Quantitative Analysis in Regulation Effects of Water-Fertilizer in Semi-arid Farmland
Based on a field study in the semi-arid Loess plateau of China, the strategies of limited irrigation on farmland in dry-period and pre-sowing of normalprecipitation years are studied comparatively, and the difference effects on water use and grain yield of spring wheat with dry-period irrigation, presowing irrigation and fertilizer application are examined. The results indicate that both dry-period irrigation and pre-sowing irrigation conduce to larger and deeper root systems, compared with the non-irrigated treatments. However, the promoting effect of dry-period irrigation is more significant under the same amount of supplemental irrigation and dry-period irrigation is more beneficial for the increase of grain yield. Furthermore, dry-period irrigation is more beneficial, for improving WUE and grain yield of spring wheat than pVe-sowing irrigation, and fertilizer application is more favorable for improving yield than without fertilizer application. The combination of dry-period irrigation and fertilizer application is the most efficient way for improving WUE and grain yield of spring wheat.
Spring wheat Pre-sowing irrigation and dry-period irrigation Fertilizer application Grain yield Water use efficiency Semi-arid farmland
Wenlong Li Jing Xu Zhiguang Liu Zizhen Li
School of Pastoral Agriculture Science and Technology,The key laboratory of agriculture grassland ag School of Life Science,Lanzhou University,Lanzhou 730000, China School of Agriculture&Forestry Econo School of Mathematics and Statistics,Lanzhou University,Lanzhou 730000, China
国际会议
山东淄博
英文
474-477
2011-05-27（万方平台首次上网日期，不代表论文的发表时间）