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本研究以小麦磷效率典型基因型为材料,以磷酸三钙为磷源,以水平分根(同时又是相态分根)试验为基本方法研究了小麦对难溶态磷酸盐的活化、吸收机理.当磷酸三钙置于营养液时,磷高效基因型洛夫林10号的吸钙量为磷低效基因型,“中国春”和80-55的2.7和3.6倍.其磷素净活化、吸收量分别较之高30%和77%.当磷酸三钙置于石英砂中时,两类基因型对钙的吸收或对磷的活化、积累保持着类似的趋势.在这种情况下,“中国春”和80-55都不能完成其生活史,而洛夫林10号则能开花结实.说明大量吸收相伴阳离子,主动活化难溶态磷酸盐是小麦磷高效基因型的基本特点.
In this study, wheat genotypes of phosphorus efficiency as a material, the use of tricalcium phosphate as a source of phosphorus, the level of root (at the same time phase rooting) test as a basic method of wheat on the insoluble phosphate activation, absorption Mechanism.When calcium phosphate tricalcium was placed in the nutrient solution, the phosphorus-efficient genotype Lovrin 10 had a calcium-inefficient genotype of phosphorus, 2.7 and 3.6 times that of the Chinese Spring and 80-55, , Respectively, up to 30% and 77% respectively.When the tribasic calcium phosphate was placed in quartz sand, the two types of genotypes maintained a similar tendency to absorb calcium or to activate and accumulate phosphorus, in this case , “Spring of China” and 80-55 can not complete their life history, while Lovrin No. 10 can flowering and fruiting stably, indicating that absorbing large quantities of accompanying cations and active activation of hardly-soluble phosphates are the basic characteristics of the phosphorus-efficient genotypes of wheat.