作　　者： ; ; ; ;

机构地区： 中国热带农业科学院南亚热带作物研究所

出　　处： 《广东农业科学》 2007年第7期50-53,共4页

摘　　要： 通过常磷和缺磷溶液培养,对8个不同基因型澳洲坚果的生长情况和吸收利用磷营养的特性进行了研究,探讨了不同基因型澳洲坚果对磷胁迫反应的差异。结果表明,不同基因型澳洲坚果对可溶性磷的吸收能力存在差异,吸收的磷量可达到自身固有磷量的12.28%～77.78%;H2、246、Oc和800等基因型植株的根、地上部以及单株鲜重和干重均表现出受磷胁迫影响较大的特点;在缺磷条件下,H2基因型植株的磷生物利用率下降(仅为常磷处理的93.80%),其他基因型均有所上升,尤其是246和Oc基因型植株的磷生物利用率分别为常磷处理的184.38%和141.67%,说明H2、246和Oc等3个基因型对磷胁迫比较敏感。 The growth situation and phosphorus nutrition of 8 macadamia genotypes were studied by normal phosphorus and low phosphorus in solution culture , as well as the variation of different genotypes to phosphorus stress. The results were as follows： The ability of different genotypes to absorb soluble phosphorus from nutrition solution was different. The amount of phosphorus uptaken by plant was about 12.28%-77.78% of total phosphorus content. The phosphorus stress had a greater effect on the plant fresh weight and dry weight of H2, 246, Oc, 800 than other genotypes. Under phosphorus stress, the phosphorus efficiency of H2 decreased and the others increased, especially the phosphorus efficiency of 246 and Oc were up to 184.38% and 141.67% of the control, respectively. Therefore, it＇s obvious that H2, 246 and Oc were more sensitive to phosphorus stress.

关 键 词： 澳洲坚果 磷胁迫 基因型差异

领　　域： [农业科学] [农业科学]