摘 要：
通过对不同尿素、羊厩肥配比下的秋茬和春茬番茄大棚栽培试验 ,探讨了大棚地膜栽培条件下 ,有机肥与无机肥施用配比与经济产量的关系。试验表明 ,大棚土壤养分含量水平较高 ,番茄最高经济单产 6 5 75 0 .33kg·hm-2 的化学纯氮施用量为N 2 5 5kg·hm-2 ,羊厩肥施用量为 2 6 .2 5t·hm-2 ;实际经济施肥量应低于上述施用量。本试验进一步探讨了施肥与土壤养分含量及盐分含量变化的关系 ,结果认为大棚地膜覆盖条件下 ,肥料的施用能以较快的速度改变土壤养分水平和盐分状况。尿素施用量增加能显著增加土壤速效氮和全氮的含量 ;羊厩肥的施用能明显提高土壤有机质、全氮、速效磷、速效硫和速效钾的含量水平。尿素、羊厩肥类有机肥的过量施用会引起土壤次生盐渍化。覆盖地膜条件下 ,尿素的施用能显著增加土壤水溶性铵盐的含量 ;羊厩肥通过提供K+ 、Na+ 、Ca2 + 、Mg2 + 、SO2 -4 及PO3 -4 来提高土壤水溶性盐分含量。
译 名：
Effect of Fertilizer Application on the Accumulation of Soil Nutrients in Plastic Tunnel for Tomato Cultivation
作 者：
Xia Lizhong,Yang Linzhang (Nanjing Institute of Soil,Nanjing 210008)
关键词：
Sheep waste, Urea, Nutrient accumulation, Second salinization
摘 要：
Experiment on effects of fertilizer application in protected tomato cultivation on the changes of the contents of soil nutrients and soil salinity under various fertilization models were conducted in the autumn of 2000 and the spring of 2001. The results showed that the application of N at rate of 225 kg·hm -2 with sheep waste at 26.2 t·hm -2 reached the highest yield, but the economically optimum application rate should be below 225 kg·hm -2. Over application of N from urea enhanced water soluble NH + 4, sheep waste was abundant of K +, Na +,Ca 2+,Mg 2+,SO 2- 4 and PO 3- 4, and built up soil salinity level.
