摘要
以含P2O528.97%的同一胶磷矿制备的3种细度磷矿粉为供试材料,采用2%柠檬酸连续浸提的方法,研究了细度和厩肥发酵对磷矿粉释磷效果的影响。结果发现,连续3次浸提的枸溶性磷,细化磷矿粉PR2(400目)和细化磷矿粉PR3(800目)均较普通磷矿粉PR1(100目)提高,达显著水平(P>0.05),细度高的磷矿粉释磷快;磷矿粉与牛粪1∶2混合发酵3周后,PR1、PR2、PR3的枸溶性磷含量分别达到发酵前的1.42倍、1.65倍和1.56倍,发酵后PR3的枸溶性磷含量达到未发酵普通磷矿粉PR1的2倍,显示了两种技术结合的累加效应;增加厩肥比例对等质量的磷矿粉活化效果好。
Taking three different mesh of rock phosphate powder made of the same collophanite whose total P2O3 content is 28.97 % as tested materials,the effect that the degree of fineness and the heating of manure makes on phosphorus release is studied by means of continuously extracting with 2% citric acid. It shows that in the first 3 extractions,the citric soluble phosphorus contents of the fine rock phosphate powder PR2（400 mesh）and the superfine rock phosphate powder PR3（800 mesh） both are higher than that of the ordinary PR1 at significant level（P〉0.05）and that the finner rock phosphate powder is, the more rapidly it releases its phosphorus. After having fermented mixed with cattle manure at rate 1 ： 2 for 3 weeks,the contents available phosphorus of PR1 ,PR2,PR3 reach 1.42,1.65,1.56 times of those of themselves of before fermentation respectively, and even the contents of PR3 reaches 2 times of that of PR1 of before fermentation,which indicts cumulative effect of the two techneques. The equivalent rock phosphate powder is better actived if adding the proportion of manure.
出处
《水土保持学报》
CSCD
北大核心
2009年第2期210-212,共3页
Journal of Soil and Water Conservation
基金
国家自然科学基金项目(50474003)
国家“十一五”科技支撑计划项目(2006BAK02A00)
关键词
磷矿粉
超微细
磷有效性
发酵
释磷
rock phosphate powder
superfine
phosphorous availability
fermentation
phosphorus release
