耒阳市双季晚稻氮、磷、钾肥利用率初探

Preliminary Study on Nitrogen, Phosphorous and Potash Fertilizer Utilization of Double-Cropping Late Rice in Leiyang City

为了探明耒阳市常规施肥下晚稻的氮、磷、钾利用率现状,以及测土配方施肥对提高氮、磷、钾利用率的效果,以湖南省主导双季晚稻品种T优272为供试品种进行了大田施肥试验。结果表明：与常规施肥相比,测土配方施肥可提高化肥当季利用率2.23~3.97个百分点,是提高化肥当季利用率的有效途径。

Taking double-cropping late rice Tyou 272 as experimental variety, field fertilizer experiment was conducted to study Nitrogen, phosphorous and potash fertilizer utilization under regular fertilizing and formula fertilization by soil testing conditions. The result showed that compared with regular fertilizing, chemical fertilizer utilization rate of formula fertilization by soil testing treatment increased by 2.23- 3.97 percentage points. So it was an efficient way to increase chemical fertilizer utilization rate by formula fertilization by soil testing.