尿素对天草桔橙负面影响的研究  

Research on the Negative Effects of Urea on Tiancao Orange

作　　者：李云腾[1] 何覃富 

机构地区：[1]广西职业技术学院,广西南宁530226 [2]崇左市左州镇168柑橘场,广西崇左532207

出　　处：《广西职业技术学院学报》2012年第4期8-11,共4页Journal of Guangxi Vocational and Technical College

摘　　要：研究不同的化学肥料对天草桔橙产量、品质和树势的影响。在5年生天草桔橙果园中设4个追肥处理:尿素、磷酸二胺、复合肥和不施肥(对照),测试商品果重量、品质,落果、病果病叶数和果树冠幅。施尿素对天草桔橙产量、品质和树势产生明显负面影响:产量比对照低30.5%,比施用磷酸二胺和复合肥分别低61.8%和117.6%;植株的落果率、病果病叶率及树冠冠幅随尿素用量的增加而提高,产量和品质下降。当尿素用量1.25kg/株时,对天草桔橙产量、品质和树势负面影响最大。This article makes research on the influence of different chemical fertilizers to the output, quality and tree vigor of Tiancao oranges. In the Tiancao orange field, 4 topdressing treatments are conducted to the orange trees which have been growing for 5 years ： urea, DAP, compound fertilizer and non-fertilizer treatment （compared）. After the 4 topdressing treatments, fruits weight, quality, number of premature drop and ill fruits, and tree crowns are tested. Urea has obvious negative effect to the output, quality and tree vigor of Tiancao oranges： the output is 30.5% lower than that of non-fertilizer treatment, 61.8% lower than that of using DAP, and 117% lower than that of using compound fertilizer. The rates of premature drop and ill fruits and the tree crown will be increased with the greater dosage of urea, but the output and quality will be decreased. When the dosage of urea is 1.25kg/per plant, the negative effect to output, quality and tree vigor is the greatest.

关 键 词：尿素 天草桔橙 负面影响 

分 类 号：S666.4[农业科学—果树学]