EFFECT OF ROTATIONS, TILLAGE TREATMENTS AND FERTILIZERS ON THE AGGREGATION OF A CLAY SOIL
[摘要] Soilaggregationwaslowestinafallow-wheatrotationandincreasedinotherfallow-grainrotationswiththesecond,third,andfourthcropsafterthefallowyear.Thebestaggregationwasundercontinuouswheat.Rotationscontaininghaycrops,particularlythosewithgrass,increasedsoilaggregationsignificantly.Theinfluenceoftillagetreatmentsonsoilaggregationdeclinedwithincreaseddepth.Varioustillagetreatmentsaffectedsurfacesoilaggregation,inthefollowingorder:greenmanurecropplowedundergt;cultivatedwithtrashcovergt;cropresiduesplowedundergt;cultivatedwithresiduesburnedoff=cropresiduesdiscedin.Fertilizer(11–48–0)appliedtothewheatcropofthevarioustillagetreatmentsincreasedsoilaggregationexceptwherethecropresidueshadbeenremoved.Theapplicationofbarnmanureincreasedsoilaggregation.
[发布日期] [发布机构]
[效力级别] [学科分类] 农业科学（综合）
[关键词] [时效性]
