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| Soil Organic Carbon Accumulation Increases Percentage of Soil Olsen-P to Total P at Two 15-Year Mono-Cropping Systems in Northern China |
| SHEN Pu, HE Xin-hua, XU Ming-gang, ZHANG Hui-min, PENG Chang, GAO Hong-jun, LIU |
1、Key Laboratory of Crop Nutrition and Fertilization, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China
2、School of Plant Biology, University of Western Australia, Crawley, WA 6009, Australia
3、Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Sciences, Changchun 130001, P.R.China
4、Institute of Soil and Fertilizer, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, P.R.China
5、Guizhou Institue of Soil and Fertilizer, Guiyang 550006, P.R.China |
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摘要 Soil organic carbon (SOC) and soil Olsen-P are key soil fertility indexes but information on their relationships is limited particularly under long-term fertilization. We investigated the relationships between SOC and the percentage of soil Olsen-P to total P (PSOPTP) under six different 15-yr (1990-2004) long-term fertilizations at two cropping systems in northern China. These fertilization treatments were (1) unfertilized control (control); (2) chemical nitrogen (N); (3) N plus chemical P (NP); (4) NP plus chemical potassium (NPK); (5) NPK plus animal manure (NPKM) and (6) high NPKM (hNPKM). Compared with their initial values in 1989 at both sites, during the 11th to 15th fertilization years annual mean SOC contents were significantly increased by 39.4-47.0% and 58.9-93.9% at Gongzhuling, Jilin Province, and Urumqi, Xinjiang, China, under the two NPKM fertilizations, respectively, while no significant changes under the no-P or chemical P fertilization. During the 11th to 15th fertilization years, annual mean PSOPTP was respectively increased by 2.6-4.2 and 5.8-14.1 times over the initial values under the two chemical P fertilizations and the two NPKM fertilizations, but was unchanged in their initial levels under the two no-P fertilizations at both sites. Over the 15-yr long-term fertilization SOC significantly positively correlated with PSOPTP (r2=0.55-0.79, P<0.01). We concluded that the combination of chemical P plus manure is an effective way to promote SOC accumulation and the percentage of soil Olsen-P to total P at the two mono-cropping system sites in northern China.
Abstract Soil organic carbon (SOC) and soil Olsen-P are key soil fertility indexes but information on their relationships is limited particularly under long-term fertilization. We investigated the relationships between SOC and the percentage of soil Olsen-P to total P (PSOPTP) under six different 15-yr (1990-2004) long-term fertilizations at two cropping systems in northern China. These fertilization treatments were (1) unfertilized control (control); (2) chemical nitrogen (N); (3) N plus chemical P (NP); (4) NP plus chemical potassium (NPK); (5) NPK plus animal manure (NPKM) and (6) high NPKM (hNPKM). Compared with their initial values in 1989 at both sites, during the 11th to 15th fertilization years annual mean SOC contents were significantly increased by 39.4-47.0% and 58.9-93.9% at Gongzhuling, Jilin Province, and Urumqi, Xinjiang, China, under the two NPKM fertilizations, respectively, while no significant changes under the no-P or chemical P fertilization. During the 11th to 15th fertilization years, annual mean PSOPTP was respectively increased by 2.6-4.2 and 5.8-14.1 times over the initial values under the two chemical P fertilizations and the two NPKM fertilizations, but was unchanged in their initial levels under the two no-P fertilizations at both sites. Over the 15-yr long-term fertilization SOC significantly positively correlated with PSOPTP (r2=0.55-0.79, P<0.01). We concluded that the combination of chemical P plus manure is an effective way to promote SOC accumulation and the percentage of soil Olsen-P to total P at the two mono-cropping system sites in northern China.
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Received: 09 October 2013
Accepted:
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| Fund: Financial supports are from the National Basic Research Program of China (2011CB100501), the National Natural Science Foundation of China (41171239, 41371247) and the Project of Aid of Science and Technology in Xinjiang, China (201191140). Meanwhile, we thank all personnel for their valuable work associated with these two long-term experiments in Jilin and Xinjiang, China. |
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Corresponding Authors:
XU Ming-gang, Tel: +86-10-82105636, Fax: +86-10-82106225, E-mail: mgxu@caas.ac.cn
E-mail: mgxu@caas.ac.cn
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| About author: XU Ming-gang, Tel: +86-10-82105636, Fax: +86-10-82106225, E-mail: mgxu@caas.ac.cn |
Cite this article:
SHEN Pu, HE Xin-hua, XU Ming-gang, ZHANG Hui-min, PENG Chang, GAO Hong-jun, LIU .
2014.
Soil Organic Carbon Accumulation Increases Percentage of Soil Olsen-P to Total P at Two 15-Year Mono-Cropping Systems in Northern China. Journal of Integrative Agriculture, 13(3): 597-603.
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