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《农业科学与技术(英文版)》 2010-03
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Screening Index for Low Phosphorus Tolerance at Seedling Stage

ZHANG Yan-li1,JIA Jian-hui2,ZHAO Yue-qi1,GU Si-yu3,XU Jing-gang31.Mudanjiang Normal University Biology Department,Mudanjiang 157012;2.Heilongjiang Agricultural Economy Professional Schools,Mudanjiang 157041;3.College of Resources and Environment,Northeast Agricultural University,Haerbin 150030  
[Objective] Simple and reliable identification criteria used in screening phosphorus efficiency of soybean at seedling stage was discussed.[Method] Using the high and low phosphorus soil pot experiment,the soybean seedling stage's 5 criteria including RPH,RAW,RRW,RAPC and RRPC were studied.[Result] Low phosphorus stress had the low effects on relative plant height,the coefficient of variation was only 9.07%,has not achieved the remarkable level with its its criteria's relevance;Low phosphorus stress had the higher effects on relatively above-ground dry weight and relative dry weight of root,relatively above-ground phosphorus concentration and relative root phosphorus concentration,its coefficient of variation was also big,in turn is 26.67%,22.68%,24.01% and 15.87%,The correlation coefficient among the indicators had significantly or extremely significantly positive correlation.[Conclusion] Relatively above-ground dry weight and relative dry weight of root,relatively above-ground phosphorus concentration can be used as an important indicator of comprehensive evaluation of screening phosphorus efficiency of soybean at seedling stage,while the relative root phosphorus concentration can be used as secondary screening index.
【Fund】: Supported by Foundation of Heilongjiang Provincial Department of Education“Biological Basis of the Roots from Different Soybean Genotypes Adapting to Low-phosphorus Soil”(10551033);; Scientific Research Startup Foundation for Doctor Program of Mudanjiang Normal University(MSB200912)~~
【CateGory Index】: S565.1
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