摘要
用三室土培技术 ,研究了钾营养效率不同的 4个小麦品种根际速效钾、缓效钾的动态变化与钾效率的关系。结果表明 ,在不施钾条件下 ,低效低响型品种京核 1号根际速效钾和缓效钾的耗竭程度较大。相反 ,高效低响型品种太核 50 2 5、低效高响型品种 6 154的根际速效钾和缓效钾的耗竭程度都较小。而中间类型品种京选偃 6的根际钾耗竭程度更小。小麦根际钾的变化与根系分泌
The depletion of potassium in the rhizosphere soil of four wheat varieties with different potassium nutrition efficiency was studied in soil culture with 3 compartment pot. The results demonstrated that both of available and non exchangeable K were highly depleted in the rhizosphere soil of Jinghe 1 which has low K efficiency and low responsiveness to K; and low depletion of available and non exchangeable occurred for Taihe 5025, a cultivar with high K efficiency and low responsiveness to K; 6154, a cultivar with low K efficiency and high responsiveness to K, and Jing xuan yan 6, a cultivar with moderate K efficiency and responsiveness to K. The relationship of K depletion in rhizosphere soil of wheat and H + excretion from the roots was also discussed.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
2000年第3期87-91,共5页
Journal of China Agricultural University
基金
国家自然科学基金重大项目 !(39790 10 0 )
博士后基金资助项目
关键词
根际
钾动态
钾营养效率
小麦
rhizoshpere
K dynamic change
K nutrition efficiency
wheat
