scholarly journals Evaluation of Some Physiological Responses Related to Nitrogen and Remobilization of Nitrogen in Wheat Affected by Supplemental Irrigation and Nitrogen Fertilization

2021 ◽  
Vol 11 (3) ◽  
Keyword(s):  
Nitrogen Fertilization ◽  
Physiological Responses ◽  
Supplemental Irrigation

scholarly journals High Nitrogen Fertilization Modulates Morpho-Physiological Responses, Yield, and Water Productivity of Lowland Rice under Deficit Irrigation

Agronomy ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1291
Author(s):  
Nasr M. Abdou ◽  
Mohamed A. Abdel-Razek ◽  
Shimaa A. Abd El-Mageed ◽  
Wael M. Semida ◽  
Ahmed A. A. Leilah ◽  
...  
Keyword(s):  
Nitrogen Fertilizer ◽  
Irrigation Water ◽  
Nitrogen Fertilization ◽  
Deficit Irrigation ◽  
Physiological Responses ◽  
Water Productivity ◽  
Water Shortage ◽  
Rice Production ◽  
Lowland Rice ◽  
Nitrogen Fertilizers

Sustainability of rice production under flooding conditions has been challenged by water shortage and food demand. Applying higher nitrogen fertilization could be a practical solution to alleviate the deleterious effects of water stress on lowland rice (Oryza sativa L.) in semi-arid conditions. For this purpose, field experiments were conducted during the summer of 2017 and 2018 seasons. These trials were conducted as split-split based on randomized complete blocks design with soil moisture regimes at three levels (120, 100 and 80% of crop evapotranspiration (ETc), nitrogen fertilizers at two levels (N1—165 and N2—200 kg N ha−1) and three lowland Egyptian rice varieties [V1 (Giza178), V2 (Giza177) and V3 (Sakha104)] using three replications. For all varieties, growth (plant height, tillers No, effective tillers no), water status ((relative water content RWC, and membrane stability index, MSI), physiological responses (chlorophyll fluorescence, Relative chlorophyll content (SPAD), and yield were significantly increased with higher addition of nitrogen fertilizer under all water regimes. Variety V1 produced the highest grain yield compared to other varieties and the increases were 38% and 15% compared with V2 and V3, respectively. Increasing nitrogen up to 200 kg N ha−1 (N2) resulted in an increase in grain and straw yields by 12.7 and 18.2%, respectively, compared with N1. The highest irrigation water productivity (IWP) was recorded under I2 (0.89 kg m−3) compared to (0.83 kg m−3) and (0.82 kg m−3) for I1 and I3, respectively. Therefore, the new applied agro-management practice (deficit irrigation and higher nitrogen fertilizer) effectively saved irrigation water input by 50–60% when compared with the traditional cultivation method (flooding system). Hence, the new proposed innovative method for rice cultivation could be a promising strategy for enhancing the sustainability of rice production under water shortage conditions.

scholarly journals Physiological Processes and Yield of Winter Wheat and Triticale under the Influence of Sprinkling Irrigation and Nitrogen Fertilization Part II. Acticity of Some Enzymes and Yield of Winter Wheat and Triticale

2013 ◽  
Vol 46 (1) ◽  
pp. 31-38
Author(s):  
Stanisław Kaczmarczyk ◽  
Ewa Koszańska ◽  
Daniel Ściążko ◽  
Małgorzata Roy
Keyword(s):  
Acid Phosphatase ◽  
Nitrate Reductase ◽  
Winter Wheat ◽  
Nitrogen Fertilization ◽  
Nitrate Nitrogen ◽  
Flag Leaf ◽  
High Nitrogen ◽  
Supplemental Irrigation ◽  
Physiological Processes ◽  
High Doses

The second part of this paper presents effects of supplemental irrigation and nitrogen fertilization on nitrate levels in flag leaf, activity of some enzymes and yield of winter wheat and triticale. Both sprinkling irrigation and high doses of nitrogen enhanced the activity of nitrate reductase and peroxydase and slightly that of acid phosphatase. Plants from plots treated with high rates of nitrogen contained more nitrate nitrogen. Sprinkling irrigation and intensive nitrogen fertilization significantly increased the crops of winter wheat and triticale. As effect of sprinkling the yield of winter wheat increased by 35 % and triticale by 14 %. High nitrogen doses affected the yield respectively by 92 and 115 % and the combined effect of both treatments increased the yield of winter wheat by 158 % (3.3 t/ha and triticale by 139 % 3.10 t/ha).

Protein and N-use efficiency of rainfed wheat responses to supplemental irrigation and nitrogen fertilization

2009 ◽  
Vol 55 (3) ◽  
pp. 315-325 ◽  
Author(s):  
Abolfazl Nasseri ◽  
Hossein Ali Fallahi ◽  
Ataollah Siadat ◽  
Kamal Eslami-Gumush Tappeh
Keyword(s):  
Nitrogen Fertilization ◽  
N Use Efficiency ◽  
Supplemental Irrigation ◽  
Use Efficiency ◽  
Rainfed Wheat ◽  
N Use

scholarly journals Nitrogen Fertilization and Liming Improves Growth, Production, Gas Exchange and Post-Harvest Quality of Yellow Flower Jambu

2020 ◽  
Vol 8 (3) ◽  
pp. 756
Author(s):  
Vivian Christine Nascimento Costa ◽  
Mário Lopes da Silva Júnior ◽  
Italo Marlone Gomes Sampaio ◽  
Ricardo Falesi Palha de Moraes Bittencourt ◽  
Stefany Priscila Reis Figueiredo ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Nitrogen Fertilization ◽  
Physiological Responses ◽  
Biomass Accumulation ◽  
Titratable Acidity ◽  
Production Performance ◽  
Soluble Solids ◽  
Post Harvest ◽  
Growth Production

Jambu is a vegetable, widely consumed in the Brazilian North Region, both in typical foods and medicinal herb. Despite its versatility, there are uncountable challenges in relation to its cultivation, especially with regard to the availability of information on nutritional management, such as the lack of data on the effect of liming associated with the supply of nitrogen (N) on the production performance of the crop. Thus, the effect of nitrogen fertilization and liming on growth, production, physiological responses and post-harvest quality of the yellow-flowered variety jambu was evaluated. The experimental design was randomized in factorial blocks (6 x 2), with five repetitions. The treatments consisted in the combination of six doses of N (0; 60; 90; 120; 150 and 180 kg ha-1) with and without liming application (0 and 70% V). The variables of growth, production, gas exchange and post-harvest quality of jambu were evaluated. Standardly, there was interaction between N-dose and liming factors for most of the analyzed variables, except for titratable acidity and total soluble solids and titratable acidity ratio. In general, the increasing of N doses combined with liming positively affected growth, production, physiological responses and post-harvest quality, and it was observed that in the 170 kg ha-1 dose of N higher response was obtained in the biomass accumulation of the aerial part and in the 180 kg ha-1 dose of N maximum production of inflorescences. Therefore, the use of correctives associated with nitrogen fertilization is recommended to obtain more significant production and quality of jambu.

scholarly journals Growth and physiology of maize under water salinity and nitrogen fertilization in two soils

2019 ◽  
Vol 23 (12) ◽  
pp. 907-913 ◽  
Author(s):  
Régis dos S. Braz ◽  
Claudivan F. de Lacerda ◽  
Raimundo N. de Assis Júnior ◽  
Jorge F. da S. Ferreira ◽  
Adriana C. de Oliveira ◽  
...  
Keyword(s):  
Zea Mays ◽  
Nitrogen Fertilization ◽  
Root Biomass ◽  
Saline Water ◽  
Physiological Responses ◽  
Water Salinity ◽  
Soil Columns ◽  
Gas Exchanges ◽  
Irrigation Water Salinity ◽  
Leaf Gas Exchanges

ABSTRACT The nitrogen fertilization, in general, minimizes the effects of salinity on plants, but the mitigating action depends on plant species, cultivar, soil texture and plant age, among other factors. The objective of this study was to evaluate the effects of irrigation water salinity and nitrogen fertilization on maize physiology and growth (Zea mays) in soils with different textures. The experiment was carried out in a greenhouse in Fortaleza City, CE, Brazil, in PVC soil columns (100 x 20 cm). The design was completely randomized using the factorial 2 x 2 x 4, referring to two soils, an Ultisol and a Quartzipsamment, nitrogen doses of 105 and 210 kg ha-1, under irrigation with saline water of 0.5, 2.0, 4.0 and 6.0 dS m-1, with four repetitions. With the exception of stem diameter, salinity of water impaired plant growth and leaf gas exchanges. The Ultisol provided better growth and physiological responses compared to the Quartzipsamment. The nitrogen doses did not mitigate growth variables except root biomass. The gas exchanges increased with the highest nitrogen dose, without interaction with the salinity.

scholarly journals Physiological Responses to N-NO3 and N-NH4 of Triazine Resistant and Susceptible Plants of Horseweed (Erigeron canadensis L.)

2013 ◽  
Vol 46 (1) ◽  
pp. 5-14
Author(s):  
Ryszard Stanek
Keyword(s):  
Nitrogen Source ◽  
Nutrient Solution ◽  
Nitrogen Fertilization ◽  
Dry Matter ◽  
Dark Respiration ◽  
Physiological Responses ◽  
Controlled Conditions ◽  
Erigeron Canadensis ◽  
Horticultural Practice ◽  
Better Than

Triazine resistant and susceptible biotypes of horseweed (<i>Erigeron canadensis</i> L.) were grown under controlled conditions in nutrient solution with NH<sub>4</sub> or NO<sub>3</sub> ions as nitrogen source. Indicators such as: dry matter, CO<sub>2</sub> assimilation, chloroplasts activity, dark respiration and the content of K, Ca, Mg in the above ground parts displayed lower levels when plants were fed with NH<sub>4</sub> than with NO ions. Reduction of these indicators was stronger for the triazine susceptible plants which grew better than their resistant counterparts when fed with N-NO<sub>3</sub>. The triazine resistant plants grown with N-NH<sub>4</sub> contained more protein-N and K than the susceptible ones. Chloroplasts of the resistant plants were also less sensitive to NH<sub>4</sub>CL treatment. It is concluded that the resistant plants appear to be more tolerant to NH<sub>4</sub> ions as compared with their susceptible counterparts. For this reason application of ammonium forms of nitrogen fertilization in horticultural practice could favour spreading of triazine resistant horseweed.

scholarly journals Productive and physiological responses of basil to nitrogen fertilization

2021 ◽  
Vol 39 (3) ◽  
pp. 335-340
Author(s):  
Italo MG Sampaio ◽  
Marcelo de A Guimarães ◽  
Janiquelle da S Rabelo ◽  
Caris dos S Viana ◽  
Francisca GA Machado
Keyword(s):  
Experimental Design ◽  
Stomatal Conductance ◽  
Plant Height ◽  
Nitrogen Fertilization ◽  
Physiological Responses ◽  
Physiological Traits ◽  
Carboxylation Efficiency ◽  
N Content ◽  
Fertilized Soil

ABSTRACT The aim of this study was to evaluate productive and physiological traits of basil cv. Italiano Genovese grown in nitrogen-fertilized soil. We studied five doses of nitrogen (25, 50, 75, 100 and 125 kg ha-1), in urea form. The experimental design was completely randomized, with four replicates. The maximum plant height was 79 cm, applying 65.7 kg ha-1 N. Shoot fresh and dry masses (814.1 g plant-1 and 111.4 g plant-1, respectively) and productivity (4.4 t ha-1) reached maximum values at 86.2; 80.2 and 82.5 kg ha-1 N, respectively. The highest N content in plant shoot was 26.1 g kg-1 at 125 kg ha-1 N. Photosynthesis and instantaneous carboxylation efficiency obtained maximum responses at doses of 85.3 and 83.3 kg ha-1 N, respectively. Stomatal conductance and transpiration increased with N additional rates.

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