论文部分内容阅读
在低磷红壤上，对原产广东省的大豆（Glycinemax（L．）Merrill）基因型磷效率与其来源地土壤有效磷含量的关系进行研究。结果表明：植株磷素吸收量相对值（RVPPU）不仅可以反映大豆对低磷红壤生长适应性，而且可以反映大豆基因型磷效率特性，RVPPU是衡量田间生长适应性和磷效率特性的较好指标。RVPPU较大的大豆基因型，其对低有效磷红壤环境适应性较好，磷效率特性较佳；反之，亦然。不同大豆基因型，具有不同的磷效率特性。磷效率特性的形成与土壤有效磷含量有关。土壤中低有效磷含量与较佳的磷效率特性形成有关，长期生长在有效磷含量较低的砖红壤、赤红壤、红壤和紫色土上的大豆基因型具有较佳的磷效率特性；而长期生长在有效磷含量较高的水稻上、潮土上的大豆基因型其磷效率特性较差。大豆基因型较佳的磷效率特性是其长期在低有效磷土壤环境下进化形成的。
In low phosphorus red soil, the relationship between genotype phosphorus efficiency of soybean (Glycine max (L.) Merrill) originating in Guangdong Province and soil available P content in the source area was studied. The results showed that the relative value of plant P uptake (RVPPU) could not only reflect the adaptability of soybean to the growth of low-P red soil, but also reflect the characteristics of soybean genotype P efficiency. RVPPU is a good indicator to measure the growth adaptability and P efficiency . The larger soybean genotype with RVPPU had better adaptability to low-available phosphorus red soil environment and better phosphorus efficiency, and vice versa. Different soybean genotypes have different phosphorus efficiency characteristics. The formation of phosphorus efficiency characteristics and soil available phosphorus content. The content of low available phosphorus in soil was related to the formation of better P efficiency characteristics. The genotypes of soybean that grew for a long time in brick red soil, latosolic soil, red soil and purple soil with lower available P had better P efficiency. Soybean genotypes grown on alluvial soils with poorer available phosphorus had poorer phosphorus efficiency. The preferred phosphorus efficiency of the soybean genotype is its long-term evolution in the low available phosphorus soil environment.