生态环境学报2011，Vol.20Issue(10)：1454-1460,7.
不同紫云英基因型对难溶性磷吸收利用的影响
Effects of different genotypes ofAstragalus sinicus on uptake and utilization of sparingly soluble phosphorus
摘要
Abstract
A Sand pot incubation experiment was carried out to study the effects of different genotypes on the uptake and utilization of insoluble soluble phosphate (Al-P and Fe-P) by Chinese milk vetch (Astragalus sinicus). The results indicated that the growth characteristics, plant biomass and P uptake of different parts varied greatly with different P sources. Plant height, stem diameter, branch number all appeared as K-P > Al-P > Fe-P > CK, and significant difference was observed between two kinds of insoluble phosphate. For most genotypes of the Chinese milk vetch, Al-P was significantly higher than Fe-P in aboveground, underground and total fresh and dry weights, implying that Al-P could be assimilated by Chinese milk vetch in a easier way. The uptake of insoluble phosphate by No. 6 Minzi and No. 1 Minzi were higher than Yu Jiang Daye and Yi Jiang zi. Aboveground, underground and total P uptake of all genotypes appeared as K-P > Al-P > Fe-P > CK. No. 6 Minzi and No. 1 Minzi had greater capacity of uptaking and utilizing insoluble P, than the other three species. According to the relationship between plant P uptake and biomass, P uptake was positively correlated with the plant biomass. The regression between total dry weight and total P uptake was significant in CK and Al-P treatments, not significant in K-P and Fe-P treatments, indicating that the absorption of Al-P in was greater than Fe-P in the utilization of insoluble phosphate by Chinese milk vetch.关键词
紫云英/砂培/难溶性磷/吸收Key words
Astragalus sinicus/sand pot experiment/sparingly soluble phosphorus/uptake分类
农业科技引用本文复制引用
兰忠明,张辉,吴一群,林新坚..不同紫云英基因型对难溶性磷吸收利用的影响[J].生态环境学报,2011,20(10):1454-1460,7.基金项目
公益性行业(农业)科研专项(201103005) （农业）
福建省自然科学基金(2010J01104) （2010J01104）
福建省财政专项"福建省农业科学科技创新团队建设基金"(STIF-Y01) （STIF-Y01）
