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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

文献类型： 外文期刊

作者： Shen Pu 1 ; He Xin-hua 1 ; Xu Ming-gang 1 ; Zhang Hui-min 1 ; Peng Chang 3 ; Gao Hong-jun 3 ; Liu Hua 4 ; Xu Yong-mei 4 ; Qi 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Minist Agr, Key Lab Crop Nutr & Fertilizat, Beijing 100081, Peoples R China

2.Univ Western Australia, Sch Plant Biol, Crawley, WA 6009, Australia

3.Jilin Acad Agr Sci, Inst Agr Resources & Environm, Changchun 130001, Peoples R China

4.Xinjiang Acad Agr Sci, Inst Soil & Fertilizer, Urumqi 830091, Peoples R China

5.Guizhou Inst Soil & Fertilizer, Guiyang 550006, Peoples R China

6.Guizhou Inst Soil & Fert

关键词： long-term fertilization;phosphorus availability;black soil;grey desert soil

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）

ISSN： 2095-3119

年卷期： 2014 年 13 卷 3 期

页码：

收录情况： SCI

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 (r(2)=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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