钾对龙眼产量和品质的影响

为了提高龙眼产量，提高钾肥的施肥效益，于1993～1995年进行龙眼果园不同钾肥用量的施肥试验．结果表明，龙眼在施用氮碗肥及补充土壤缺乏的中微量元素养分的基础上，增施钾肥可增大果型、提高单果重，显著增加果实产量，并可改善果实品质；龙眼增施钾肥有明显的经济效益．提出龙眼适宜的施钾量为：每株每产50kg鲜果树面年施K2O1.2kg．

Effect of Potassium Application on Yield and Quality of Longan

Two orchard experiments were camed out in 1993 - 1995 to investigate the response of longan to potassium (K) application. The results showed that longan fruit yields and profits increased with the increase of potassium application rates, based on the application of N, P and other suspected deficient micro-secondary nutrients of the soil.Potassium application increased hoit size, single fruit weight and improved fruit quality with higher contents of vitamin C and soluble sugar. The proper application rate of K for longan should be 1.2 kg K2O/tree one year (50 kg fruit setting potential).