[Effect of soil water and fertilizer on soybean yield on loess slopeland].
Studies on the effect of soil water and fertilizer on soybean yield on loess slope farmland showed that soybean yield (Y) increased linearly with the increase of water use efficiency (WUE). Soybean yield and WUE increase with the increase of P fertilizer when P fertilizer was applied alone, but increased firstly and then decreased with the increase of N fertilizer when N fertilizer was applied alone. Therefore, N fertilizer should be applied with P fertilizer. Compared to no fertilizer, fertilizer could significantly increase soybean yield and WUE by 86.76%-470.16% and 69.64%-438.47%, respectively. A combined application of N and P fertilizers could increase more soybean yield and WUE than applied each of them alone, and the rational ratio of N and P (P2O5) was 1.3:1.
Chen
Hongsong
H
Laboratory of Soil Erosion & Dryland Farming, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Northwest Science and Technology University of Agriculture and Forestry, Yangling, 712100, China.
Shao
Ming'an
M
Zhang
Xingchang
X
D018556:Crops, Agricultural / Q000254:growth & development*; D005308:Fertilizers; D012987:Soil / Q000032:analysis*; D013025:Glycine max / Q000254:growth & development*; D014867:Water / Q000032:analysis*
D005308:Fertilizers; D012987:Soil; D014867:Water