摘要
试验结果表明，影响安徽省土壤有效钼含量的因素主要有：（１）成土母质的影响：硅质页岩和湖积物发育的土壤有效铂含量最高，其平均值分别为０．１７６和０．１５７ｕｇ／ｇ；而黄土沉积物、黄土古河（湖）沉积物及紫色砂岩发育的土壤有效钼含量最低，平均为０．。００５一０．０７０ｕｇ／ｇ，此类母质发育的土壤有９０％的有效钼都在临界值０．１５ｕｇ／ｇ以下。（２）水、旱种植不同的影响：统计了１４０个种植水稻的水稻土壤有效钼含量一般都在０．１５ｕｇ／ｇ上下；而８１个种旱作物的旱地土壤有效铝都在０．１００ｕｇ／ｇ以下。（３）水稻土亚类间水湿程度的影响：受水湿影响越深土壤有效钼含量越趋于增加，一般潜育型水稻土平均高于潴育型、渗育型和淹育型。（４）施磷的影响：在一定的施磷水平下，土壤有效钼及作物体内钼的含量均有增加；而施磷过量会产生反效果；磷对土壤有效钼含量的影响程度是因土类不同而异。（５）种植作物会引起土壤有效钼的亏损，但部分可用秸杆还田来弥补。
actors
related to the content of available Mo in soils of Anhui Province wereinvestigated.Soils derived
frorn siliceous shale and lacustrine sediments had the highestavailable Mo content,averaging
0.176 and 0.157 Pglg respectively,soils frorn theinundated deposits of tlie Yellow River, loess
fossil lake deposits and purple sandstones had the lowest available Mo content, averaging
0.005-0.070 ug/g,with 90%of the soils below the critical value of 0.150ug/g soil.Available Mo
content of 140 paddy soils were about 0.150 ug/g,but those of 81upland soils below
0.1001ug/g.Variation of Mo content were found among variouspaddy soil types. Gleyed paddy
soils containedapparently more available Mo thanother paddy soils.The effect of P addition on
soil available Mo content varied with the P rate,soil type, time,and cropping system.The
shortage of soil available Mo due to long-term cropping was a seriousproblem in the
agricultural production of Anhui Province, though it could be partlysupplemented by returning
crop residue to the fields.Extra fertilization of Mois needed.
出处
《土壤学报》
CAS
CSCD
北大核心
1994年第2期153-160,共8页
Acta Pedologica Sinica
关键词
土壤
有效钼
成土母质
影响因素
Soil available Mo, Parent
nzaterial,Upland and paddy soils,P-fertilization,soil molybdenum consuinption
