摘要
在低K^+、添加K^+通道抑制剂以及5种pH值(4．5、5．5、6．5、7．5、8．5)的条件下,采用水培法研究大豆、小麦根系对K^+吸收及其与吸收液中H^+浓度的关系。结果表明:溶液pH值对作物K^+的吸收有明显的影响,高pH值有利于大豆对K^+的吸收,不利于小麦对K^+的吸收;作物吸收的K^+最终会引起溶液中H^+浓度的增加。K^+吸收量与H^+分泌量之比不是定值,它随溶液pH值的变化而变化,该比值大豆小于小麦;NH_4^+可降低作物对K^+的吸收速率,就小麦而言,pH值对NH_4^+减少K^+吸收的影响更为强烈。
Solution culture experiments were carried out to study the relationship of K^＋ uptake by soybean and wheat and the H^＋ concentration changes with application of ion channel inhibitor TEA under the condition of low K^＋ concentration and five different pH levels. The results were as follows： pH influenced the uptake of K^＋ by crops, but the effects were different for soybean and wheat. High pH promoted the uptake of K^＋ by soybean but reduced the uptake of K^＋ by wheat; The uptake of K^＋ by crops caused the increase of H^＋ concentration in outer solution, but the ratio of K^＋ uptake and H^＋ release varied with pH, implicating no fixed value for the ratio. The ratio for soybean was lower than that for wheat; Ammonium reduced the uptake of K^＋ by crops. As for wheat, the effect of pH on NH4^＋ lessening K^＋ uptake was greater.
出处
《扬州大学学报（农业与生命科学版）》
CAS
CSCD
北大核心
2006年第4期74-77,共4页
Journal of Yangzhou University：Agricultural and Life Science Edition
基金
国家自然科学基金(30270783)
扬州大学自然科学基金(SK0313097)
关键词
作物
pH
钾吸收
铵离子
crop
pH
potassium uptake
ammonium
