Effect of Land Use Conversion from Rice Paddies to Vegetable Fields on Soil Phosphorus Fractions

J. L. DARILEK; HUANG Biao; LI De-Cheng; WANG Zhi-Gang; ZHAO Yong-Cun; SUN Wei-Xia; SHI Xue-Zheng

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Effect of Land Use Conversion from Rice Paddies to Vegetable Fields on Soil Phosphorus Fractions

机译：稻田改种菜地对土壤磷组分的影响

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Excess phosphorus (P) from agricultural soils contributes to eutrophication in water bodies.Samples (n=60) were taken from sites where rice paddies have been converted to vegetable fields for 0, 20 years and analyzed for five inorganic P (Pi) fractions,three organic P(Po) fractions,and several soil parameters to investigate how land use conversion affects Pi and Po fractions in a peri-urban area of China with soils characteristic of many agricultural areas of Asia.Significant increases of 33,281,293,and 438 mg kg 1 were found for soluble and loosely bound Pi (SL-Pi),aluminum-bound Pi (Al-Pi),calcium-bound P i (Ca-Pi),and iron-bound Pi (Fe-Pi),respectively,after conversion from rice paddies to vegetable fields.Most of the increase in Pi was in the form of Fe-Pi,which increased from 8% of total P (TP) on paddy soil to 31% on the soil with > 20-year vegetable cultivation,followed by Al-Pi,which increased from 2% to 19% of TP.For Po fractions,there was no significant change in P concentrations.The conversion of land use from paddy fields to high intensity vegetable fields was causing significant changes in soil P fractions.Management practices were causing a buildup of soil P,primarily in the Fe-Pi fraction,followed by Ca-Pi and Al-Pi fractions.If current trends continue,a 30%-70% increase in TP could be expected in the next 20 years.Farmers in the area should reduce P application and use to maximize P uptake.

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《土壤圈（英文版）》 |2010年第2期|137-145|共9页
作者
J. L. DARILEK; HUANG Biao; LI De-Cheng; WANG Zhi-Gang; ZHAO Yong-Cun; SUN Wei-Xia; SHI Xue-Zheng;
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作者单位

Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

Graduate University of the Chinese Academy of Sciences, Beijing 100039 China;

Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

Graduate University of the Chinese Academy of Sciences, Beijing 100039 China;

Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 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);
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Effect of Land Use Conversion from Rice Paddies to Vegetable Fields on Soil Phosphorus Fractions

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