Screening Index for Low Phosphorus Tolerance at Seedling Stage  

大豆苗期耐低磷筛选指标的研究(摘要)(英文)

作　　者：张彦丽[1] 贾健辉[2] 赵月琪[1] 谷思玉[3] 许景钢[3] 

机构地区：[1]牡丹江师范学院生物系,黑龙江牡丹江157012 [2]黑龙江农业经济职业学院,黑龙江牡丹江157041 [3]东北农业大学资源与环境学院,黑龙江哈尔滨150030

出　　处：《Agricultural Science & Technology》2010年第3期87-89,97,共4页农业科学与技术（英文版）

基　　金：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)~~

摘　　要：[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.[目的]探讨简单、可靠的用于大豆苗期磷效率筛选的鉴定指标。[方法]采用高、低磷土壤盆栽试验:①高磷(CK)。施过磷酸钙3.03 g/kg土,尿素[CO(NH2)2]0.075 g/kg土,硫酸钾(K2SO4)0.075 g/kg土;②低磷。只施氮、钾肥,不施磷肥。对大豆苗期的相对株高(RPH)、相对地上部干重(RAW)、相对根系干重(RRW)、相对地上部磷浓度(RAPC)和相对根部磷浓度(RRPC)5个指标进行测定。[结果]相对株高受低磷胁迫影响较小,变异系数仅为9.07%,与其他指标的相关性未达到显著水平;相对地上部干重、相对根部干重、相对地上部磷浓度和相对根部磷浓度受低磷胁迫的影响较大,其变异系数也较大,其顺序为:相对根部干重(26.67%) >相对地上部干重(22.68%) >相对地上部磷浓度(24.015) >相对根部磷浓度(15.87%),各指标间的相关系数呈显著或极显著正相关。[结论]相对地上部干重、相对根部干重和相对地上部磷浓度可以作为综合评价大豆苗期磷效率筛选的重要指标,相对根部磷浓度可以作为辅助筛选指标。

关 键 词：SOYBEAN Low phosphorus stress Screening criteria 

分 类 号：S565.1[农业科学—作物学]