滦河流域沙区冬小麦合理施肥技术研究

栾河流域沙区土壤沙化现象严重 ,提高冬小麦种植效益 ,有助于扩大冬小麦种植面积及治沙用沙。而合理施肥技术是改善沙区冬小麦增产不增收的有效手段之一。作者于 1997～ 1999年在河北省滦县农业试区进行了冬小麦土壤养分限制因子与高产高效施肥指标试验研究。结果表明 ,在滦河流域沙区 ,氮和钾是冬小麦产量的土壤养分限制因子 ,限制因子对冬小麦产量的效应 N>K2 O。提出优化施肥指标 ,即单施化肥时 ,N、K2 O用量分别为 2 97.6～ 313.7kg/ hm2 和 170 .7～ 179.0 kg/ hm2 ;每公顷施用 30 t有机肥时 N、K2 O用量分别为 2 93.4～ 312 .8kg/ hm2 和15 1.5～ 15 9.2 kg/ hm2 。

Study on Rational Fertilizing Technology for Winter Wheat in the Ecological Sand Region of Luanhe River Basin

The soil in the ecological sand region seriously degenerated in Luanhe River Basin. Improvement of the economic benifit of winter wheat is useful for enlarging the grown area of winter wheat and managing sand soil. The rational fertilizer technology is one of the available measure for improving the income of winter wheat in this ecological sand region. An experiment on the soil nuteient resteictive factors and high yielding high effective fertilizer applecation was conducted in Luanxian County Experiment Region of Hebei province from 1997 to 1990. The result showed that in the ecological sand region near Luanhe River Basin, nitrogen and potassium were restrictive factors of winter wheat yield. The restricting effects on winter wheat yield were N>K 2O.The single application of N for best result was 297.60~313.65 kg/hm 2, and 170.7~178.95 kg/hm 2 for K 2O. When 30 t/hm 2 organic fertilizer was added, the application of N was 293.40~312.75 kg/hm 2, and 151.50~159.15 kg/hm 2 for K 2O application.