以三棱豆为指示作物，在黄土高原中东地区新垦黄绵土上进行了施肥效应试验研究。结果表明，有机肥(羊粪30 000 kg/hm2)与化肥(N 180 kg/hm2、P2O5 120 kg/hm2、K2O 90 kg/hm2)配施是提高新垦土壤肥力和水分利用效率的重要农艺措施，可使新垦黄绵土(0～10 cm)土层有机质、全氮、全磷分别较不施肥提高55.6%、42.7%、43.9%。

The experiment for fertilization effect on indicator crop Lathyrus quinquenervius is carried out on newly cultivated loessal soil in the middle east of loess plateau. The result shows that the application of organic fertilizers(sheep manure 30 000 kg/hm2) combined with chemical fertilizer(N 180 kg/hm2， P2O5 120 kg/hm2， K2O 90 kg/hm2) is an importantly agronomic practice for improving soil fertility and water use efficiency in new-cultivated loessal soil so that it can respectively increase more 55.6% soil organic matter content， 42.7% total nitrogen content， 43.9% total phosphorus content than control group in 0～10 cm soil layer of new-cultivated loessal soil.

S153.6

国家科技支撑计划(2012BAD05B003)；国家自然科学基金(31460547)资助。