scholarly journals USE OF NANOCOMPOSITE HYDROGEL WITH N-UREA IN THE PRODUCTION OF EGGPLANT SEEDLINGS

2020 ◽  
Vol 7 (4) ◽  
pp. 80-85
Author(s):  
Josiane Souza Salles ◽  
Marçal Henrique Amici Jorge ◽  
Edilson Costa ◽  
Raphael Augusto de Castro e Melo ◽  
Alexandre Henrique Freitas de Lima ◽  
...  
Keyword(s):  
Dry Matter ◽  
Water Retention ◽  
Water Retention Capacity ◽  
Nanocomposite Hydrogel ◽  
State University ◽  
Retention Capacity ◽  
Mato Grosso ◽  
Number Of Leaves ◽  
Mato Grosso Do Sul ◽  
Dickson Quality Index

The use of quality seedlings of eggplant is directly related to the success of their production, with polymers added to the substrate, which work as water conditioners, increase the water retention capacity, and provide better seedling quality. The study aimed to evaluate the use of nanocomposite hydrogel enriched with different proportions of N-urea in the production of eggplant seedlings. The experiment was conducted at the State University of Mato Grosso do Sul, Cassilândia, MS, Brazil, from June to August 2019, under sombrite® 30%. Five treatments were evaluated, using the commercial substrate, Carolina Soil®: 1) commercial substrate without hydrogel; 2) commercial substrate with 0.075g of pure hydrogel (0.00g of N-urea)/15 mL of a substrate; 3) commercial substrate with 0.075g of hydrogel and 10% N-urea/15 mL of a substrate; 4) commercial substrate with 0.075g of hydrogel and 20% N-urea/15 mL of a substrate, and 5) commercial substrate with 0.075g of hydrogel and 40% N-urea/15 mL of a substrate. The experiment was conducted with four replications of 25 seedlings. The emergence speed index, percentage of emergence, height, number of leaves, stem diameter, shoot dry matter, root dry matter, and total dry matter were evaluated, as well as the Dickson Quality Index. The data were subjected to analysis of variance (SPEEDSTAT statistical software) and grouping test of means. A regression analysis was performed to adjust equations for some of the variables. The best seedlings can be obtained using the dosage of 28.83% N-urea with 0.075g of hydrogel per 15 ml of the substrate, according to the DQI adjustment, which includes several traits of the seedlings, thus reflecting on its quality.

scholarly journals Emergence and Initial Development of Amaranth (Amaranthus cruentus L.) BRS Alegria at Different Depths of Seeding and Water Availability

2019 ◽  
pp. 1-9
Author(s):  
Ana Lucia da Silva ◽  
Aloísio Bianchini ◽  
Matheus Azevedo dos Santos ◽  
Patrícia Monique Crivelari da Costa ◽  
Pedro Silvério Xavier Pereira
Keyword(s):  
Water Availability ◽  
Dry Matter ◽  
Retention Capacity ◽  
Amaranthus Cruentus ◽  
Initial Development ◽  
Mato Grosso ◽  
Germination Process ◽  
Different Depths ◽  
Number Of Leaves ◽  
Nutrient Reserves

The depth of seeding and the availability of water influence the seed germination process. Amaranth has small seeds from 1.0 to 1.5 mm and limited nutrient reserves and, after emergence, slow growth. Thus, the objective of this work was to evaluate the emergence and formation of amaranth seedlings. The experiment was carried out in a vegetation house at the Federal University of Mato Grosso - Brazil, between October and November 2018. The factor "A" refers to two seeding depths (10 and 20 mm) and the factor "B" to four of water availability (100%, 80%, 60% and 40% of retention capacity). The emergency, first count and emergency speed index were evaluated. Height, diameter, root length, number of leaves, mass of fresh and dry matter were also evaluated. The emergence of the seedlings, independently of the seeding depth, was greater in water availability of 100 and 80%. There was interaction of factors for the first count and emergency velocity index. The first emergency count was higher in water availability of 100%. At a seeding depth of 10 mm, the first count of emerging seedlings was similar in water availability of 100, 80 and 40%. While, at a depth of 20 mm, the first count was higher at water availability of 60%. The emergency speed index was higher for 100% water availability at 10 mm seeding depth, while at 20 mm depth the water availability had no effect on the emergency speed index. The water availability of 60 and 40% of the retention capacity reduces the height of the plant, the diameter of the stem, the length of the root, the number of leaves, the mass of fresh and dry matter. Increased seeding depth reduces height, number of leaves and production of fresh and dry amaranth matter.

scholarly journals ACLIMATIZAÇÃO DE MUDAS MICROPROPAGADAS DE Anthurium maricense COM DIFERENTES LÂMINAS DE IRRIGAÇÃO

Irriga ◽  
2019 ◽  
Vol 24 (1) ◽  
pp. 25-37
Author(s):  
Arlene Santisteban Campos ◽  
Guilherme Vieira do Bomfim ◽  
Ana Cristina Portugal Pinto de Carvalho ◽  
Benito Moreira de Azevedo ◽  
Ana Cecília Ribeiro de Castro ◽  
...  
Keyword(s):  
Water Retention ◽  
Irrigation Management ◽  
Weather Conditions ◽  
Leaf Temperature ◽  
Ornamental Plant ◽  
Water Retention Capacity ◽  
Height Increment ◽  
Retention Capacity ◽  
Irrigation Depth ◽  
Number Of Leaves

ACLIMATIZAÇÃO DE MUDAS MICROPROPAGADAS DE Anthurium maricense COM DIFERENTES LÂMINAS DE IRRIGAÇÃO     ARLENE SANTISTEBAN CAMPOS1; GUILHERME VIEIRA DO BOMFIM2; ANA CRISTINA PORTUGAL PINTO DE CARVALHO3; BENITO MOREIRA DE AZEVEDO2; ANA CECÍLIA RIBEIRO DE CASTRO3 E DENISE VIEIRA VASCONCELOS4   1Departamento de ciência do solo, Universidade Federal do Ceará, Av. Mister Hull, 2977, Campus do Pici, CEP: 60356-001, Fortaleza, Ceará, Brasil, [email protected]. 2Departamento de engenharia agrícola, Universidade Federal do Ceará, Av. Mister Hull, 2977, Campus do Pici, CEP: 60356-001, Fortaleza, Ceará, Brasil, [email protected], [email protected]. 3Embrapa Agroindústria Tropical, Rua Pernambuco, 2270, Pici, CEP 60511-110, Fortaleza, Ceará, Brasil, [email protected], [email protected]. 4Instituto Federal de Educação, Ciência e Tecnologia do Pará, Estrada de Ferro de Bragança, s/nº, Taíra, CEP: 68600-000, Bragança, Pará, Brasil, [email protected].     1 RESUMO   O objetivo deste trabalho foi avaliar a influência de diferentes lâminas de irrigação na aclimatização de mudas micropropagadas de Anthurium maricense. O delineamento experimental foi o completamente ao acaso, composto por cinco tratamentos e quatro repetições de quatro mudas cada. Os tratamentos foram as lâminas de irrigação estimadas com cinco percentuais da capacidade de retenção de água (CRA) do substrato: 50; 75; 100; 125; e 150% da CRA. As mudas foram cultivadas individualmente em vasos de 415 mL contendo o substrato comercial HS Flores®. Durante a aclimatização, as mudas foram irrigadas duas vezes ao dia e receberam adubações foliares em dias alternados. Foram analisadas as variáveis: incremento na altura da muda (IAM); incremento no número de folhas por muda (INF); incremento na área da maior folha (IAMF); ocupação de vaso (OV); taxa de fotossíntese líquida (A); carbono interno (Ci); e temperatura (Ti) e umidade (Ui) foliar. Com base nos resultados, supõe-se que as mudas de A. maricense possam apresentar evidência de resistência ao déficit hídrico. A lâmina de irrigação estimada com 150% da CRA proporciona o maior valor de IAMF. Lâminas de irrigação intermediárias, entre 100 e 125% da CRA, proporcionam os maiores valores de IAM, INF e OV.   Palavras-chave: antúrio, plantas ornamentais, manejo da irrigação.     CAMPOS, A. S.; BOMFIM, G. V. do; CARVALHO, A. C. P. P. de; AZEVEDO, B. M. de; CASTRO, A. C. R. de; VASCONCELOS, D. V. ACLIMATIZATION OF MICROPROPAGATE PLANTLETS OF Anthurium maricense WITH DIFFERENT IRRIGATION DEPHTS     2 ABSTRACT   The aim of this study was to evaluate the development of micropropagated plantlets of Anthurium maricense during the acclimatization phase in screen environment, under different irrigation depths based on percentages of water retention capacity (WRC), on the weather conditions in the greenhouse environment. The experimental design was completely randomized, composed of five irrigation depths, with four replicates and four plantlets per plot. The treatments consisted of irrigation depths estimated with five levels of water retention capacity (WRC) of the substrate: 50; 75; 100; 125; and 150% of WRC. The plantlets were cultivated in 415 mL pots with HS Flowers® substrate. During the acclimatization, all plantlets were irrigated twice a day and fertilized, on alternate days, with leaf fertilization. The variables analyzed were: plant height increment (PHI); number of leaves increment (NLI); largest leaf area increment (LLAI); pot occupation (PO); net photosynthetic rate (A); internal carbon (Ci); leaf temperature (Ti) and leaf moisture (Ui). Based on the results obtained, it is assumed that A. maricense micropropagated plantlets may present evidence of resistance to water deficit. The estimated irrigation depth of 150% of WRC provides the highest value of LLAV. Intermediate irrigation depth, between 100 and 125% of the WRC, provide the highest values of PHV, NLV and PO.   Keywords: anthurium, ornamental plant, irrigation management.

scholarly journals PREDICTION OF THE NUTRITIVE VALUE OF ALFALFA (SARANAC), BROMEGRASS (SARATOGA) AND TIMOTHY (CHAMP, CLIMAX, BOUNTY) FED AS HAY TO GROWING SHEEP

1981 ◽  
Vol 61 (2) ◽  
pp. 403-413 ◽  
Author(s):  
J. R. SEOANE ◽  
M. CÔTÉ ◽  
P. GERVAIS ◽  
J. P. LAFOREST
Keyword(s):  
Dry Matter ◽  
Water Retention ◽  
Nutritive Value ◽  
Protein Digestibility ◽  
Nutrient Digestibility ◽  
Nitrogen Excretion ◽  
Dry Matter Intake ◽  
Water Retention Capacity ◽  
Retention Capacity ◽  
Protein Nitrogen

Forty-five male sheep (31.6 kg average body weight) were used to determine the nutritive value of three cultivars of timothy, (Champ, Climax and Bounty), one of bromegrass (Saratoga) and one of alfalfa (Saranac) fed as hays. Daily dry matter intake of Bounty (76.7 g/kg0.75 per sheep) was similar to that of alfalfa and bromegrass (76.4 and 73.9 g/kg0.75, respectively) and higher (P < 0.01) that that of Champ and Climax (65.1 and 65.8 g/kg0.75, respectively). Apparent nutrient digestibility values were highest for bromegrass, with the exception of protein, nitrogen-free extract and lignin, which were more digestible for alfalfa than for the grasses. Saratoga bromegrass had the highest TDN values and supported the highest average daily weight gains. Protein digestibility was directly related to the crude protein content of the hays (r = 0.98, P < 0.01). The true digestibility of nitrogen was estimated to be 90.12% with a metabolic nitrogen excretion of 4.46 g of N/kg of dry matter intake. Digestibility of cell contents was also directly related to its percentage in the forages (r = 0.97, P < 0.01). Dry matter digestibility was predicted from cell wall components by a summative equation (r = 0.96, P < 0.01). Voluntary dry matter intake (g/kg0.75) was negatively correlated with "water retention capacity" (r = − 0.99, P < 0.01) and with "packed volume" values of the hays (r = − 0.93, P < 0.05). It is suggested that under certain circumstances, the physical characteristics of hays such as density and water retention capacity are factors that influence voluntary intake.

scholarly journals Kalanchoe crop development under different levels of irrigation

Revista CERES ◽  
2016 ◽  
Vol 63 (5) ◽  
pp. 639-645 ◽  
Author(s):  
Fátima Cibele Soares ◽  
Ana Rita Costenaro Parizi ◽  
Francieli Ribeiro Corrêa ◽  
Francielle Altíssimo Bortolás ◽  
Jumar Luis Russi
Keyword(s):  
Water Retention ◽  
Irrigation Management ◽  
Water Retention Capacity ◽  
Retention Capacity ◽  
Study Region ◽  
Canopy Area ◽  
Crop Development ◽  
Crop Cycle ◽  
Number Of Leaves ◽  
Irrigation Levels

ABSTRACT Despite its importance in the floriculture sector, irrigation management of kalanchoe is characterized by empiricism, being necessary further studies on the use of water by this crop. Thus, the objective of this study is to analyze the several effects of irrigation levels on the growth of kalanchoe crop conducted in greenhouse in the municipality of Alegrete, state of Rio Grande do Sul. The experiment was conducted in a 7 x 15 m protected environment. The experimental design was completely randomized, with four treatments (irrigation levels corresponding to 40, 60, 80 and 100% of the pot water retention capacity - PC) and four repetitions, totaling sixteen plots. The crop cycle was 224 days after transplanting and the applied average depths were: 451.82; 367.38; 282.94; 198.51 mm for treatments: 100; 80; 60 and 40% of PC, respectively. Canopy area and number of leaves per plant were evaluated over the crop cycle. In the end of the cycle, the canopy diameter, number of inflorescences per plant and the number of flowers per plant were evaluated. No significant differences were found only to the canopy area, by the F test. Irrigation water depths between 40 and 70% of the pot capacity were more appropriate for the crop growth in the study region. The cultivar presented the best development at irrigation levels below the maximum vessel water retention capacity, that is, it is resistant to drought.

scholarly journals Photosynthetic metabolism and quality of Eugenia pyriformis Cambess. seedlings on substrate function and water levels

2014 ◽  
Vol 86 (4) ◽  
pp. 2039-2048 ◽  
Author(s):  
SILVANA P.Q. SCALON ◽  
TATIANE S. JEROMINI ◽  
ROSILDA M. MUSSURY ◽  
DAIANE M. DRESCH
Keyword(s):  
Water Retention ◽  
Poultry Litter ◽  
Water Levels ◽  
Water Retention Capacity ◽  
Retention Capacity ◽  
Internal Concentration ◽  
Chlorophyll Index ◽  
Photosynthetic Metabolism ◽  
Dickson Quality Index

The aim of this research was to evaluate the quality and photosynthetic metabolism of “uvaia” seedlings (Eugenia pyriformis Cambess.) on different substrates and water regimes. The seeds were sown in tubes of 50 x 190 mm in the following substrates: Sand (S), Latosol + Sand (L + S) (1:1), Latosol + Sand + Semi Decomposed Poultry Litter (L + S1 + PL) ( 1:1:0.5), Latosol + Sand + Semi Decomposed Poultry Litter (L + S2 + PL) (1:2:0.5), Latosol + Bioplant® (L + B) (1:1), and the water levels assessed were 50, 75 and 100% of water retention capacity. At 60, 90, 120 and 150 days the seedlings were evaluated according to their chlorophyll index, leaf area (cm2) and Dickson Quality Index (DQI) and at 150 days their internal concentration of carbon (mol m–2 s–1), stomatal conductance (mol m–2 s–1), transpiration rate (mmol m–2 s–1), photosynthesis (µmol m–2 s–1) and efficiency of water use (µmol de CO2 / mmol de H2O). Until their 150th days, the seedlings had higher quality and photosynthetic metabolism when cultured with substrates containing latosol + sand + poultry litter on the two variations assessed and water retention capacity of 50%.

scholarly journals Evapotranspiration and water sensitivity of Amazonian yellow ipe seedlings under different shading conditions

2019 ◽  
Vol 23 (10) ◽  
pp. 733-740
Author(s):  
Josiane F. Keffer ◽  
Cátia C. da Silva ◽  
Adilson P. de Souza ◽  
Andréa C. da Silva ◽  
Luana Bouvié ◽  
...  
Keyword(s):  
Water Retention ◽  
Potential Evapotranspiration ◽  
Water Retention Capacity ◽  
Dry Period ◽  
Retention Capacity ◽  
Mato Grosso ◽  
Water Sensitivity ◽  
Water Replacement ◽  
Maximum Water ◽  
Crop Coefficients

ABSTRACT The scarcity of information on the agroclimatic and ecophysiological requirements of forest species, especially in the initial phase, limits the production of quality seedlings, the planning and optimization of nurseries. The potential evapotranspiration, crop coefficients (kc) and water sensitivity coefficients (ky) of Amazonian yellow ipe seedlings were determined under different shading conditions and levels of water replacement to the substrate, in the dry period (July to October 2016), in the Cerrado-Amazon Rainforest transition region of the Mato Grosso state, Brazil. The experiment evaluated the full sun and black polyester nets with 35, 50, 65 and 80% shading, and the levels of water replacement to the substrate of 25, 50, 75 and 100% ETc in a split-plot scheme, with irrigation fractions established according to the maximum water retention capacity of the substrate. The water consumption of Amazonian yellow ipe was 239.2, 228.6, 204.1, 185.7 and 136.3 mm for cultivation under full sun and shading levels of 35, 50, 65 and 80%, respectively. The daily means of ETc were 3.37, 3.22, 2.87, 2.61 and 1.92 mm d-1, whereas the kc means were 1.13, 1.15, 1.05, 0.90 and 0.60 for the above-mentioned shading levels. ky values ranged from 0.89 to 1.28, with reduction due to the increase of water replacement and increase for higher shading percentage.

scholarly journals SUBSTRATE VOLUMES AND APPLICATION OF PACLOBUTRAZOL FOR ORNAMENTAL PEPPER PRODUCTION

2019 ◽  
Vol 6 (3) ◽  
pp. 1-5
Author(s):  
Naine Parladore ◽  
Abimael Gomes da Silva ◽  
Edilson Costa ◽  
Flávio Ferreira da Silva Binotti ◽  
Laura Araújo Silva ◽  
...  
Keyword(s):  
Quality Index ◽  
Foliar Application ◽  
Dry Mass ◽  
Diameter Ratio ◽  
Stem Diameter ◽  
State University ◽  
Mato Grosso ◽  
Mato Grosso Do Sul ◽  
Dickson Quality Index

The objective was to evaluate the quality of ornamental pepper seedlings, cultivar Pyramid, in different substrate volumes, with foliar application of paclobutrazol (PBZ).The experiment was carried out at the Mato Grosso do Sul State University - UEMS, in Cassilândia - MS. The experimental design was completely randomized, in a 2 x 2 factorial scheme (growth container x foliar application of PBZ) with four replicates of 36 seedlings each. Plastic trays (cells with a volume of 50 mL) and polystyrene trays (Isopor®, 100 mL cells) were used as containers. The treatments were: polystyrene tray with PBZ application; polystyrene tray without PBZ application; plastic tray with PBZ application and plastic tray without the application of PBZ. Plant height, root length, stem diameter, shoot dry mass, root dry mass, total dry mass, height/stem diameter ratio (H/D), shoot/root ratio (S/R) and Dickson quality index were evaluated. Foliar application of paclobutrazol resulted in robust pepper seedlings with reduced size, suitable and desirable characteristics for ornamental purposes. The polystyrene trays with higher volume cells (100 mL) contributed to the higher quality of ornamental pepper seedlings.

scholarly journals Carcass characteristics and meat quality of lambs fed high levels of spineless cactus in the diet

2021 ◽  
Vol 51 (4) ◽  
pp. 416-425
Author(s):  
S.B.L. Bezerra ◽  
R.M.L. Véras ◽  
A.M.V. Batista ◽  
A. Guim ◽  
M.V. Maciel ◽  
...  
Keyword(s):  
Meat Quality ◽  
Dry Matter ◽  
Water Retention ◽  
Carcass Characteristics ◽  
Water Retention Capacity ◽  
Retention Capacity ◽  
Quadratic Effect ◽  
Quadratic Effects ◽  
Intramuscular Fat Content

The objective was to evaluate the effect of increasing the dietary inclusion of spineless cactus (Nopalea cochenillifera Salm Dyck) on the carcass characteristics and meat quality of confined lambs. Thirty-two male Santa Inês lambs with an average age of 140 days and an initial body weight of 20.4 ± 2.60 kg were used in this study. The lambs were housed in individual stalls for 70 days and individually fed a ration with spineless cactus included at 0, 241, 519, or 753 g/kg of dry matter (DM). The lambs were slaughtered, and characteristics of the carcass and meat were recorded and analysed. Inclusion of spineless cactus had a quadratic effect on the bodyweight at slaughter and on the empty bodyweight of the lambs. The inclusion of 500 g/kg of spineless cactus provided the highest predicted cold carcass weight (16.03 kg). There was a quadratic effect of the inclusion of spineless cactus on the weight of meat cuts and leg composition of lambs. The inclusion of spineless cactus did not influence pH, tenderness, and water-retention capacity of the meat. However, the intramuscular fat content increased 1 mg for every 10 g/kg inclusion of spineless cactus in the diet. Quadratic effects were observed of the inclusion of spineless cactus on the weights of the liver, heart, rumen, blood, skin and internal fat of the lambs. Up to 500 g/kg of spineless cactus could be included in the diet of confined lambs.

scholarly journals Aspecto nutricional do biocarvão na produção de mudas de rúcula em condições semiáridas

2020 ◽  
Vol 16 (3) ◽  
pp. 12-17
Author(s):  
Joabe Freitas Crispim ◽  
Jailma Suerda Silva de Lima ◽  
Jessika Kaliane Barbosa da Silva ◽  
Antônio Gideilson Correia da Silva ◽  
Gabriel Kariel Ferreira Ferdandes ◽  
...  
Keyword(s):  
Water Retention ◽  
Plant Root ◽  
High Water ◽  
Dry Mass ◽  
Water Retention Capacity ◽  
Response Curves ◽  
R Software ◽  
Retention Capacity ◽  
Number Of Leaves ◽  
Neck Diameter

The biochar obtained from pyrolysis of vegetable biomass gives the plant a good nutritional supply and has a high water retention capacity, however there are still few studies evaluating its use in the production of leafy vegetable seedlings. With that, the objective of this work was to determine proportions of biochar in sand that allow better development of rocket seedlings. The experiment was conducted in a greenhouse at the Federal Rural University of the Semi-Arid (UFERSA). The experimental design used was completely randomized with six treatments (0; 10; 20; 30; 40; 50% of biochar) and ten replications. The evaluated characteristics were: Twinning; Number of leaves per plant; Root length; Plant height; Neck diameter; Fresh and dry mass of plants and water content in the plant. The data were submitted to analysis of variance. The procedure for adjusting the response curves was performed using the R software. The 50% biochar proportion is recommended in the production of arugula seedlings as it provides better development in the plants, promoting significant improvements in all the characteristics analyzed, except germination and number of leaves per plant.

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