摘要
对定位施肥的棕壤土壤无机磷形态分级的研究结果表明 :长期无磷素投入的N、CK区 ,Ca10 -P含量下降了约 2 5 % ,而O -P下降了 11.6 %～ 30 % ,施肥后 ,土壤中无机磷的增量主要是形成Fe -P和Al-P ,其次对有机肥中的磷是形成Ca8-P和Ca2 -P。连续 14年的高量有机肥和磷肥配施 ,使土壤各形态无机磷占全磷比例的先后顺序发生了很大的变化 ,其比例由大到小依次为 :Fe -P(2 2 .76 % )、O -P(14.6 % )、Al -P(12 .49% )、Ca10 -P(9.13 % )、Ca8-P(7.99% )、Ca2 -P(6 .5 8% ) ,而原始土壤中则是 :O -P(2 4.2 1% ) ,Ca10 -P、Fe-P(17.87% ,16 .6 8% ) ,Al-P、Ca8-P(1.71% ,1.5 7% ) ,Ca2 -P(0 .2 3 % )。
The long term experimental study on forms of inorganic phosphorus in Brown Soil showed that the contents of Ca 10 -P and O-P in N and check treatment plots decreased gradually,and the content of Ca 10 -P decreased about 25 percentage,and O-P decreased 11.6～30 percentage 14 years later. The increment in soil inorganic phosphorus caused by fertilization mainly shifted to Fe-P and Al-P. The sencond large proportion shifted from organic fertilization were Ca 8-P and Ca 2-P. The sequences of the rations of different forms to soil total P changed greatly after 14 years application of organic and phosphatic fertilizer,namely,Fe-P(22.76%)>O-P(14.6%)>Al-P(12.49%)>Ca 10 -P(9.13%)>Ca 8-P(7.99%)>Ca 2-P(6.58%). However,in the primary soil,the sequences were observed that O-P(24.21%)>Ca 10 -P、Fe-P(17.87%,16.68%)>Al-P、Ca 8-P(1.71%,1.57%)>Ca 2-P(0.23%).
出处
《辽宁农业科学》
2001年第1期4-7,共4页
Liaoning Agricultural Sciences
关键词
棕壤
长期定位施肥
无机磷形态
磷肥
有机肥
有
brown soil,long term fertilization experiment,soil inorganic phosphorus forms,proportion,phosphate fertilizer,organic fertiliD
