INFLUENCES OF THE 28-YEAR APPLICATION OF FERTILIZER AND MANURE ON SOIL ORGANIC CARBON FRACTIONS IN A MAIZE-WHEAT ROTATION FIELD IN SOUTHERN CHINA
文献类型： 外文期刊
第一作者： Zhang, L. M.
作者： Zhang, L. M.;Zhang, L. M.;Lou, Y. L.;Xu, M. G.;Wang, X. L.
作者机构：
关键词： different carbon fraction; long-term fertilization; physicochemical fractionation; climate change; southern China
期刊名称：APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH （ 影响因子：0.816； 五年影响因子：0.896 ）
ISSN： 1589-1623
年卷期： 2022 年 20 卷 1 期
页码：
收录情况： SCI
摘要： Soil organic carbon (SOC) is an important indicator of soil quality and crop production. In order to optimize management practices and balance agronomic and environmental interests, we conducted physicochemical fractionation to determine the effect of different fertilization treatments on a maize-wheat field in southern China. The fertilization treatments include unfertilized control (CK), nitrogen fertilizer alone (N), balanced fertilizer (NPK) and application of fertilizer plus manure (NPKM). SOC in CK was 6.5 g kg(-1) lower than that in the NPKM treatment and 1.4 g kg(-1) higher than that in the N treatment. The proportions of C fractions to SOC in unprotected pool, physically protected pool and stably protected pool (chemically protected pool plus biochemically protected pool) were 22.2 similar to 43.9%, 4.8 similar to 6.9%, and 49.4 similar to 71.6%, respectively. Soil organic carbon was mainly contained in the unprotected C pool. In addition, the biochemically protected C showed changing saturation levels in different fertilization treatments. Therefore, the application of fertilizer plus manure might be the best option in order to improve soil TOC and C fractions in the maize-wheat cropping system.
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