不同有机肥处理对西瓜产量的影响

Effect of Different Organic Fertilizers on Yield of Watermelon

为探讨有机西瓜生产中适宜的有机肥种类及其施用量,采用基于根层实时调控的Nmin(miner-alized N,包括铵态氮和硝态氮)管理技术,研究了西瓜关键生育期进行有机肥的追肥处理对西瓜产量的影响。结果表明:各有机肥处理使西瓜产量明显提高,其中,传统有机肥处理产量最高(60.7 kg·hm-2),有机肥组合、有机肥组合+根层调控处理产量次之,分别为44.9 kg·hm-2和43.7 kg·hm-2。传统有机肥处理(CT)中土壤Nmin处于较高水平,在伸蔓期达到高峰(160 kg·hm-2)而后降低到100 kg·hm-2以下。推荐施用的有机肥种类为腐熟合格的鸡粪有机肥,施肥量可适当增加。

We evaluated the effect of top dressing at critical watermelon growing stage with organic fertilizer on its yield using a Nmin management technology based on soil profile nutrition regulation. The results shown that all of the organic fertilizer treatments increased yield significantly. The yield（60.7 kg/hm2）was highest with the conventional organic fertilization treatment,and the combined organic fertilizer treatment and combined organic fertilizer plus top dressing treatment took the second place（44.9 kg/hm2 and 43.7 kg/hm2）. The Nmin with the conventional fertilization treatment was at a relatively high level varied from 160 kg/hm2 at full vining stage to below 100 kg/hm2 later. The composted chicken manure is the best choice in this tests and the quantity of application should be increased properly.