摘要
采用盆栽试验方法,在自然降雨条件下模拟研究了亚热带红壤丘陵区花生—萝卜轮作体系下三种肥力红壤对猪粪的安全消纳能力。通过监测试验3年间土壤渗漏水硝酸盐迁移淋失,结合土壤速效磷累积和花生产量变化,初步确定3种肥力红壤的猪粪安全消纳量。试验结果表明:常规化肥减半用量下,从硝态氮淋失以及速效磷积累角度,低肥力、中肥力和高肥力红壤配施猪粪最大安全用量分别为P 800 kg·hm^(–2)、P 100 kg·hm^(–2)和P 50 kg·hm^(–2),从花生产量角度考虑持续配施猪粪施用量不宜超过P 800 kg·hm^(–2)、P 100 kg·hm^(–2)和P 100 kg·hm^(–2)。综合考虑经济效益和环境效益,低肥力、中肥力和高肥力红壤配施猪粪的最大安全消纳量分别为P 800 kg·hm^(–2)、P 100 kg·hm^(–2)和P 50 kg·hm^(–2)。
A pot experiment under natural rainfall with three red soils of different fertility levels was investigated to estimate the maximum safe pig manure loading capacity in Ecological Experimental Station of Red Soil,Chinese Academy of Sciences.The maximum safe capacity for pig manure application in red clay soil under peanut-radish system was estimated by monitoring the nitrate-N in leachate,the peanut production and the accumulation of nutrients in the soil.The results showed that the maximum safe application rate of pig manure was P 800 kg·hm^–2,P 100 kg·hm^–2 and P 50 kg·hm^–2 for red clay soil of low fertility soil,medium and high fertility soils,respectively,for the treatment with half of conventional chemical fertilizers from the viewpoint of groundwater and soil environment protection.From the viewpoint of peanut production,the safe application rate of pig manure should be no more than P 800 kg·hm^–2 for low fertility soil,P 100 kg·hm^–2 for medium fertility soil and P 50 kg·hm^–2 for high fertility soil.Taking economic interests and environmental impacts into account,the maximum safe pig manure loading capacity could be P 800 kg·hm^–2,P 100 kg·hm^–2 and P 50 kg·hm^–2 for red clay soil of low fertility soil,medium and high fertility soils,respectively.
作者
张迪
周志高
王兴祥
ZHANG Di;ZHOU Zhigao;WANG Xingxiang(Nanjing Xiaozhuang University,School of Environmental Science,Nanjing 211171,China;Key Laboratory of Soil Environment and Pollution Remediation,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China;Jiangxi Key Laboratory of Ecological Research of Red Soil,Experimental Station of Red Soil,Chinese Academy of Sciences,Yingtan 335211,China)
出处
《生态科学》
CSCD
2018年第5期140-145,共6页
Ecological Science
基金
江苏省高校自然科学研究面上项目(16KJB610010)
南京市环境科学与工程重点建设学科项目
公益性行业(农业)科研专项(201203050)
关键词
红壤
肥力
猪粪
消纳量
red soil
soil fertility
pig manure
maximum safe loading capacity
作者简介
张迪(1985—),女,山东烟台人,博士,讲师,主要从事循环农业研究,E-mail:zhangdi@njxzc.edu.cn;通信作者:王兴祥(1967—),男,博士,研究员,主要从事规模养殖污染治理与资源循环利用。
