大豆磷效率与形态生理性状的关系

Studies on Characteristics of Phosphorus Efficiency of Soybean Genotypes and Relationship between Those and Some Morphological , Physiological Traits

有关低磷红壤上大豆 ( Glycinemax ( L.) Merrill)基因型磷效率特性的研究鲜见报到 .作者选用低磷红壤耕地上生长适应性不同的 1 9个广东大豆地方种质 ,采用低磷红壤盆栽方法 ,对大豆基因型磷效率特性及其与植株形态生理性状的关系进行了研究 .结果表明 :在低磷水平下 ,较之磷效率特性较差的大豆基因型 ,磷效率特性较好的大豆基因型表现出体内磷素的相对积累和体内磷素转化为干生物量的效率的相对减弱 ;不同植株形态生理性状与大豆基因型磷效率特性呈现不同程度的相关 ,植株冠部磷素吸收量相对值与大豆基因型磷效率特性关系密切 。

Studies on characteristics of phosphorus efficiency of 19 native soybean genotypes in Guangdong and relationship between those and some morphological , physiological features were conducted by means of soil pots in this paper.The results are as follows: (1) Under low phosphorus treatment, soybean genotypes which have better characteristics of phosphorus efficiency have higher phosphorus uptake (i e higher RVPPU)and lower phosphorus efficiency ratio (i e lower RVPPER);those with worse characteristics of phosphorus efficiency are vice versa. (2) The correlation analyses indicate that Relative Value of Shoot Phosphorus Uptake (RVSPU) has close correlation with characteristics of phosphorus efficiency of soybean genotypes, it can be used as an important index explaining characteristics of phosphorus efficiency of soybean genotypes.