氮、磷、钾施肥配比对红枣光合特性与产量的影响

以滴灌为条件设置不同水肥处理,研究氮磷钾施肥配比对红枣光合、产量与品质的影响。结果表明：土壤中增施氮素有利于枣树叶片的净光合速率,土壤中氮、磷、钾素都适度时可以很好地降低枣树叶片的蒸腾速率,减少土壤水分的损耗;在设计水平范围内,土壤中适量增施氮、磷肥能提高红枣果实单果质量和产量,并在一定程度上改善果形指数;增施钾肥可提高红枣果实中还原糖和Vc的含量,增施氮肥则可提高蛋白质的含量。图2,表4,参8。

Influence on Photosynthetic Characteristics and Yield of Zizyphus Jujube under Different Treatments of N, P, K

Designing different treatments of water and fertilizer under drip irrigation,and Studying Photosynthetic characteristics,yield and fruit quality of Zizyphus Jujube.The results show that it is advantage for Pn of Zizyphus Jujube leaves to apply more fertilizer N in soil.it can low Tr of Zizyphus Jujube leaves and decrease the consumption of soil water.it can increase the single fruit weight and yield to apply more fertilizer N and P to soil in range of designed level,and improve the fruit shape index.It can increase the contents of revertose and vitamin C in fruit of Zizyphus Jujube to apply more fertilizer K to soil,and it can increase the content of protein in fruit of Zizyphus Jujube to apply more fertilizer N to soil.