摘要
在河北省大曹庄农场机械化和喷灌生产条件下 ,研究了冬小麦植株体内氮、磷、钾的时空分配特点。结果表明 ,在 750 0kg hm2 以上 ( 760 0～ 9450kg hm2 )的产量水平下 ,拔节期以前 ,氮、磷、钾均以在叶片和叶鞘中分配较多 ,生育后期氮和磷逐渐向子粒集中 ,成熟时子粒集中了全株 70 %的氮和 90 %的磷 ,而钾则主要集中在营养器官中。研究中就各生育时期小麦植株的养分含量在营养诊断中的意义和特点进行了讨论。
The properties of spatial and temporal distribution of nitrogen,phosphorus and potassium in winter wheat were studied under the production conditions with mechanization and sprinkling irrigation on Dacaozhuang Farm of Hebei Province.The results showed that,at the grain yield level of more than 7 500 kg/hm^2(7 600～9 450 kg/hm^2),a large portion of nitrogen,phosphorus and potassium were distributed in leaf blades and sheaths before stem elongation stage.In late growing period,however,both nitrogen and phosphorus were gradually distributed to grains,and at maturity 70% of nitrogen and 90% of phosphorus of the whole plants were concentrated in grains,but potassium was mainly in the vegetative organs.In addition,the meanings and properties of nitrogen,phosphorus and potassium contents in wheat plants at various growing stages were discussed in the sense of nutrient diagnosis.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
2002年第3期1-5,共5页
Journal of Hebei Agricultural University
基金
河北省科技计划重点招标项目
"小麦 -玉米一体化超高产技术体系研究及示范" ( 96 2 2 0 1 1 2D)
关键词
喷灌
冬小麦
植株
氮
磷
钾
时空分配
winter wheat
nitrogen
phosphorus
potassium
distribution
