节水栽培地幼龄枣树生长与发育规律

隔坡集蓄径流水平沟幼龄枣树的生长发育情况与以往鱼鳞坑和水平池方式有着明显不同。首先，在枣树根蘖苗成活率和保存率方面，前者极显著地高于后两者，成活率高达96．7％；其次在地上部和地下部的生长方面，前者的干径、枝展、枣头枝数、二次枝节数、根系总长、根系总重等方面均极显著高于后两者，这就决定了隔坡集蓄径流水平沟枣树丰产性能要远远高于鱼鳞坑和水平池，结果株率提高27．7％，结果吊率提高31．7％，坐果率提高3．36倍。另外、，沟间距以5m～6m为最好。

Growth and Development of Young Jujube in Water-saving Cultivation

The growth and development of young jujube trees in contour strips with trough is remarkably dif ferent from those in pit and le6el strips. The former type is higher than latter tw3 types in the survival rate,remaining rate, in the growth of shoot and root systems, the stem diamelfer, canopy, amount of jujube head and amount of secondary shoot, total length of root and total weight of rCIOt. Thi:i makes yield of jujube trees in contour strips with trough much higher than those in pit and leve1 strips, frui'f-bearing shoot increased by 27. 7 %, fruit-bearing percentage 31. 7 %, fruit setting is 3. 36 times. Strip distance of 5 m~6 m is recom-mended.