拔节期追施KH_2PO_4对小麦生理特性和产量性状的影响

Effectof Applying KH2 PO4in Jointing Stage on Physiological Characters and Yield Characters of Wheat

在拔节期土壤追施 KH2 PO4 可提高旗叶叶绿素含量和光合速率 ,增加籽粒的灌浆速度 ,增强根系活力 ,延缓植株的衰老速度 ,提高抵抗干热风的能力 ,增加穗粒数和千粒重。施用量以每亩2 .5～ 3.75kg为佳。

The same fertilizer applied by different methods in different stages has different effects on crop growth.The test results of a pplying KH2 PO4in jointing stage showed that,in the late growing of wheat,application of KH2 PO4could raise the chloropyll content and photo- synthesis rate of flag leaf,grain filling rate. ear grain weight root activity and the resistance to dry heat wind and could delay the senile rate of plant and increase wheat yield.