化工进展Issue(8)：1967-1973,7.DOI:10.3969/j.issn.1000-6613.2013.08.043
磷在土壤中的固定机制和磷肥的高效利用
Mechanisms of phosphorus fixation in soils and efficient utilization of phosphate fertilizer
摘要
Abstract
The utilization efficiency of phosphate fertilizer in the whole life of plant is only 10%-25%. By analyzing the research progress in the literatures,it indicates that the phosphorus is easily fixed in soils,including adsorption fixation and chemical reaction fixation. The amount of phosphorus fixed is determined by the content of calcium carbonate,iron oxide,aluminum oxide,clay and the initial concentration of phosphorus in soils. Most of phosphorus is fixed in adsorption fixation in early period, which lasts several hours to tens of hours. In later period,chemical reaction fixation occurs mainly and lasts a few months to a few years,which results in phosphorus unavailable to plants. The dynamics of the entire fixation period can be described by Elovich equation. For reducing the amount of phosphorus fixed, an efficient way is to reduce the concentration of phosphorus in soils. By using the fixation data from the red soil in Shenxian (in Zhejiang province,China),together with the research data on the phosphorus uptake of cole,the release,the fixation and the plants uptake of phosphorus are quantitatively analyzed. The calculation result based on the established mathematical model indicates that the consumption amount of fertilizer can be greatly reduced and utilization efficiency can be increased by fertilizing the mixed DAP and controlled released DAP,compared with that by fertilizing DAP only.关键词
磷肥/利用率/固定/控释肥/土壤Key words
phosphate fertilizer/utilization efficiency/fixation/controlled-release fertilizer/soil分类
化学化工引用本文复制引用
安迪,杨令,王冠达,蓝锐,王亭杰,金涌..磷在土壤中的固定机制和磷肥的高效利用[J].化工进展,2013,(8):1967-1973,7.基金项目
国家自然科学基金项目（20876085）。 （）
