冬小麦—夏玉米轮作体系中磷素平衡的研究  

Research of Phosphorus Balance in Rotation System of Winter Wheat and Summer Maize

作　　者：刘晶晶[1] 李同杰 由文颖[1] 

机构地区：[1]潍坊工程职业学院,山东青州262500 [2]青州市花卉产业管理局,山东青州262500

出　　处：《山东农业科学》2011年第8期71-74,共4页Shandong Agricultural Sciences

基　　金：国家"948"重大项目(2003-Z53)

摘　　要：大田试验研究了高产粮田冬小麦-夏玉米轮作体系中磷素的来源、利用、去向及在土壤中的累积数量。结果表明,磷肥施用和秸秆还田是土壤磷素的主要来源,施肥占63.01%～77.77%,秸秆还田占12.83%～20.75%。籽粒输出的磷占作物磷总输出量的55%左右。全量秸秆还田的情况下,年施磷56 kg/hm2即可维持土壤磷素平衡,秸秆不还田情况下则需施磷86 kg/hm2才能维持土壤磷素平衡。The experiment was carried out to study the origin, utilization and accumulation of phosphorus in soil of high - production grain field with the rotation system of winter wheat and summer maize. The conclusions were as followed. Chemical phosphate fertilization and straw returning were the main sources of phos-phorus, and that from fertilization accounted for 63. 01%- 77.77% ,while that from straw returning accounted for 12. 83% -20. 75%. The output of phosphorus to grains was about 55% of the total output. Under the condition of all straw returning ,fertilizing 56 kg/hm^2 phosphorus every year could maintain the phosphorus balance in soil, while 86 kg/hm^2 phosphorus fertilizer was needed under the condition of without straw returning.

关 键 词：高产良田 磷素平衡 

分 类 号：S344.13[农业科学—作物栽培与耕作技术]