Nitrogen use efficiency evaluation of aerobic rice under field capacity water potential using 15N isotopic tracer technique

2015 ◽  
Author(s):  
Ahmad Nazrul Abd Wahid ◽  
Sahibin Abd Rahim ◽  
Khairuddin Abdul Rahim ◽  
Abdul Rahim Harun
Keyword(s):  
Water Potential ◽  
Nitrogen Use Efficiency ◽  
Field Capacity ◽  
Aerobic Rice ◽  
Efficiency Evaluation ◽  
Tracer Technique ◽  
Nitrogen Use ◽  
Isotopic Tracer ◽  
Use Efficiency

scholarly journals Growth, production and water and nitrogen use efficiency of maize under water depths and nitrogen fertilization

2019 ◽  
Vol 23 (10) ◽  
pp. 747-753
Author(s):  
David H. Campelo ◽  
Adunias dos S. Teixeira ◽  
Luis C. J. Moreira ◽  
Claudivan F. de Lacerda
Keyword(s):  
Water Depth ◽  
Nitrogen Use Efficiency ◽  
Maximum Yield ◽  
Field Capacity ◽  
Nitrogen Use ◽  
Area Index ◽  
N Dose ◽  
Irrigation Depth ◽  
Use Efficiency ◽  
Water Depths

ABSTRACT The objective of this study was to evaluate the growth, the production components and the water (WUE) and nitrogen use efficiency (NUE) in maize (Zea mays L.), as function of water depths and nitrogen doses. The experimental design was randomized blocks in a split-plot scheme with four repetitions. The irrigation treatments applied in the plots were composed of four water depths: 80, 90, 100 and 110% of the water requirement, based on the soil field capacity, while the N doses, distributed in the subplots, were 0, 60, 120 and 180 kg ha-1. Increases in water depths and in N doses promote linear increases in plant height and leaf area index. For cycle I (2015) the maximum yield (16,778.3 kg ha-1) was reached with the irrigation depth of 538.1 mm and nitrogen dose of 180 kg ha-1; and for cycle II (2016), the maximum yield was reached with the irrigation depth corresponding to 505 mm and N dose of 180 kg ha-1, yielding 17,819.5 kg ha-1. The highest values of WUE (4.1 and 3.8 kg m-3) were estimated in cycle I (2015) for 432.7 mm and in cycle II (2016) for 359.6 mm, respectively; while the highest values of NUE (67.5 and 65.3 kg kg-1) were estimated in cycle I (2015), for the water depth of 555.7 mm and nitrogen dose of 113.3 kg ha-1, and in cycle II (2016), for the water depth of 506 mm and nitrogen dose of 107.7 kg ha-1.

scholarly journals Nitrogen-use Efficiency Evaluation and Genome Survey of Vietnamese Rice Landraces (Oryza sativa L.)

2018 ◽  
Vol 1 (2) ◽  
pp. 142-155
Author(s):  
Hanh Thuy Thi Nguyen ◽  
Linh Thụy Mai Dinh ◽  
Trung Quoc Nguyen ◽  
Cuong Van Pham
Keyword(s):  
Oryza Sativa ◽  
Nitrogen Use Efficiency ◽  
Oryza Sativa L ◽  
Efficiency Evaluation ◽  
Nitrogen Use ◽  
Genome Survey ◽  
Rice Landraces ◽  
Use Efficiency

ROLE OF CONSERVATION AGRICULTURE IN IMPROVING PRODUCTION WATER AND NITROGEN EFFICIENCY OF WHEAT UNDER RAINFED CONDITIONS

2020 ◽  
Vol 51 (4) ◽  
pp. 1139-1148
Author(s):  
Othman & et al.
Keyword(s):  
Crop Rotation ◽  
Nitrogen Use Efficiency ◽  
Agricultural Research ◽  
Research Work ◽  
Conservation Agriculture ◽  
Nitrogen Efficiency ◽  
Research Station ◽  
Wheat Varieties ◽  
Nitrogen Use ◽  
Use Efficiency

The research work was conducted in Izra’a Research station, which affiliated to the General Commission for Scientific Agricultural Research (GCSAR), during the growing seasons (2016 – 2017; 2017 – 2018), in order to evaluate the response of two durum wheat verities (Douma3 and Cham5) and two bread wheat varieties (Douma4 and Cham6) to Conservation Agriculture (CA) as a full package compared with Conventional Tillage system (CT) under rainfed condition using lentils (Variety Edleb3) in the applied crop rotation. The experiment was laid according to split-split RCBD with three replications. The average of biological yield, grain yield,  rainwater use efficiency and nitrogen use efficiency was significantly higher during the first growing season, under conservation agriculture in the presence of crop rotation, in the variety Douma3 (7466 kg. ha-1, and 4162kg. ha-1, 19.006 kg ha-1 mm-1,  39.62 kg N m-2respectively). The two varieties Douma3 and Cham6 are considered more responsive to conservation agriculture system in the southern region of Syria, because they recorded the highest grain yields (2561, 2385 kg ha-1 respectively) compared with the other studied varieties (Cham5 and Douma4) (1951 and 1724 kg ha-1 respectively). They also exhibited the highest values of both rainwater and nitrogen use efficiency.

Grain Yield and Nitrogen Use Efficiency of Mid-seasonIndicaRice Cultivars Applied at Different Decades

2015 ◽  
Vol 41 (3) ◽  
pp. 422 ◽  
Author(s):  
Cheng-Xin JU ◽  
Jin TAO ◽  
Xi-Yang QIAN ◽  
Jun-Fei GU ◽  
Bu-Hong ZHAO ◽  
...  
Keyword(s):  
Grain Yield ◽  
Nitrogen Use Efficiency ◽  
Nitrogen Use ◽  
Use Efficiency
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