摘要
果园土壤中的水分直接影响着果树的生长发育。试验表明 :覆草、覆膜效果明显好于清耕。果园覆盖后大大减少了土壤水分的蒸发 ,其土壤含水量分别比对照提高 2 3 44 %、 18 39%。覆草、覆膜后 ,苹果树的根系活力、叶片相对含水量、新梢长度、叶面积大小、叶绿素含量均高于对照 ,硝酸还原酶活性、光合强度比对照有明显提高 。
The study of effects of ground cover and Plastic Mulching on growth and development of young apple trees on dry soil showed that the soil water content improved 23 44% and 18 39%.The root activity,leaf relative water content,the shoot length,leaf area,the content of chlorophyll,the nitrate reductase activity,photosynthetic rate all increased significantly.The membrane permeability decreased.
关键词
覆草
覆膜
苹果树
幼树
生长发育
Ground cover
Plastic mulchin
Dry soil
Young apple tree
