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《Shandong Agricultural Sciences》 2009-02
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Study on Phosphorus Supplying Characteristics of High-yielding Field with Fluvo-aquic Soil in Shandong Province

LIU Ji-yong1,CHEN Wen2,LIU Bo3,WANG Jian4,MENG Qing-hua1 (1.Shandong Cotton Research Center,Jinan 250100,China;2.Renfeng Agrotechnical Station of Jiyang County,Jiyang 251414,China;3.Anqiu Agricultural Bureau,Anqiu 262100,China;4.Shandong Provincial Soil and Fertilizer Station,Jinan 250100,China)  
In the surface of fluvo-aquic soil in Shandong Province,the inorganic P was the main form of total P,Ca-P was the main form of inorganic P,Ca10-P was the main form of Ca-P,and MLOP was the main form of organic P.The grey relational analysis results showed that Ca2-P,Al-P,Ca8-P and LOP were the more available P forms in fluvo-aquic soil.The adsorption and fixation systems in fluvo-aquic soil were mainly controlled by clay(P0.01) and CaCO3,but the releasing system was mainly affected by clay(P0.01).The dominant phosphatase was the alkaline phosphatase.The amount of organic P-solubilizing bacteria was larger than that of inorganic P-solubilizing bacteria,so the intensity of organic P-translation was higher than that of inorganic P-translation.Compared with the middle-and low-yielding field,high-yielding field had the significantly higher contents of available P,slow releasing P and Ca2-P(P0.01),significantly higher contents of organic matter,Al-P and P supplying intensity(P0.05),higher activity of three phosphatases and intensity of P-translation,and larger amount of P-solubilizing bacteria.The P adsorption capacity of high-yielding field was higher than that of the middle-and low-yielding field,but there was no significant difference between them in P fixation ability,so the desorption of P in high-yielding field was easier.
【Fund】: 国家农业科技成果转化资金项目(2007GB2C600173)
【CateGory Index】: S158
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