scholarly journals Improving winter wheat grain yield and nitrogen use efficiency using nitrogen application time and rate

age ◽  
2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Lawrence Aula ◽  
Peter Omara ◽  
Fikayo B. Oyebiyi ◽  
Elizabeth Eickhoff ◽  
Jonathan Carpenter ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Nitrogen Use Efficiency ◽  
Nitrogen Application ◽  
Application Time ◽  
Wheat Grain ◽  
Nitrogen Use ◽  
Use Efficiency

scholarly journals Effect of subsoiling on tillers, root density and nitrogen use efficiency of winter wheat in loessal soil

2019 ◽  
Vol 65 (No. 9) ◽  
pp. 456-462
Author(s):  
Guohua Lv ◽  
Wei Han ◽  
Hanbo Wang ◽  
Wenbo Bai ◽  
Jiqing Song
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Nitrogen Use Efficiency ◽  
Triticum Aestivum L ◽  
Root Penetration ◽  
Deep Soil ◽  
Humid Climate ◽  
Nitrogen Use ◽  
Use Efficiency ◽  
Plough Pan

A 2-year field experiment was carried out in loessal soil in a semi-humid climate to research winter wheat (Triticum aestivum L.) growth and nitrogen use efficiency. The result showed that subsoiling increased root penetration and promoted deep soil water absorption, which resulted in high resilience to the adverse dry climate. Soil NO<sub>3</sub><sup>–</sup>-N residue throughout the profile was decreased but increased in rotary tillage. Grain yield was significantly increased by 21.9% and 11.3% in 2016 and 2017, respectively, mainly due to the significantly larger spikes per hectare and grains per spike. Nitrogen use efficiency was significantly improved by 26.7% in 2016 and 13.8% in 2017. For loessal soil in semi-humid climate, breaking the plough pan was necessary, and it was useful for the increase of grain yield and nitrogen use efficiency.

scholarly journals Integrated management strategy for improving the grain yield and nitrogen-use efficiency of winter wheat

2018 ◽  
Vol 17 (2) ◽  
pp. 315-327 ◽  
Author(s):  
Hai-cheng XU ◽  
Xing-long DAI ◽  
Jin-peng CHU ◽  
Yue-chao WANG ◽  
Li-jun YIN ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Nitrogen Use Efficiency ◽  
Management Strategy ◽  
Integrated Management ◽  
Nitrogen Use ◽  
Use Efficiency

scholarly journals Optimized split nitrogen fertilizer increase photosynthesis, grain yield, nitrogen use efficiency and water use efficiency under water-saving irrigation

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Zhen Zhang ◽  
Yongli Zhang ◽  
Yu Shi ◽  
Zhenwen Yu
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Water Use Efficiency ◽  
Water Use ◽  
Nitrogen Use Efficiency ◽  
Nitrogen Fertilizer ◽  
Water Saving ◽  
Nitrogen Use ◽  
Use Efficiency ◽  
Nitrogen Ratio

AbstractThis study aims to investigate optimization of the basal-top-dressing nitrogen ratio for improving winter wheat grain yield, nitrogen use efficiency, water use efficiency and physiological parameters under supplemental irrigation. A water-saving irrigation (SI) regime was established and sufficient irrigation (UI) was used as a control condition. The split-nitrogen regimes used were based on a identical total nitrogen application rate of 240 kg ha−1 but were split in four different proportions between sowing and the jointing stage; i.e. 10:0 (N1), 7:3 (N2), 5:5 (N3) and 3:7 (N4). Compared with the N1, N2 and N4 treatments, N3 treatment increased grain yield, nitrogen and water use efficiencies by 5.27–17.75%, 5.68–18.78% and 5.65–31.02%, respectively, in both years. The yield advantage obtained with the optimized split-nitrogen fertilizer application may be attributable to greater flag leaf photosynthetic capacity and grain-filling capacity. Furthermore, the N3 treatment maintained the highest nitrogen and water use efficiencies. Moreover, we observed that water use efficiency of SI compared with UI increased by 9.75% in 2016 and 10.79% in 2017, respectively. It can be concluded that SI along with a 5:5 basal-top-dressing nitrogen ratio should be considered as an optimal fertigation strategy for both high grain yield and efficiency in winter wheat.

scholarly journals Review of Active Optical Sensors for Improving Winter Wheat Nitrogen Use Efficiency

Agronomy ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1157
Author(s):  
Lawrence Aula ◽  
Peter Omara ◽  
Eva Nambi ◽  
Fikayo B. Oyebiyi ◽  
William R. Raun
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Optical Sensors ◽  
Nitrogen Use Efficiency ◽  
Optical Sensor ◽  
Management Practices ◽  
N Uptake ◽  
Nitrogen Use ◽  
Use Efficiency ◽  
N Management

Improvement of nitrogen use efficiency (NUE) via active optical sensors has gained attention in recent decades, with the focus of optimizing nitrogen (N) input while simultaneously sustaining crop yields. To the authors’ knowledge, a comprehensive review of the literature on how optical sensors have impacted winter wheat (Triticum aestivum L.) NUE and grain yield has not yet been performed. This work reviewed and documented the extent to which the use of optical sensors has impacted winter wheat NUE and yield. Two N management approaches were evaluated; optical sensor and conventional methods. The study included 26 peer-reviewed articles with data on NUE and grain yield. In articles without NUE values but in which grain N was included, the difference method was employed to compute NUE based on grain N uptake. Using optical sensors resulted in an average NUE of 42% (±2.8% standard error). This approach improved NUE by approximately 10.4% (±2.3%) when compared to the conventional method. Grain yield was similar for both approaches of N management. Optical sensors could save as much as 53 (±16) kg N ha−1. This gain alone may not be adequate for increased adoption, and further refinement of the optical sensor robustness, possibly by including weather variables alongside sound agronomic management practices, may be necessary.

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