有机物料对白浆土金属氧化物形态转化和迁移的影响及其肥力效应

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．

Effect of organicmaterial on transformation and translocafion of metal oxide in albic soil and theirimpacts on soil fertility.

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.