摘要
在露天自然条件下对鸡粪进行好氧堆肥,系统研究了堆肥过程中氮素的径流和淋洗损失。结果表明,堆肥期间通过径流损失的氮素只占初始堆肥氮素的3‰~6‰,其中无机氮与有机氮约各占50%,径流中总氮浓度在不同时间和降雨量条件下差异较大,浓度平均在20 mg/L左右;氮素表现出很强的空间移动性,堆肥期间氮素至少能够迁移至150 cm土层,对当地地下水安全构成了严重威胁;堆肥过程中可能有35%~65%的氮素会通过氨挥发损失;用秸秆覆盖堆体能显著降低堆肥氮素的径流损失,而添加沸石减少堆肥氮素损失的效果不显著。
Chicken manure was composted in open windrow to understand the losses of nitrogen(N) through runoff and leaching.During the composting process,only 3‰~6‰ of initial nitrogen was lost through runoff,in which about 50% was organic nitrogen.The volume of total nitrogen concentration of runoff was related to the time and precipitation,and the average level is about 20 mg/L.The nitrogen had a strong mobility and leached to 150 cm soil at least during composting,which was a danger to the groundwater quality.During the composting there maybe 35%~65% of nitrogen was lost by NH3 volatilization.The compost covered by straw had the least nitrogen runoff,while the zeolite did not reduce the loss of nitrogen significantly compared to other treatments.
出处
《水土保持学报》
CSCD
北大核心
2011年第2期44-47,共4页
Journal of Soil and Water Conservation
基金
国家自然科学基金(41001047)