摘要
生活垃圾在堆肥过程中将产生有机酸类物质,这些酸性物质对难溶性磷具有较强的溶解能力.本研究在生活垃圾堆肥过程中,加入难溶性磷矿粉,系统探讨堆肥对难溶性磷的转化及堆肥产品对磷素有效性的影响.研究表明,速效磷在堆肥中后期达到最大值,并在堆肥的后期相对稳定,堆肥结束后,扣除磷矿粉本身含有的速效磷对堆肥的影响,与不加磷矿粉堆肥相比,P1、P2堆肥处理方式速效磷含量增加值分别为0.87g.kg-1、0.76g.kg-1.电镜观察表明,堆肥结束后,磷矿粉表面棱角消失,呈蜂窝状.堆肥产品培肥后,富磷垃圾肥在作物生育期内,土壤速效磷含量、酸性磷酸酶活性均高于垃圾肥、腐熟鸡粪及化肥.
During municipal solid waste （MSW） composting, both organic acid production and sparingly soluble inorganic phosphate solubilization occur simultaneously. In this study, compost consisted of residual MSW with metal, plastic and glass removed, and sparingly soluble phosphate （ground rock phosphate） was mixed in municipal solid wastes composting. The effects of composting on solubilization of sparingly soluble phosphate as well as the effects of compost production （P-enrlched MSW compost） on soil rapidly available phosphorus were studied. Mixing ground rock phosphate into composting, rapidly available phosphorus increase at initial stage, achieved maximum at medium stage, and stabilize at final stage of MSW composting. At final stage of composting, the content of rapidly available phosphorus in treatment P~ and P2 increase respectively by 0.87 g·kg^-1 , 0.76 g·kg^-1 compared with that with no mixing ground rock phosphate. Scanning electron microscopy （SEM） reveals a number of cavities in ground rock phosphate surface. After compost products amended soil, the content of soil rapidly available phosphorus and acid phosphatase activity of P-enriched MSW compost amendment increase obviously compared with MSW compost, chicken manure compost, and chemical fertilizer amendment during crop duration.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2007年第3期679-683,共5页
Environmental Science
基金
国家重点基础研究发展规划(973)项目(2005CB724203)
哈尔滨市学科后备带头人基金项目(2005AFXXJ043)
东北农业大学博士基金项目
关键词
生活垃圾
堆肥
难溶性磷
磷素有效性
municipal solid waste
composting
insoluble phosphate
rapidly available phosphorus
