控释BB肥对西瓜施用效果研究

目的]研究控释BB肥对西瓜的施用效果，为控释肥的推广使用提供理论依据。方法]以丰乐1号西瓜为试材，采用田间小区试验法研究了控释BB肥对西瓜产量、品质和氮素利用率的影响。结果]控释BB肥能显著提高西瓜产量，在等养分施用下较常规施肥增产20．18％，在养分减少20％的情况下，仍能增产8．69％；控释船肥能明显提高西瓜的品质，在等量、减量20％、减氮30％的3个不同控释BB肥处理中，西瓜果实的Vc和可溶性糖含量较常规施肥分别增加了28．69％和16．35％，硝酸盐含量也有显著的降低，氮素利用率分别较常规施肥提高38．13％、37．08％和27．79％。结论]控释BB肥具有延缓养分释放的功能，是一种既增产又经济，还对环境友好的肥料。

Study on Applied Effect of Controlled-release BB Fertilizer on Watermelon

Objective] The study aimed to study on the applied effect of controlled-release BB fertilizer on watermelon and provided the theoretical base for the population of controlled-release fertilizer.Method] In the field plot test,with Luofeng 1 watermelon as the tested material,the effect the controlled-release BB fertilizer on yield,quality and N utilization of watermelon were studied.Result] The controlled-release BB fertilizer could increase the yield of watermelon significantly,which could increase the yield by 20.18% or 8.69% than that by conventional fertilizer when the same quantity or 80% of fertilizers were applied.The controlled-release BB fertilizer could increase the quality of watermelon obviously.The vitamin C content and soluble sugar content in watermelon could be increased by 28.69% and 16.35% resp.on average in the 3 different treatments of controlled-release BB fertilizer with the same quantity,reducing 20% quantity and reducing 30% nitrogen.The nitrate content in in watermelon could be decreased remarkably and the N utilization could be improved by 38.13%,37.08% and 27.79% than that by conventional fertilizer.Conclusion] The controlled-release BB fertilizer had function of delaying nutrient release,so it was a kind of yield-increasing,economic and environmental friendly fertilizer.