利用硅藻土提高化肥肥效的研究  

Effects of Diatom-clay on Fertilizer Efficiency

作　　者：陈菁[1] 臧小平[1] 孙光明[1] 徐晓玲[1] 

机构地区：[1]中国热带农业科学院南亚热带作物研究所,广东湛江524091

出　　处：《土壤通报》2003年第6期551-553,共3页Chinese Journal of Soil Science

基　　金：中国热带农业科学院1998年度科技基金资助

摘　　要：通过对硅藻土结构观察、养分吸附和不同硅藻土与肥料比例肥效试验,结果表明,硅藻土具有多孔质结构,湿润后孔隙明显增大,对N、P有较强吸附作用,能吸附2.5%的N和37.4%的P;施用1∶10硅藻土肥的比施用化学肥料的增产9.8%,比施用化学肥料的多吸收20.4%的N,18.6%的P和12.8%的K,值得在生产上推广应用。In this paper,the observing of diatom-clay's structure and absorbing of nutrient and the effect of different ratios of diatom-clay and fertilizer on fertilizer efficiency were conducted.The results show that,there was a large quantity of holes in diatom-clay. Diatom-c1ay's holes were greatly enlarged when wetted; Diatom-clay holes could strongly absorb N and P nutrients and the amounts of absorpted N and P were 2.5% and 37.4% respectively of the total. Application of 1:10 diatom-clay's fertilizer increased dry matter yield and N,P and K uptakes of the plant by 9.8 and 20.4%,18.6 and 12.6% respectively.

关 键 词：硅藻土 化肥 施肥效果 养分吸附 养分吸附试验 生长发育 产量 

分 类 号：S147.5[农业科学—肥料学]