Soil water consumption, water use efficiency and winter wheat production in response to nitrogen fertilizer and tillage

PeerJ

article

Shahbaz Khan¹  Sumera Anwar²  Yu Shaobo¹  Zhiqiang Gao¹  Min Sun¹  M. Yasin Ashraf²  Aixia Ren¹  Zhenping Yang¹ 

[1] College of Agriculture, Shanxi Agricultural University;Institute of Molecular Biology and Biotechnology, The University of Lahore

关键词: Triticum aestivum L.;    Soil water content;    Loess plateau;    Nitrogen use efficiency;    Protein yield;    Tillage practices;    WUE;    Biomass;    Grain yield;    Bulk density;   

DOI  :  10.7717/peerj.8892

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Sustainability of winter wheat yield under dryland conditions depends on improving soil water stored during fallow and its efficient use. A 3-year field experiment was conducted in Loess Plateau to access the effect of tillage and N (nitrogen) rates on soil water, N distribution and water- and nitrogen-use efficiency of winter wheat. Deep tillage (DT, 25–30 cm depth) and no-tillage (NT) were operated during fallow season, whereas four N rates (0, 90, 150 and 210 kg ha−1) were applied before sowing. Rates of N and variable rainfall during summer fallow period led to the difference of soil water storage. Soil water storage at anthesis and maturity was decreased with increasing N rate especially in the year with high precipitation (2014–2015). DT has increased the soil water storage at sowing, N content, numbers of spike, grain number, 1,000 grain weight, grain yield, and water and N use efficiency as compared to NT. Grain yield was significantly and positively related to soil water consumption at sowing to anthesis and anthesis to maturity, total plant N, and water-use efficiency. Our study implies that optimum N rate and deep tillage during the fallow season could improve dryland wheat production by balancing the water consumption and biomass production.

【 授权许可】

CC BY