富钾植物籽粒苋(Amaranthus spp.)对土壤矿物钾的吸收利用研究  

UPTAKE OF POTASSIUM IN SOIL AND MINERAL BY GRAIN AMARANTH (Amaranthus spp.)

作　　者：周明[1] 涂书新[2] 孙锦荷[3] 郭智芬[1] 

机构地区：[1]湖北省农业科学院辐照加工研究所,湖北武汉430064 [2]华中农业大学资源与环境学院,湖北武汉430070 [3]浙江大学原子核应用研究所,杭州310029

出　　处：《核农学报》2005年第4期291-296,共6页Journal of Nuclear Agricultural Sciences

基　　金：国家自然科学基金(29777021);农业部核农学重点实验室(浙江大学)开放基金

摘　　要：运用土培、石英砂培、有机酸释钾实验及矿物X衍射分析研究了不同基因型籽粒苋(Amaranthusspp.)对土壤矿物钾的吸收利用及其机制。结果表明,籽粒苋能有效地利用土壤和云母(黑云母和金云母)中的钾;籽粒苋品种R104、CX4对钾的吸收量高于一般型品种(CX77);籽粒苋根系能引起云母矿物向蛭石转化;籽粒苋根系分泌物中的草酸比一般有机酸具有更高的释放矿物中钾素的能力。Potassium uptake and its mechanism from soil and minerals by various genotypes of grain amaranth （Amaranthus spp, ） were studied by soil pot experiment, quartz cultivation experiment and batch mica-K release experiments by organic acids as well as mineral X-ray diffraction analysis. The results showed that grain amaranth could efficiently take up K from both soil and micas （biotite and phlogopite）. Genotypes of R104 and CX-4 took up more K than CX-77. Roots of grain amaranth stimulated transformation of mica to vermiculite. The oxalic acid from the root exudates of grain amaranth was able to release greater K from K-bearing minerals than other common organic acids.

关 键 词：籽粒苋 富钾植物 矿物钾 有机酸 草酸 吸收利用 SPP 利用研究 土壤 根系分泌物 

分 类 号：S519[农业科学—作物学]