应用^(32)P对冬小麦返青期追磷吸收利用规律的研究  

Studies on the rule of winter wheat absorption and utilization of phosphorus fertilizer at spring regreening stage using phosphorus-32 tracer

作　　者：杨太新[1] 李雁鸣[1] 张立言[1] 刘树欣[1] 

机构地区：[1]河北农业大学农学院,河北保定071001

出　　处：《河北农业大学学报》2000年第1期5-8,共4页Journal of Hebei Agricultural University

基　　金：河北省科委重点项目!"白洋淀周边脱盐化潮土区水土资源高效利用商品农业综合利用技术体系的研究"部分内容 (91 2 2 0 1 2 0 )

摘　　要：应用3 2 P示踪技术 ,在高、低磷土壤条件下 ,对冬小麦返青期追磷后吸收利用的规律进行了研究。结果表明 :在返青期追施磷素的情况下 ,小麦所需的磷素 ,在低磷土壤上 82 .78%来自肥料 ,高磷土壤上 70 .5 4%来自土壤 ;高、低磷土壤上磷肥的当季利用率分别为 1 3.40 %和 2 3.2 8%Under rich and poor phosphorus soil conditions, the rule of winter wheat absorption and utilization of phosphorus fertilizer at spring regreening stage was studied by means of phosphorus-32 tracing technique.The results were that: On poor phosphorus soil, 82.78% of phosphorus in wheat plants were derived from fertilizer phosphorus; On rich phosphorus soil, 70.54% of phosphorus in wheat plants were derived from soil phosphorus.During the growing season, the utilization percentage of fertilizer phosphorus fertilizeed at spring regreening stage were 23.28% on poor and 13.40% on rich phosphorus soil, respectively.

关 键 词：冬小麦 P32 肥料磷素 土壤磷素 追肥 磷肥 

分 类 号：S512.106.2[农业科学—作物学] S124.2