不同生育期揭膜对旱地地膜覆盖玉米生理性状和产量的影响  

The Effect of Different Growth Period Uncovering Membrane in Dry Land on Corn Physiological Properties and Yields

作　　者：贺润喜[1,2] 王玉国[1,2] 赵金鱼 

机构地区：[1]山西农业大学 [2]阳泉市农牧局

出　　处：《山西农业大学学报》1999年第1期16-18,共3页

基　　金：山西省科委区域开发项目

摘　　要：旱地地膜覆盖玉米在不同生育期进行揭膜处理，其生理性状和产量都有明显差异，尤其是大喇叭口揭膜，由于适当地利用了生育前期覆膜的增温保墒效应，揭膜后又提高了土壤的透气性和接纳降雨的数量，因此，玉米在不同生育期的根系活力、功能叶水势、硝酸还原酶活力、叶绿素含量、净光合速率、游离脯氨酸含量等生理指标均有相应变化，早衰现象得到缓减、百粒重增加，产量高于其他处理。orn physiological properties and yields have obvious difference by uncovering membrane in different growth periods,especially big-bell period.Covering membrane earlier stage have affect of preservation of soil moisture and temperature.Meanwhile,capacity of soil aerated and receiving railfall were improved.Physiological indexes occured relevant changes,such as root activity,leaf potential,activity of nitrate reductase,chlorophyll content,net photosynthesis and free proline content.Earlier decline was slow,grain weight and yields were increased.

关 键 词：玉米 旱地 地膜覆盖 大喇叭口揭膜 栽培 

分 类 号：S513.04[农业科学—作物学]