Effect of soil water and fertilizer on soybean yield on loess slopeland

Abstract

Abstract: 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 Pfertilizer when Pfertilizer 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 Pfertilizer. Compared to no fertilizer, fertilizer could significantly increase soybean yield and WUE by 86.76%～470.16% and 69.64%～438.47%, respectively. Acombined 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.

Key words: Slopeland, Effect of soil water and fertilizer, Water use efficiency, Loess soil, soil respiration, soil carbon cycle, rhizomicrobial respiration, clima-tic warming, root respiration

CLC Number:

S147.2

CHEN Hongsong, SHAO Ming'an, ZHANG Xingchang . Effect of soil water and fertilizer on soybean yield on loess slopeland[J]. Chinese Journal of Applied Ecology, 2003, (2): 211-214.

References

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