您好，欢迎访问吉林省农业科学院 机构知识库！
吉林省农业科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Effects of long-term cropping regimes on SOC stability, soil microbial community and enzyme activities in the Mollisol region of Northeast China

文献类型： 外文期刊

作者： Cui, Jiwen 1 ; Song, Dali 1 ; Dai, Xianglin 1 ; Xu, Xinpeng 1 ; He, Ping 1 ; Wang, Xiya 1 ; Liang, Guoqing 1 ; Zhou, Wei; 1 ;

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

2.Jilin Acad Agr Sci, Gongzhuling 130124, Peoples R China

关键词： Crop rotation; Microbial community; Enzyme activity; C-13 NMR; PLS-PM

期刊名称：APPLIED SOIL ECOLOGY （ 影响因子：4.046； 五年影响因子：4.884 ）

ISSN： 0929-1393

年卷期： 2021 年 164 卷

页码：

收录情况： SCI

摘要： Retaining carbon in cultivated soils is an important mechanism to mitigate climate change and to maintain the sustainability of agricultural ecosystems. Characterization of the soil microbial community was an early means to quantify the increase in soil organic carbon (SOC) content and stability under different cropping systems. However, the effects of different cropping systems on the soil microbial community and enzyme activity and the driving force for increasing the SOC content remain unclear, especially the differences between continuous maize (Zea mays L.) cropping and rotation systems containing legumes. We used a long-term field experiment (30 years) in the Mollisol region of Northeast China. The field experiment was undertaken in split-plot design comprised of four treatments: i) farmland fallow (FALL), ii) continuous soybean cropping (CSC), iii) maize-soybean rotation (MSR), iv) continuous maize cropping (CMC). Fluorometric assays and phospholipid fatty acid analysis (PLEA) were used to determine the biological characteristics of the soil. The SOC chemical composition was characterized using Cross Polarization/Magic Angle Spinning solid-state C-13-nuclear magnetic resonance (C-13 NMR) spectroscopy. Principal component analysis (PCA), redundancy analysis (RDA) and the partial least squares path model (PLS-PM) were used to explore the coupling mediation of these parameters further. Our results suggested that soil microbes in the four systems were not limited by C and N, but co-limited by P. But compared with the FALL system, the CMC system significantly alleviated the phosphorus limitation of the microorganisms. The CMC system also significantly increased soil nutrient content, especially SOC content (40.8%), available phosphorus (117%), available potassium (30.3%), NO3-center dot N (148%), and increased microbial community abundance and enzyme activities. Compared with the CMC system, the MSR system held relatively lower Gram-positive: Gramnegative ratio and higher fungi: bacteria ratio, which indicated that the soil microbial community structure is more conducive to improving the SOC stability. Meanwhile, more evidence supporting data that SOC stability was enhanced in MSR soils was provided by the C-13 NMR spectra and higher-quality indices (A / AO, AI, HI and LCI). Moreover, strong correlations and RDA analysis confirmed that SOC is the main factor affecting microbial communities and enzyme activities.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：吉林省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台