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[目的]探讨氮磷钾不同配比对柑桔裂果的影响,以期找到最有效的防裂果组合。[方法][结论]通过配施N、P、K不同比例地面复合肥与喷洒不同的矿物营养元素叶面肥处理组合来防止裂果试验。[结果]在春季用肥料配比N∶P2O5∶K2O=20∶10∶10,夏秋用肥料配比N∶P2O5∶K2O=16∶8∶16,叶面喷施0.5%硝酸钙液的处理组合防裂果效果最好。同时分析不同处理中叶片的N与K比值,N与Ca的比值,Ca与K的比值,发现树体中N与K的比值(N/K)和N与Ca的比值(N/Ca)同裂果呈正相关,即比值越大,裂果越重。树体中Ca与K的比值(Ca/K)与裂果成负相关,其比值越大,裂果越轻。[结论]为避免柑桔裂果,生产中应该根据土壤的墒情、树势的优劣、季节的更替等平衡全面地施肥。
[Objective] The research aimed to discuss the effect of different proportion of N, P and K on cracked fruit of citrus so as to find the most effective combination of anti-crack fruit. [Method] [Conclusion] The combination of N, P, K different proportion of ground compound fertilizer and spraying different mineral nutrient foliar fertilizer combination to prevent crack fruit test. [Result] In the spring with fertilizer ratio N:P2O5:K2O = 20:10:10, fertilizer ratio N: P2O5:K2O = 16:8:16 in summer and autumn, foliar application of 0.5% calcium nitrate solution Anti-cracking fruit the best. At the same time, the ratio of N to K, the ratio of N to Ca and the ratio of Ca to K in different treatments were analyzed. The ratio of N to K (N / K) and the ratio of N to Ca Cracking is positively correlated, that is, the greater the ratio, the more cracked fruit. The ratio of Ca to K in the tree (Ca / K) was negatively correlated with the split fruit. The greater the ratio, the lighter the split fruit. [Conclusion] In order to avoid citrus cracked fruit, fertilizer should be balanced and comprehensively produced according to the soil moisture, the advantages and disadvantages of tree vigor and the alternation of seasons.