潜育性和次生潜育化水稻土的形成及改良途径的研究总结报告  

STUDY ON THE FORMATION AND AMELIORATION OF ORIGINAL AND SECONDARY GLEIZATION OF PADDY SOIL

作　　者：中国科学院长沙农业现代化研究所潜育性水稻土改良课题协作组 

出　　处：《农业现代化研究》1984年第6期5-25,共21页Research of Agricultural Modernization

摘　　要：一、潜育性和次生潜育化水稻土的形成和类型 (一)问题的提出 (二)潜育性水稻土的形成 (三)潜育性水稻土的类型 二、潜育性水稻土的性质 (一)潜育性水稻土的物理性质 (二)潜育性水稻土的化学性质 (三)潜育性水稻土的养分特性 (四)<Abstracy>This study was done from 1979 to 1984.Main results of the study are su-mmarized as follows:I.The formation of gleization of paddy soil Factors inducing soil gleization are rather complicated.The main cause is poor permeabilith,especially in the plowpan layet where its poroisty is low.The level of ground-water,distance of rice field to the irrigation ditch, the occurrence of sandy and clay horizon in the soil profile also affect the permeability of soil.Soil gleization is also affected by the environmental conditions.The first one is poor drainage,expecially under irrigation.The second is improper cul-tivation system such as the adoption of doudle cropping rice,which may pro-long waterlogging period. The third is shallow ploughing,which may thicken the plowpan.under the conditions mention above,secondary gleization may take place readily on most paddy soils with poor permeability. Ⅱ.Types of gleying paddy soils According to redox status,expecia-lly the position of gleying horizon and structure of soil profile,we divided the gleization of paddy soin into six types:1.Snrface layer gleying.The fea-ture paddy soil profile is ag p b bc or ag pg b bc;2 plowpan gleying.this is the main type of secondary gleization of paddy soil. the feature of soil profile a pg b c(g);3 interlayer gleying. there is anon-permeable stratum between the surface layer and subsoil .the feature of soil profile is a pg b g or ag pg w g;4 upper part aleying. the glcying layer appears below plow layer or plowpan.the feature of soil profile is a p g;5.whole profile (or swanpy)gleying .the feature of soil profile is ag g or ag g ;6.lower part gleying .gleying layer below surface 50 cm.the feature of soil profile is a p b g. the chearacteristics of gleying paddy soil the gleying paddy soils,especially he gleying layer are almost waterlogg ing .the permeability of soil is very poor.it is under strongly reducing con dition,even in the season under upland crop,the redox porential is below 200 mv,all of thexe factors are rearding the

关 键 词：潜育性水稻土 潜育性稻田 潜育化水稻土 黄泥田 还原物质 青泥 改良途径 犁底层 桃源县 潮泥 

分 类 号：S[农业科学]