菜园土肥力特征及蔬菜硝酸盐污染的控制技术 Ⅴ.长沙市几个专业蔬菜基地土壤有机磷形态分级及其与土壤有效磷的关系  

Study on the Fertility of Vegetable Soil and Technique for Controlling Pollution of Nitrate in Vegetable Crops Ⅴ.Organic PFractions in Garden Soils in the Suburb of Changsha City and Their Relationships with Available P Content

作　　者：黄启为[1] 王翠红[1] 冯跃华[1] 蒋志强[1] 张杨珠[1] 

机构地区：[1]湖南农业大学资源环境学院,湖南长沙410128

出　　处：《湖南农业大学学报（自然科学版）》2004年第6期562-564,共3页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：湖南省重点科技攻关项目(02SSY3033).

摘　　要：为探明菜园土有机磷形态与其磷素肥力的关系,以长沙市郊区主要菜园土为材料,对其土壤进行了有机磷形态分级.结果表明:长沙市主要菜园土耕作层有机磷总量为(255.0±71.7) mg/kg,约占土壤全磷含量的 19%.在有机磷组分中,以中活性有机磷为主,约占有机磷总量的 60%,活性有机磷含量最低,仅占有机磷总量的 5%左右,中稳性有机磷和高稳性有机磷的含量介于其间,不同组分有机磷含量都随土壤剖面深度的增加而减少.在土壤不同形态的有机磷中,活性有机磷和中活性有机磷含量均与土壤有效磷含量之间呈极显著正相关,是土壤有效磷的重要来源.The organic phosphorus(P)fractionation in garden soil in changsha city were studied.Results showed that total organic P in plough layer of garden soil in changsha city was (255.0±71.7) mg/kg,which takes about 19 percent of the contents of total P.In the total contents of organic P forms,moderately labile organic phosphorus (MLOP) was the main organic P form which accounts for 60 percent of organic P.Labile organic phosphorus (LOP) was the smallest part in these forms,which takes about only 5 percent.The contents of moderately resistant organic phosphorus (MROP) and highly resistant organic phosphorus (HROP) were between that of MLOP and LOP.All of the organic P forms gradually reduced with the increase of the depth in the tested soils profiles.LOP,MLOP were positively correlated with the soil available P and the soil organic matter at significant level.

关 键 词：菜园土 土壤有机磷形态 分级 有效磷 长沙市 

分 类 号：S158.3[农业科学—土壤学]