滴灌条件下不同施肥水平对枣树生长效应及产量构成要素的影响

Research on the Effect of Different Fertilization Levels on Jujube Growth and Yield Constituting Factors under Drip Irrigation

【目的】研究滴灌条件下施肥对枣树生长效应的影响,探讨适宜成龄枣树的施肥量和施肥配比。【方法】采用随机区组布置试验方案进行田间小区试验,研究滴灌条件下不同施肥水平对枣树叶片重量、叶绿素、蒸腾速率、叶水势、产量及产量构成要素的影响。【结果】枣树产量与新枝数、新枝枣吊数、二次枝枣吊数呈正相关关系,其中与新枝数之间的关系呈显著正相关,与其余生理指标呈负相关关系;随着施肥量的增加枣树产量也随之增长,其中施肥量为300 kg/667m^2是成龄枣树较优的施肥量。【结论】随施肥量的增大,枣树叶水势呈现出降低的趋势,单果重呈现出先上升后下降的趋势。枣树产量明显的增产作用。

【Objective】To research the effect of different fertilizer levels on the jujube growth under the drip irrigation condition probe into the fertilizing amount and the rate of fertilizer application. 【Method】field plot experiment by using randomized block test scheme to study the effect of different fertilizer levels on the blade weight chlorophyll transpiration rate leaf water potential yield and yield inscape of the jujube.【Result】Under the tested conditions there was a positive correlation between the jujube yield and new branch number of jujube shedding shoot of new branch and the number of jujube shedding shoot of secondary branch. the relationship between was significantly positively related,and the rest negatively related physiological indexes.With the increase of fertilizer rate its jujube production,he results show that 300 kg /667m2 was the optimal fertilizer rate. 【Conclusion】As volume increas the leaf water potential of the presented decreasing trend,single fruit weight tended to rising then falling trend. It showed