期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2018
卷号：170
期号：2
页码：022171
DOI：10.1088/1755-1315/170/2/022171
语种：English
出版社：IOP Publishing
摘要：Soil Water Heat Carbon and Nitrogen Simulator (WHCNS) model was used to simulate the soil water and fertilizer coupling effect of potato in soft rock and sand compound soil, with a view to establishing a scheme to optimize soil water and fertilizer in local climate and soil properties. In this study, excessive irrigation will directly lead to a significant increase in water leakage. When irrigation or relatively large rainfall occurs, the soil moisture leakage increases significantly. Especially when there is a coincidence between irrigation and rainfall periods, the corresponding water leakage increases even more drastically. For the water and fertilizer management of potato in the soil under the meteorological conditions in the study area, an irrigation system of no more than 119 mm and a fertilization system of no more than 121 kg N/hm2 can be adopted. Excessive irrigation and fertilization cannot obtain more. Crop yields can only lead to increased water and fertilizer losses and reduced water and fertilizer use efficiency.
