氮、磷、钾肥对玉米倒伏及其产量的影响

 本文从高产水平下的氮、磷、钾肥用量着手，研究了玉米茎秆的化学成分和解剖结构与倒伏之间的相互联系。结果表明，倒伏率与茎秆含钾量、粗纤维含量、硬皮组织厚度、维管束面积的大小有密切关系，增施钾肥可以增加茎秆的含钾量，有利于提高粗纤维含量，促进了硬皮组织和维管束鞘的发育，从而提高了茎秆强度，减轻了玉米倒伏及其对产量的影响。

EFFECT OF NITROGEN,PHOSPHATE AND POTASH FERTIL IZERS ON LODGING AND YIELID IN MAIZE

With different kinds of fertilizers (N.P.K) used in field trials in 1985, the relations between anatomical structure, chemical composition of stalk and the lodging trait in maize were studied. The results showed different fertilizers had significant influence upon the stalk morphology, chemical composition and dissected structure.Lodging rates associated closely with the content of Potassium and rough fibre, the area of vascular bundle and rind thickness in transverse section stalk. Increasing the quantity ot potash fertilizer raised the content of Potassium and rough fibre and promoted the developing of selerified stalk tissue and the vascular bundle, which heightened stalk strength and ligthenod lodging and increased the yield in Maize.