scholarly journals CRESCIMENTO E FOTOSSÍNTESE DO MILHO CULTIVADO SOB ESTRESSE SALINO COM ESTERCO E POLÍMERO SUPERABSORVENTE

Irriga ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 603-616
Author(s):  
Vanessa Ohana Gomes Moreira ◽  
Raimundo Nonato De Assis Júnior ◽  
Túlio Cordeiro Aragão
Keyword(s):  
Zea Mays ◽  
Root Length ◽  
Dry Matter ◽  
Zea Mays L ◽  
Photosynthetic Capacity ◽  
Saline Stress ◽  
Initial Growth ◽  
Superabsorbent Polymer ◽  
Biometric Parameters ◽  
E Mail

CRESCIMENTO E FOTOSSÍNTESE DO MILHO CULTIVADO SOB ESTRESSE SALINO COM ESTERCO E POLÍMERO SUPERABSORVENTE     VANESSA OHANA GOMES MOREIRA1; RAIMUNDO NONATO DE ASSIS JÚNIOR2 E TÚLIO CORDEIRO ARAGÃO3   1Engenheira Agrônoma, Mestra e Doutoranda em Ciência do Solo, Departamento de Ciência do Solo, Programa de Pós-Graduação em Ciência do Solo, Universidade Federal do Ceará, Campus do Pici – Bloco 807, CEP 60356-000, Fortaleza, Ceará, Brasil. E-mail: [email protected] 2Engenheiro Agrônomo, Doutor em Agronomia - Solos e Nutrição de Plantas, Professor Titular, Departamento de Ciência do Solo, Universidade Federal do Ceará, Campus do Pici – Bloco 807, CEP 60356-000, Fortaleza, Ceará, Brasil. E-mail: [email protected] 3Graduando em Química. Departamento de Química, Universidade Federal do Ceará, Campus do Pici - Bloco 940, CEP 60440-900, Fortaleza – Ceará, Brasil. E-mail: [email protected]     1 RESUMO   Esse trabalho objetivou avaliar o uso de esterco bovino e polímero iônico superabsorvente no crescimento inicial e na capacidade fotossintética de plantas de milho cultivadas em Neossolo Quartzarênico salino-sódico. O experimento foi instalado em casa de vegetação com quatro tratamentos: T1 - Controle; T2 – Polímero; T3 - Esterco bovino; T4 - Polímero + Esterco bovino. Foram avaliados os parâmetros biométricos: altura das plantas, diâmetro do colmo, área foliar, massa seca da parte aérea, comprimento e massa seca da raiz aos 45 dias após a emergência (DAE) das plantas. A fotossíntese foi avaliada em três momentos: aos 15, 30 e 45 DAE. Houve diferenças significativas pelo teste F (p < 0,05) nos parâmetros biométricos avaliados e na taxa de fotossíntese. As menores médias das variáveis analisadas foram obtidas no tratamento controle. A aplicação do polímero resultou em médias dos parâmetros biométricos e da fotossíntese estatisticamente menores que as médias do esterco bovino. A combinação de polímero e esterco promoveu incremento na capacidade fotossintética e no comprimento da raiz. Conclui-se que, o esterco é mais eficiente que o polímero na melhoria do crescimento inicial do milho sob estresse salino e, quando combinados, promovem maior capacidade fotossintética e maior crescimento das raízes.    Palavras-chave: salinidade do solo, hidrogel, adubo orgânico, Zea Mays L.     MOREIRA, V. O. G.; ASSIS JÚNIOR, R. N.; ARAGÃO, T. C. GROWTH AND PHOTOSYNTHESIS OF MAIZE CULTIVATED UNDER SALINE STRESS WITH MANURE AND SUPERABSORBENT POLYMER     2 ABSTRACT   This work aimed to evaluate the use of bovine manure and ionic superabsorbent polymer in the initial growth and in the photosynthetic capacity of maize cultivated in saline-sodium Quartzarenic Neosol . The experiment was installed in a greenhouse with four treatments: T1 - Control; T2 - Polymer; T3 - Bovine manure; T4 - Polymer + Bovine manure. Biometric parameters were evaluated: plant height, stem diameter, leaf area, aerial part dry matter, root length and root dry matter at 45 days after emergence (DAE). The photosynthesis was evaluated in three moments: at 15, 30 and 45 DAE. Significant differences were observed by the F test (p <0.05) in biometric parameters evaluated and photosynthesis rate. The application of the polymer resulted in lower averages than those of the bovine manure for all biometric parameters and photosynthesis. The combination of polymer and bovine manure promoted an increase in photosynthetic capacity and in root length. It is concluded that bovine manure is more efficient than polymer in improving the initial growth of maize under saline stress and when combined promote increase in rate of photosynthesis and root growth.   Keywords: soil salinity, hydrogel, organic fertilizer, Zea Mays L.

EFFECTS OF TEMPERATURE ON RATE AND DURATION OF KERNEL DRY MATTER ACCUMULATION OF MAIZE

1988 ◽  
Vol 68 (4) ◽  
pp. 935-940 ◽  
Author(s):  
M. TOLLENAAR ◽  
T. W. BRUULSEMA
Keyword(s):  
Growth Rate ◽  
Zea Mays ◽  
Dry Matter ◽  
Zea Mays L ◽  
Dry Weight ◽  
Controlled Environment ◽  
Dry Matter Accumulation ◽  
Linear Kernel ◽  
Effects Of Temperature ◽  
Kernel Growth

The response of rate and duration of kernel dry matter accumulation to temperatures in the range 10–25 °C was studied for two maize (Zea mays L.) hybrids grown under controlled-environment conditions. Kernel growth rates during the period of linear kernel growth increased linearly with temperature (b = 0.3 mg kernel−1 d−1 °C−1). Kernel dry weight at physiological maturity varied little among temperature treatments because the increase in kernel growth rate with increase in temperature was associated with a decline in the duration of kernel growth proportional to the increase in kernel growth rate.Key words: Zea mays L, period of linear kernel dry matter accumulation, controlled-environment conditions, kernel growth rate

scholarly journals DESENVOLVIMENTO INICIAL DE MUDAS DE BARUZEIRO (Dipteryx alata Vog) EM FUNÇÃO DE SUSBTRATOS E LÂMINAS DE IRRIGAÇÃO

Irriga ◽  
2017 ◽  
Vol 22 (2) ◽  
pp. 288-300 ◽  
Author(s):  
Henrique Fonseca Elias de Oliveira ◽  
Cléber Luiz De Souza ◽  
Danilo Vieira Félix ◽  
Leandro Da Silva Fernandes ◽  
Polliany Santos Xavier ◽  
...  
Keyword(s):  
Quality Index ◽  
Dry Matter ◽  
Block Design ◽  
Initial Growth ◽  
Aerial Portion ◽  
Randomized Block Design ◽  
System Length ◽  
E Mail ◽  
Dickson Quality Index ◽  
Dipteryx Alata

DESENVOLVIMENTO INICIAL DE MUDAS DE BARUZEIRO (Dipteryx alata Vog) EM FUNÇÃO DE SUSBTRATOS E LÂMINAS DE IRRIGAÇÃO  HENRIQUE FONSECA ELIAS DE OLIVEIRA1; CLÉBER LUIZ DE SOUZA2; DANILO VIEIRA FÉLIX2; LEANDRO DA SILVA FERNANDES2; POLLIANY SANTOS XAVIER2 E LUCAS MAGALHÃES ALVES2 1Eng. Agrícola, Doutor, Instituto Federal Goiano, GO 154, km 03, CEP 76300-000, Ceres – GO, e-mail: [email protected]ônomo (a), Instituto Federal Goiano, GO 154, km 03, CEP 76300-000, Ceres – GO, e-mail: [email protected], [email protected], [email protected], [email protected], [email protected]  1 RESUMO O presente estudo objetivou avaliar o crescimento inicial de plantas de baruzeiro, sob substratos e lâminas de irrigação e identificar o manejo que resulte em condições ideais para a produção de mudas desta espécie. Foi implantado um experimento no delineamento em blocos ao acaso, com quatro repetições, em parcelas subdivididas no esquema 5 x 4, sendo as parcelas compostas por lâminas de irrigação diárias (6, 8, 10, 12 e 14 mm) e as subparcelas substratos: S1 - 100% Latossolo vermelho; S2 - 50% Latossolo vermelho e 50% Areia; S3 - 45% Latossolo vermelho, 45% Areia e 10% Esterco Bovino Curtido e S4 - Substrato comercial Basaplant®. As características avaliadas foram altura de planta, diâmetro de caule, número de folíolos, comprimento de raiz, massa seca de raiz, massa seca de parte aérea, massa seca de muda, relação das massas secas de raiz e parte aérea e índice de qualidade de Dickson. Aos 200 dias após a semeadura (DAS) o substrato S1 proporcionou maior crescimento e qualidade às plantas de baruzeiro, dado pelo Índice de Qualidade de Dickson (IQD) obtido de 1,05, assim como a lâmina de 14 mm dia-1, a qual obteve IQD igual 0,98, diferindo estatisticamente das demais lâminas avaliadas. Palavras-chave: gotejamento, características produtivas, Índice de Qualidade de Dickson.  OLIVEIRA, H. F. E.; SOUZA, C. L.; FÉLIX, D. V.; FERNANDES L. S.; XAVIER, P. S.; ALVES, L. M.INITIAL DEVELOPMENT OF BARUZEIRO (Dipteryx alata Vog) SEEDLING AS FUNCTION OF SUBSTRATES AND IRRIGATIONS LEVELS  2 ABSTRACT This study aimed to evaluate the initial growth of baruzeiro plants, under substrates and irrigation levels and identify the management that results in ideal conditions for the production of seedlings of this species. The experiment was installed in a randomized block design, with four replications, in split-plot, in the scheme 4 x 5, with plots composed of five daily irrigations levels and four subplots substrates: S1 - 100% OXISOL RED; S2 - 50% OXISOL RED and 50% sand; S3 - 45% OXISOL RED, 45% sand, and 10% of tanned manure and S4 - Commercial Substrate Basaplant. The five daily watering (6, 8, 10, 12 and 14 mm) make up the subplot. The characteristics assessed were plant height, stem diameter, number of leaflets, root system length, dry matter mass of roots, dry matter mass of aerial portion, dry matter  mass of seedling, ratio between roots dry matter mass and aerial portion and seedling quality. At 200 DAS substrate S1 provided greater growth and quality to baruzeiro plants, given by the Dickson Quality Index (DQI) obtained of 1.05, as well as the irrigation depth of 14 mm day-1, once it obtained DQI equal to 0.98, statistically differing from the other irrigation depths assessed. Keywords: drip irrigation, productive characteristics, Dickson Quality Index.

scholarly journals Evaluation of effects of water-saving superabsorbent polymer on corn (Zea mays L.)yield and phosphorus fertilizer efficiency

2016 ◽  
Vol 40 ◽  
pp. 365-378 ◽  
Author(s):  
Adem GÜNEŞ ◽  
Nurgül KITIR ◽  
Metin TURAN ◽  
Erdal ELKOCA ◽  
Ertan YILDIRIM ◽  
...  
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Water Saving ◽  
Fertilizer Efficiency ◽  
Superabsorbent Polymer ◽  
Phosphorus Fertilizer

Grain yield, dry matter remobilization and chlorophyll content in maize (Zea mays L.) as influenced by nitrogen and water deficit

2018 ◽  
Vol 44 (3) ◽  
pp. 359-356
Author(s):  
Mahta Haghjoo ◽  
Abdollah Bahrani
Keyword(s):  
Zea Mays ◽  
Grain Yield ◽  
Chlorophyll Content ◽  
Water Deficit ◽  
Chlorophyll A ◽  
Dry Matter ◽  
Zea Mays L ◽  
Nitrogen Application ◽  
Significant Difference ◽  
Biological Yield

Out of 20, 40, 60 and 80 per cent moisture depletion 20% showed significantly higher grain yields, biological yield, chlorophyll a, b than the others. However, the highest contribution of stem and leaf dry matter remobilization in grain yield were obtained in 80% moisture depletion and 300 kg N/ha and the lowest one was found in the 20% moisture depletion and 150 kg N/ha. Nitrogen application increased all traits, however there were no significant difference between 250 and 300 kg N/ha.

scholarly journals Effect of Heavy Rainfall Events on the Dry Matter Yield Trend of Whole Crop Maize (Zea mays L.)

Agriculture ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 75 ◽  
Author(s):  
Kim ◽  
Chemere ◽  
Sung
Keyword(s):  
Time Series ◽  
Zea Mays ◽  
Dry Matter ◽  
Heavy Rainfall ◽  
Zea Mays L ◽  
Republic Of Korea ◽  
Dry Matter Yield ◽  
Rainfall Events ◽  
One Year ◽  
Heavy Rainfall Events

The objective of this study was to detect the historical dry matter yield (DMY) trend and to evaluate the effects of heavy rainfall events on the observed DMY trend of whole crop maize (WCM, Zea mays L.) using time-series analysis in Suwon, Republic of Korea. The climatic variables corresponding to the seeding to harvesting period, including the growing degree days, mean temperature, etc., of WCM along with the DMY data (n = 543) during 1982–2011, were used in the analysis. The DMY trend was detected using Autoregressive Integrated Moving Average with the explanatory variables (ARIMAX) form of time-series trend analysis. The optimal DMY model was found to be ARIMAX (1, 1, 1), indicating that the DMY trend follows the mean DMY of the preceding one year and the residual of the preceding one year with an integration level of 1. Furthermore, the SHGDD and SHHR were determined to be the main variables responsible for the observed trend in the DMY of WCM. During heavy rainfall events, the DMY was found to be decreasing by 4745.27 kg/ha (p < 0.01). Our analysis also revealed that both the intensity and frequency of heavy rainfall events have been increasing since 2005. The forecasted DMY indicates the potential decrease, which is expected to be 11,607 kg/ha by 2045. This study provided us evidence for the correlation between the DMY and heavy rainfall events that opens the way to provide solutions for challenges that summer forage crops face in the Republic of Korea.

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