低磷胁迫下箭筈豌豆和毛叶苕子根际过程的差异比较

采用我国北方两个豆科绿肥品种: 箭筈豌豆（Vicia sativa L.）与毛叶苕子（Vicia villosa Roth），在控制条件下通过不同供磷处理的营养液培养，研究了不同绿肥作物适应低磷胁迫根际过程的差异，并揭示其高效利用磷的机理。试验通过分次取样的方法，测定了两种豆科作物在缺磷与供磷条件下的生物量、根系质子释放速率、根系有机酸分泌速率以及根表酸性磷酸酶活性的动态。结果表明，箭筈豌豆与毛叶苕子在生长前期对低磷胁迫的响应存在明显差异。箭筈豌豆主要靠增大质子释放量和提高酸性磷酸酶活性来适应低磷胁迫; 而毛叶苕子主要通过提高根冠比、扩大根系生物量来对外界环境中的缺磷状况做出响应，在缺磷时其根表酸性磷酸酶的活性显著提高。箭筈豌豆与毛叶苕子可通过协调根系形态和生理的适应性变化提高对磷的吸收。

Comparison of rhizosphere processes of Vicia sativa and Vicia villosa in response to phosphorus deficiency

China is rich in leguminous green manure resources,but the rhizosphere processes-based mechanisms of efficient nutrient acquisition and use were not fully understood.A pot experiment with hydroponics was conducted under a controlled condition in a growth chamber by adopting two popular green manure species,Vicia sativa L.and Vicia villosa Roth.,in the North China to compare the difference in rhizosphere processes of these two legume species in association with their adaptation mechanisms to the phosphorus(P...