摘要
通过土柱淋溶试验研究了牧草粉腐解物对白浆土Ｆｅ、Ｍｎ、Ａｌ氧化物形态转化及剖面迁移的影响及其对土壤Ｐ素形态转化和有效性的影响．结果表明，加有机物料淋溶使土壤ＤＴＰＡ提取态或有机络合Ｆｅ、Ｍｎ、Ａｌ氧化物含量显著上升；有效磷含量也极显著上升，主要在于铝磷和铁磷含量的增加；白浆层土壤中有效态磷及无机磷各形态均随着腐熟牧草粉用量的加大而极显著地升高，表层土壤中有效态磷、铝磷、铁磷的变化也与加入的腐熟牧草粉极显著正相关．土壤有效态磷、铝磷、铁磷与ＤＴＰＡ提取态和有机络合态Ｆｅ、Ｍｎ显著或极显著相关，但在表层土壤磷素各形态与ＤＴＰＡ及焦磷酸钠提取的Ａｌ呈极显著负相关，而白浆层却是极显著正相关．
Soil column experiment showed that in albic
soil,DTPA or organochelated Fe, Mn and Al were significantly increased when decayed alfalfa
powder was added. Soil available P was also enhanced,mainly due to the increase of soil
aluminum and iron combined P (P Al and P Fe).In albic layer,soil available P and four forms of
inorganic P were all significantly positively correlated to the amount of added alfalfa
powder,while in surface layer, only available P,P Al and P Fe were significantly positively
correlated to the dose of organic material. Soil available P,P Al and P Fe were significantly
correlated to DTPA or organo chelated Fe,Mn.The difference was in surface layer,their
relationships were negative,while in albic layer, they were positive.
出处
《应用生态学报》
CAS
CSCD
1999年第4期423-426,共4页
Chinese Journal of Applied Ecology
基金
国家"八五"科技攻关项目
关键词
有机物料
金属氧化物
白浆土
肥力
Organic
material, Oxide, Phosphorus, Albic soil.
