Changes in Phosphorus Fractions, pH, and phosphatase Activity in rhizosphere of Two Rice Genotypes

LI Yong-Fu; LUO An-Cheng; WEI Xing-Hua; YAO Xu-Guo

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Changes in Phosphorus Fractions, pH, and phosphatase Activity in rhizosphere of Two Rice Genotypes

机译：两种水稻基因型根际的磷组分，pH和磷酸酶活性的变化

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A rhizobox experiment with two phosphorus (P) treatments, zero-P (0 mg P kg-1) and plus-P (100 mg P kg-1) as Ca(H2PO4)2·H2O, was conducted to study the chemical and biochemical properties in the rhizosphere of two rice genotypes (cv. Zhongbu 51 and Pembe) different in P uptake ability and their relationship with the depletion of soil P fractions. Plant P uptake, pH, phosphatase activity, and soil P fractions in the rhizcephere were measured. Both total dry weight and total P uptake of Pembe were significantly (P < 0.05) higher than those of Zhongbu 51 in the zero-P and plns-P treatments. Significant depletions of resin-Pi, NaHCO3-Pi, NaHCO3-Po, and NaOH-Pi, where Pi stands for inorganic P and Po for organic P, were observed in the rhizosphere of both Zhongbu 51 and Pembe under both P treatments. Pembe showed a greater ability than Zhongbu 51 in depleting resin-Pi, NaHCO2-Pi, NaHCO3-Po, NaOH-Pi, and NaOH-Po in the rhizosphere. HCl-Pi and residual-P were not depleted in the rhizosphere of both genotypes, regardless of P treatments despite significant acidification in the rhizosphere of Pembe under zero-P treatment. Higher acid phosphatase (AcPME) activity and alkaline phosphatase (A1PME) activity were observed in the rhizosphere of both Zhongbu 51 and Pembe compared to the corresponding controls without plant. AcPME activity was negatively (P < 0.01) correlated to NaHCO3-Po concentration in the rhizosphere of both Zhongbu 51 and Pembe, suggesting that AcPME was associated with the mineralization of soil organic P.

机译：进行了以两种磷（P）处理为Ca（H2PO4）2·H2O的零磷（0 mg P kg-1）和正磷（100 mg P kg-1）进行的根瘤菌试验，以研究化学和两种水稻基因型（中部51号和彭贝）的根际生物化学特性对磷的吸收能力不同，并且与土壤磷组分的耗竭有关。测量了根茎中植物对磷的吸收，pH，磷酸酶活性和土壤中的磷含量。在零磷和plns-P处理中，Pembe的总干重和P吸收均显着高于中部51。在两种补磷处理下，在中部51和彭贝的根际中都观察到树脂-Pi，NaHCO3-Pi，NaHCO3-Po和NaOH-Pi的大量消耗，其中Pi代表无机P，Po代表有机P。与根部51相比，Pembe在根际中消耗树脂Pi，NaHCO2-Pi，NaHCO3-Po，NaOH-Pi和NaOH-Po的能力更高。不论P处理如何，尽管在零磷处理下Pembe的根际中发生了明显的酸化，但两种基因型的根际中的HCl-Pi和残留P均未耗尽。与没有植物的对照相比，在中部51和彭贝的根际中观察到较高的酸性磷酸酶（AcPME）活性和碱性磷酸酶（A1PME）活性。中部51和彭贝的根际AcPME活性与NaHCO3-Po浓度呈负相关（P <0.01），表明AcPME与土壤有机磷的矿化有关。

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《土壤圈（英文版）》 |2008年第6期|785-794|共10页
作者
LI Yong-Fu; LUO An-Cheng; WEI Xing-Hua; YAO Xu-Guo;
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作者单位

College of Environmental and Resource Science, Zhejiang University, Hangzhou 310029,China;

School of Environmental Science and Technology, Zhejiang Forestry University, Lin'an 311300,China;

College of Environmental and Resource Science, Zhejiang University, Hangzhou 310029,China;

State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006,China;

College of Environmental and Resource Science, Zhejiang University, Hangzhou 310029,China;

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
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Changes in Phosphorus Fractions, pH, and phosphatase Activity in rhizosphere of Two Rice Genotypes

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