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Effects of Long-Term Fertilization on Soil Carbon and Nitrogen in Chinese Mollisols

文献类型： 外文期刊

作者： Jiao, Xiaoguang 1 ; Gao, Chongsheng 2 ; Sui, Yueyu 2 ; Lu, Guohong 3 ; Wei, Dan 4 ;

作者机构： 1.Heilongjiang Univ, Inst Agr Resource & Environm, Key Lab Agr Resources Utilizat & Environm Secur, Harbin 150080, Peoples R China

2.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Harbin 150081, Peoples R China

3.China Meteorol Adm, Inst Atmospher Environm, Shenyang 110016, Peoples R China

4.Heilongjiang Acad Agr Sci, Inst Soil Fertil & Environm Sources, Harbin 150086, Peoples R China

期刊名称：AGRONOMY JOURNAL （ 影响因子：2.24； 五年影响因子：2.829 ）

ISSN： 0002-1962

年卷期： 2014 年 106 卷 3 期

页码：

收录情况： SCI

摘要： Three field experiments were conducted to examine the influence of long-term (30-31 yr) effect of fertilizer applications on soil C and N in the mollisols of Northeast China. Each experiment represented a different latitude range: low latitude (LatL), middle latitude (LatM) and high latitude (LatH). Four types of fertilizer applications were considered: (i) CK: unfertilized (control); (ii) NPK: balanced application of inorganic fertilizer nitrogen, phosphorus, potassium; (iii) M: application of organic manure; and (iv) NPKM: fertilizer nitrogen, phosphorus, potassium, plus organic manure. Compared with CK treatments, applications of fertilizers increased soil organic carbon (SOC), total nitrogen (TN), available nitrogen (AN), microbial biomass carbon (Cmic) and microbial biomass nitrogen (Nmic). On average compared with CK treatments, SOC in the NPK, M, and NPKM treatments increased by 2.74, 22.00, and 27.81%, respectively. Thus, applications of organic manure combined with inorganic fertilizers showed greater effects on the topsoil C and N content than inorganic fertilizers. Under the same fertilizer treatments, SOC, TN, Nmic, and Cmic contents were the lowest at LatM site. Available N content decreased for a latitude sequence of LatH > LatM > LatL for CK, M, and NPKM treatments and LatM > LatH > LatL for the NPK treatments. These results indicate that the magnitude of soil C and N among the three sites was not related to the latitude of the experiments.

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