农业工程学报2011，Vol.27Issue(11)：300-305,6.DOI:10.3969/j.issn.1002-6819.2011.11.057
基于钾平衡和氮淋失风险的红壤猪粪安全用量
Safety amount of pig manure application based on potassium balance and nitrate leaching risk on red soil
摘要
Abstract
The effect of 8-year application of pig manure and lime addition on potassium balance was investigated on red soil (Udic Ferralsols) with maize monoculture in subtropical China. The content of soil available potassium, leaching and uptake of potassium were measured under different application rates of organic manure (0, 59 and 237 kg/hm2 for CK, LM and HM treatment, respectively) and with lime addition (application rates of organic manure 237 kg/hm2 by lime addition 1 t/(hm2 a) for HML treatment). The results showed that continuous manure application increased the content of soil available K and K supply capacity. The K leaching did not increase with increasing manure application rate. More than 69% of potassium from manure was taken up by crop and higher utilization efficiency was found in LM which ultimately resulted in depletion of soil potassium pool. On the contrary, high manure application (HM and HML) annually replenished 48-57 kg/hm2 with lower utilization efficiency. The manure application rate was 180 kg/hm2 when considering only crop K demand and soil K pool balance. Considering the nitrate contamination risk, the manure application should be controlled under 155 kg/hm2 with a supplement of 25 kg/hm2 by chemical fertilizer.关键词
有机肥/土壤/施钾量/氮淋失风险/钾素平衡/安全施肥量Key words
manures/soils/potassium fertilizer/potassium balance/risk of nitrate leaching/safe manure amount分类
农业科技引用本文复制引用
龙光强,孙波..基于钾平衡和氮淋失风险的红壤猪粪安全用量[J].农业工程学报,2011,27(11):300-305,6.基金项目
国家重点基础研究发展计划项目(2011CB100506) （2011CB100506）
国家科技支撑计划项目(2009BADC6B003) （2009BADC6B003）
中国科学院知识创新领域前沿项目(ISSASIP0730)资助. （ISSASIP0730）
