Responses of soil nutrients and microbial activities to additions of maize straw biochar and chemical fertilization in a calcareous soil
文献类型： 外文期刊
作者：
Song, Dali
1
;
Tang, Jiwei
1
;
Xi, Xiangyin
2
;
Zhang, Shuiqing
3
;
Liang, Guoqing
1
;
Zhou, Wei
1
;
Wang, Xiubin
1
;
作者机构： 1.Chinese Acad Agr Sci, Inst Agr Resource & Reg Planning, Key Lab Plant Nutr & Nutrient Cycling, Minist Agr, Beijing 100081, Peoples R China
2.Southwest Univ, Chongqing 400715, Peoples R China
3.Henan Acad Agr Sci, Inst Plant Nutrient & Environm Resources, Zhengzhou 450002, Henan, Peoples R China
关键词： Maize straw biochar; Chemical fertilizer; Soil nutrients; Enzyme activity; Microbial community composition
期刊名称：EUROPEAN JOURNAL OF SOIL BIOLOGY （ 影响因子：2.846； 五年影响因子：3.618 ）
ISSN： 1164-5563
年卷期： 2018 年 84 卷
页码：
收录情况： SCI
摘要： Biochar addition to soil has been proposed as a strategy to enhance soil quality and crop productivity. However, little is known about responses of soil nutrients and microbial activities to additions of chemical fertilizer and biochar with different pyrolysis temperatures. To investigate the effects of control (CK), chemical fertilizer (NPK), and NPK with maize straw biochar (MC) produced at 300, 450, and 600 degrees C (NPK + MC300, NPK + MC450, and NPK + MC600) on crop yield, soil nutrients, soil enzyme activities, and microbial attributes in a calcareous soil, we conducted a pot experiment. The results showed that the NPK + MC450 treatment obtained the highest wheat yield and N, P, and K uptakes. The NPK + MC300 and NPK + MC450 treatments decreased significantly the soil available K content and increased the C/N ratio, contents of soil organic carbon (SOC) and available P compared to the NPK + MC600 treatment. The NPK + MC450 treatment promoted the increases in soil C- and N-cycling enzyme activities. The total N content, soil MBC and MBN were the main driving factors affecting soil enzyme activities. All the NPK plus MC soils significantly reduced the relative abundance of soil fungi and enhanced soil nutrient contents (excluding soil inorganic nitrogen) and total phospholipid fatty acid concentrations. A redundancy analysis revealed that the changes in soil microbial community depended mainly on the contents of MBC, MBN and available K as well as the C/N ratio. This study provides clear evidence that the co-application of NPK fertilizers and MC produced at 450 degrees C was more efficient for improving soil quality and potential crop productivity.
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