摘要
以１０年生新红星苹果树为试材，探讨了旺长树、丰稳树和衰老树３种植株类型的水分利用效率（ＷＵＥ）及有关参数的日变化。结果表明：（１）无论是充足供水还是土壤干旱，ＷＵＥ顺序均为丰稳树＞衰弱树＞旺长树；（２）土壤干旱提高了旺长树的ＷＵＥ，而降低了丰稳树和衰弱树的ＷＵＥ；（３）土壤含水量的降低对光合的负影响旺长树最小、丰稳树次之，衰弱树最大。
Tenyeaarold Starkrimson apple trees were used as materials in the experiment.Diurnal variations of water use efficiency (WUE) and relevant parameters for trees with different growth vigor were studied. The main results were as follows: (1)No matter whether adequate water was supplied or not,WUE of robust trees was the highest, vigorous trees the lowest and weak trees in the middle. (2)WUE was increased for vigorous trees and decreased for robust and weak trees under soil drought. (3)For all three kinds of trees,with the reduction of soil water content,photosynthetic rate (Pn) was decreased in the order:weak trees>robust trees >vigorous trees.
出处
《干旱地区农业研究》
CSCD
北大核心
1999年第2期111-115,共5页
Agricultural Research in the Arid Areas
基金
山东省教委"果树需水规律与自动化控制研究"攻关课题
山东省政府科技攻关课题
关键词
苹果树
植株类型
水分利用效率
apple tree
types of trees with different vigor
water use efficiency
