文献类型： 外文期刊

作者： Liang, Yao ¹ ; Al-Kaisi, Mahdi ² ; Yuan, Jingchao ¹ ; Liu, Jianzhao ¹ ; Zhang, Hongxi ¹ ; Wang, Lichun ¹ ; Cai, Honggu ¹ ;

作者机构： 1.Jilin Acad Agr Sci, Inst Agr Resource & Environm, Key Lab Plant Nutr & Agroenvironm Northeast Reg, Minist Agr, Changchun 130033, Peoples R China

2.Iowa State Univ, Dept Agron, Ames, IA 50011 USA

关键词： Straw; Biochar; Compost; Carbon sequestration; Soil aggregates; Labile organic carbon

期刊名称：AGRICULTURE ECOSYSTEMS & ENVIRONMENT （ 影响因子：4.241； 五年影响因子：4.825 ）

ISSN： 0167-8809

年卷期： 2021 年 314 卷

页码：

收录情况： SCI

摘要： Application of organic amendments, such as maize straw and its derived biochar and compost are considered as effective strategies for sustaining soil productivity. However, limited information available on the variation of soil carbon sequestration, soil quality and crop yield responses to these amendments, especially in the highly rich organic matter soils. The field experiment was conducted in a Mollisol since the fall of 2011 to evaluate the impact of chemical fertilizer plus maize residue driven materials amendments on continuous maize yield, soil carbon sequestration and soil quality parameters. The experiment consisted of five treatments: CK (no fertilizer), NPK (chemical fertilizer), NPK+ST (NPK plus maize straw), NPK+CP (NPK plus straw compost), and NPK+BR (NPK plus straw biochar). The organic materials were applied on an equal carbon input basis (3.2 Mg ha-1 per year). Soil samples were collected from 0 to 10 cm and 10?20 cm soil depths in 2017, and analyzed for contents of soil organic carbon (SOC), readily oxidizable organic carbon (ROC), dissolved organic carbon (DOC), microbial biomass carbon (MBC), nutrients and aggregates-size distribution. The NPK+BR and NPK+CP significantly increased SOC stock at the topsoil (0?20 cm) relative to CK and NPK treatments. The amount of soil carbon sequestration (relative to SOC baseline in 2011) associated with different treatments was as follow: NPK+BR (13.1 Mg ha-1) NPK+CP (5.60 Mg ha-1) > NPK+ST (2.90 Mg ha-1) > NPK (0.50 Mg ha-1) > CK (-1.90 Mg ha-1). However, the greatest concentrations of ROC, DOC and MBC at the topsoil were observed in NPK+CP treatment, with greater supply of available nutrients than other treatments. The NPK+BR reduced the fraction percentage of microaggregates significantly (<0.25 mm), and in greater mean weight diameter and geometrical mean diameter than NPK+ST and NPK+CP treatments. The NPK plus straw or compost increased grain yield during the first year of application significantly as compared to NPK treatment, but no apparent change in yield observed in the first 3 years under biochar treatment. There is no considerable difference was found over six-year average of grain yield between the three organic treatments. Our results suggest that over six years the maizederived organic materials use have led to significant improvement in soil quality and maize yield, where straw derived biochar was more effective for soil carbon sequestration in Mollisol of Northeast China.