不同施氮水平对嫁接和自根黄瓜生长和生理的影响

目的]比较不同施氮水平对越冬茬嫁接与自根黄瓜生长和生理的影响。方法]以嫁接和自根黄瓜为试材，通过日光温室栽培试验研究了不同施氮水平对其叶绿素含量、光合速率日变化等生理指标的影响。结果]拉秧前嫁接植株的最高和最低株高分别为221．4和172．8cm，自根植株的分别为144．0和106．9cm。生长前期和中期，嫁接黄瓜中G2的叶片数最多，自根黄瓜中s3的叶片数最多。嫁接植株生长前期的叶面积大于后期，自根植株则相反。2月8日以前，嫁接植株的最佳光合叶面积大于自根植株．之后小于自根植株。初果期和盛果期，嫁接植株中G3的叶绿素a含量最高，自根植株中s3的最高；嫁接植株的叶绿素a／b比值小于同等氮肥水平的自根植株。初果期，嫁接植株中G2的硝酸还原酶活性最高，盛果期和末果期G3的最高；整个生育期，自根植株中s3的都最高。结论]该研究为氮肥在日光温室栽培黄瓜中的合理使用提供了科学依据。

Effects of Different Nitrogen Application Levels on the Growth and Physiology of Grafted and Self-rooted Cucumber

Objective] The purpose was to compare the effects of different nitrogen application levels on the growth and physiology of grafted and self-rooted cucumbers from autumn to spring.Method] With grafted and self-rooted cucumbers as tested materials,the effects of different nitrogen application levels on their physiological indexes such as chlorophyll content and daily change of photosynthetic rate were studied through the cultivation experiment in solar greenhouse.Result] Before uprooting,the highest and lo...