Abstract

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Title:: Phosphorus Uptake and Accumulation in Soybeans with Different Maturity

Author(s):: GUO Xuan; GONG Zhen-ping; MA Chun-mei; YAN Shuang-shuang; LI Xian-wei; GAO Yang; (Agronomy College,Northeast Agricultural University,Harbin 150030,China)

Abstract:: Three soybean cultivars with different maturity,Heihe 43(early mature),Suinong 28(middle mature)and Heinong 51(late mature),were pot planted under phosphorus levels of 10 mg·kg^-1(P10)and 33 mg·kg^-1(P33).The dynamics,absorption and allocation of phosphorus in different organs as well as soybean yield components were determined to apply P fertilizer reasonably.Under P10 level,except that in petioles of Heihe 43,P content in each organ of three cultivars all presented a single-peak curve.Under P33 level,with the process of growth period,P content in leaves of Suinong 28 decreased,while that in Heihe 43 and Heinong 51 showed a single-peak curve;P content in pods of Heihe 43 and Suinong 28 increased since R5,while that in Heinong 51decreased.Plant dry matter and P accumulation in P33 both higher than P10.From V3 to R5,the P allocation in descending order were leaf,pod,root,stem and petiole.More P partitioned into pods at R8.Seed yield of Heihe 43,Suinong 28 and Heinong 51 under P33 increased by 2.1%,9.5% and 7.2%,respectively, compared to P10.Results suggest the yield-increasing effect of higher soil P content to mid-late mature soybeans is superior to that of early mature ones.