in mortality or parasitization success. We also conducted acute toxicity assays for C. marginiventris fed on honey spiked with clothianidin and imidacloprid and established LC50 values for male and female wasps. Although LC50 values were substantially higher than neonicotinoid concentrations detected in EFN, caution should be used when translating these results to the field where other stressors could alter the effects of neonicotinoids. Moreover, there are a wide range of possible sublethal impacts of neonicotinoids, none of which were explored here. Our results suggest that EFN is a potential route of exposure of neonicotinoids to beneficial insects and that further field-based studies are warranted.

Intragenome distribution of 5-methylcytosine in DNA of healthy and wilt-infected cotton plants (Gossypium hirsutum L.)

1975 ◽  
Vol 2 (1) ◽  
pp. 59-63 ◽  
Author(s):  
Vilgeny A. Guseinov ◽  
Gleb I. Kiryanov ◽  
Boris F. Vanyushin
Keyword(s):  
Gossypium Hirsutum ◽  
Gossypium Hirsutum L ◽  
Cotton Plants

scholarly journals Potassium fertilization and irrigation with treated wastewater on gas exchange of colored cotton

2018 ◽  
Vol 22 (11) ◽  
pp. 741-746 ◽  
Author(s):  
Breno L. de C. Lima ◽  
Ênio F. de F. e Silva ◽  
Hugo R. B. Santos ◽  
Edivan R. de Souza
Keyword(s):  
Gas Exchange ◽  
Abiotic Factors ◽  
Block Design ◽  
Intercellular Co2 Concentration ◽  
Domestic Wastewater ◽  
Treated Wastewater ◽  
Potassium Fertilization ◽  
Cotton Plants ◽  
Colored Cotton ◽  
Naturally Colored Cotton

ABSTRACT The use of treated domestic wastewater in agriculture is promising because it contains essential nutrients for crops, especially for cotton plants. Information on leaf gas exchanges helps to understand the responses of plants to different water and nutrient managements, since they directly affect physiological processes. Thus, the objective of this study was to evaluate the effect of potassium fertilization and irrigation with treated wastewater on the gas exchange of naturally colored cotton plants grown in the semi-arid region of the state of Pernambuco, Brazil, providing a reference for evaluations of responses of cotton plants to abiotic factors. The experiment was conducted in a randomized block design, in a 5 × 5 factorial arrangement, with four replications. The treatments consisted of five potassium rates (0, 50, 100, 150, and 200% of the recommended rate for the crop) and five irrigation depths (50, 75, 100, 125, and 150% of the evapotranspiration of the crop). The highest stomatal conductance, transpiration, net assimilation rate, intercellular CO2 concentration, and carboxylation efficiency were found in irrigated plants with 110, 99, 117, 150, and 113% of ETc, combined with the potassium rates of 96, 113, 97, 100, and 100% of the recommendation rate for the crop, respectively. The increase in irrigation depths increased the diffusion of CO2 of the plants. The highest instantaneous water-use efficiency was found with the irrigation of 150% of ETc without potassium fertilization. According to the interaction between irrigation depths and potassium rates, the most efficient potassium rate for naturally colored cotton depends on the irrigation depth applied.

scholarly journals ESTRATÉGIAS DE MANEJO DO DÉFICIT HÍDRICO EM FASES FENOLÓGICAS DO ALGODOEIRO COLORIDO

Irriga ◽  
2020 ◽  
Vol 25 (4) ◽  
pp. 656-662
Author(s):  
Lauriane Almeida dos Anjos Soares ◽  
KAROLINE MARIA MENDES DIAS ◽  
HEMILE MACHADO NASCIMENTO ◽  
GEOVANI SOARES DE LIMA ◽  
KELDER JOSÉ ALVES DE OLIVEIRA ◽  
...  
Keyword(s):  
Gossypium Hirsutum ◽  
Water Deficit ◽  
Irrigated Agriculture ◽  
Limiting Factor ◽  
Gossypium Hirsutum L ◽  
Root Shoot Ratio ◽  
Colored Cotton ◽  
Cotton Genotypes ◽  
E Mail ◽  
Phenological Phases

ESTRATÉGIAS DE MANEJO DO DÉFICIT HÍDRICO EM FASES FENOLÓGICAS DO ALGODOEIRO COLORIDO     LAURIANE ALMEIDA DOS ANJOS SOARES1; KAROLINE MARIA MENDES DIAS2; HEMILE MACHADO NASCIMENTO3; GEOVANI SOARES DE LIMA4; KELDER JOSÉ ALVES DE OLIVEIRA5 E SAULO SOARES DA SILVA6   1 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Rua Jario Vieira Feitosa, 1770, Bairro dos Pereiros, Pombal, PB, Brasil. E-mail: [email protected] 2 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Rua Jario Vieira Feitosa, 1770, Bairro dos Pereiros, Pombal, PB, Brasil. E-mail: [email protected]. 3 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Rua Jario Vieira Feitosa, 1770, Bairro dos Pereiros, Pombal, PB, Brasil. E-mail: [email protected] 4 Unidade Acadêmica de Engenharia Agrícola, Universidade Federal de Campina Grande, UFCG, Rua Aprígio Veloso, 882 -Universitário, Campina Grande, PB, Brasil. E-mail: [email protected] 5 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Rua Jario Vieira Feitosa, 1770, Bairro dos Pereiros, Pombal, PB, Brasil. E-mail: [email protected] 6 Unidade Acadêmica de Engenharia Agrícola, Universidade Federal de Campina Grande, UFCG, Rua Aprígio Veloso, 882 -Universitário, Campina Grande, PB, Brasil. E-mail: [email protected]     1 RESUMO   A escassez hídrica é um fator limitante para a agricultura irrigada, principalmente em algumas fases do algodoeiro, afetando os processos fisiológicos e consequentemente a produtividade. Neste contexto, objetivou-se com este trabalho avaliar a fitomassa e os componentes de produção de genótipos de algodoeiro colorido sob déficit hídrico nas diferentes fases de fenológicas da planta. As plantas foram conduzidas em lisímetros sob condições de campo, no Centro de Ciências e Tecnologia Agroalimentar pertencente à Universidade Federal de Campina Grande, na cidade de Pombal-PB. O delineamento utilizado foi em blocos ao acaso em esquema fatorial 3 x 3, sendo três genótipos de algodão de fibra colorida (BRS Rubi, BRS Topázio e BRS Safira) irrigados sob déficit hídrico durante as três fases de desenvolvimento da cultura (vegetativa, floração e frutificação). A relação raiz/parte aérea é mais sensível aos efeitos do déficit hídrico na fase de floração e formação dos capulhos. Dentre os genótipos o BRS Topázio é o mais tolerante ao déficit hídrico (40% da ETr) durante a fase vegetativa para o número de sementes totais. O déficit hídrico na fase de frutificação do algodoeiro colorido pode ser utilizado no cultivo do algodoeiro com as menores perdas no peso de 100 sementes.   Palavras-chave: Gossypium hirsutum L., fitomassa, produção     SOARES, L. A. dos A.; DIAS, K. M. M.; NASCIMENTO, H. M.; LIMA, G. S. de OLIVEIRA, K. J. A. de; SILVA, S. S. da STRATEGIES FOR THE MANAGEMENT OF WATER DEFICIT IN PHENOLOGICAL PHASES OF COLORED COTTON   2 ABSTRACT   Water scarcity is a limiting factor for irrigated agriculture, mainly in some phases of cotton, affecting physiological processes and consequently productivity. In this context, this work aimed to evaluate the phytomass and production components of colored cotton genotypes under water deficit in different phenological phases of the plant. The plants were conducted in lysimeters under field conditions, at the Center for Science and Agrifood Technology belonging to the Federal University of Campina Grande, in the city of Pombal-PB. The design used was in a randomized block in a 3 x 3 factorial scheme, with three colored fiber cotton genotypes (BRS Rubi, BRS Topázio and BRS Safira) irrigated under water deficit during the three stages of crop development (vegetative, flowering and fruiting). The root/shoot ratio is more sensitive to the effects of water deficit during flowering and boll formation. Among the genotypes, BRS Topázio is the most tolerant to water deficit (40% of ETr) during the vegetative phase for the number of total seeds. The water deficit in the fruiting stage of colored cotton can be used in the cultivation of cotton with the lowest losses in the weight of 100 seeds.   Keywords: Gossypium hirsutum L., phytomass, production

scholarly journals Heterosis Studies for Seed Cotton Yield and Fibre Quality Traits in Upland Cotton (Gossypium hirsutum L.)

2020 ◽  
Author(s):  
V. Udaya ◽  
H. S. Saritha ◽  
Rajesh S. Patil
Keyword(s):  
Gossypium Hirsutum ◽  
Upland Cotton ◽  
Block Design ◽  
Crop Improvement ◽  
Quality Parameters ◽  
F1 Hybrids ◽  
Quality Traits ◽  
Fibre Quality ◽  
Gossypium Hirsutum L ◽  
Improvement Programme

Background: Cotton hybrids has its own advantage than varieties in yield and fibre properties. Heterosis breeding helps in identifying F1 hybrids and in creating variability. The chief intention of any hybridization programme is to combine all the desirable genes present in two or more parents into a single genetic background. Methods: This investigation helped in identifying the extent of heterosis in crosses among eight elite selected lines and five testers in upland cotton (Gossypium hirsutum L.) which was conducted at ARS Dharwad Farm during kharif 2017-18. The all 40 hybrids were derived by line × tester crossing which were analysed for productivity traits along with fibre quality in a randomised block design. Result: The hybrids, CPD-462 × SCS-1061, FLT-36 × SCS-1061 and CPD-462 × NNDC-30 were the most potential crosses. Crosses CPD-462 × IH-11 and FLT-44 × NNDC-24 also recorded desirable fibre quality parameters. These crosses can be exploited for crop improvement programme as they registered high per se performance combined with significant heterosis for most of the yield and fibre quality traits. This study reveals good scope for commercial exploitation of heterosis as well as isolation of potential progenies from the heterotic F1 hybrids.

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