Phosphorus Accumulation and Phosphorus Fraction in High Phosphorus Soil of Two Different P-efficiency Wheat Genotypes (Tritium aestivum L.)
A rhizobox experiment was empolyed to study root biomass,phosphorus (P) accumulation of two different P efficiency and P fraction on alluvial soil (available P,17.79mg· kg-1) under P levels of 0,25,and 50mg· kg-1).Xiaoyan 54 (P-efficient) and Jing 411 (P-inefficient) were selected in the experiment.Application of P fertilizer could increase P accumulation of two kinds of wheat and biomass of Jing411.The highest biomass of Xiaoyan54 was obtained by P25.Under soil treatments of non-P and 25 mg P· kg-1,the biomass and P accumulation of Xiaoyan54 was higher than Jing411.The root biomass of Xiaoyan 54 has 87％ and 56％ higher respectively than Jing 411,and the total P accumulation were 40.2％ and 39.7％ higher at P0 and P25.The contents of different forms of inorganic phosphorus on alluvial soil followed the order of Ca10-P ＞ Ca8-P ＞ Al-P ＞ Ca2-P ＞ Fe-P.The two kinds of wheat mainly used Ca2-P,Fe-P and Ca8-P of rhizosphere.Organic phosphorus contents was moderate labile organic P ＞ high stable organic P ＞ moderately stable organic P ＞ active organic P.No significant differences were found between Xiaoyan54 and Jing411 under the five forms of inorganic phosphorus,so does the active organic phosphorus,moderately stable organic phosphorus and high stable organic P.The uptake of moderate labile organic P of Xiaoyan54 under no P application was higher than Jing411,which was opposite to 50mg P· kg-1 soil treatment.P fertilizer applied properly was benefit to improvement of biomass and P accumulation of wheat.The two genotypes of wheat mainly used Ca2-P,Fe-P and Ca8-P.Xiaoyan54 had better ability of uptaking moderate labile organic P than Jing411 of rhizosphere.Two kinds of wheat in different P efficiency do not express significant difference in high P alluvial soil.
High phosphorusPhosphorus efficiencyPhosphorus fractionWheatRhizosphere
国家科技期刊平台
NSTL
万方数据
维普
