苹果树盘内埋罐节水渗灌的效应

以无灌溉条件生长在丘陵地上的8年生红富士苹果树为试材，探讨了树盘内埋罐节水渗灌的生理生产效应，结果表明：树盘埋罐渗灌明显增加了新梢长度、短枝叶叶面积、叶绿素含量、光合和蒸腾速率，提高了树体的水分利用效率和果实的单果重、糖／酸比，降低了果实的可溶性固形物和含酸量。如果埋罐结合施肥。所测定的各项形态和生理指标均显著高于单独埋罐处理，果实品质也得到了改善。另外，各种处理还不同程度地提高了叶片和果实某些矿质元素的含量，降低了果实的N／Ca比。

EFFECTS OF WATER-SAVING SEEP IRRIGATION WITH POT ON APPLE TREES

year-old fuji apple trees grown on mound and hill without irrigation were used as materials in the experiment Some morphological and physiological effects of seep irrigation with pot buried under the earth on apple trees were studied Results showed that the shoot length,spur leaf area,chlorophyll content,photosynthetic and transpiration rates were increased due to seep irrigation with water pot under the trees Leaf WUE,fruit weight and ratio of total sugar to organic acids were also enhanced for treated trees But the contents of soluble solid and organic acids were lowered If seep irrigation with water pot was followed with applying fertilizers,a better result of both morphological and physiological indexes could be achieved In addition,fruit weight,fruit firmness and content of total sugar were also improved On the other hand,contents of some mineral elements in leaves and fruits were raised for treated plants Ratio of nitrogen to calcium (N/Ca) in fruits was lowered