Regulation of the C:N Ratio Improves the N-Fixing Bacteria Activity, Root Growth, and Nodule Formation of Peanut
文献类型： 外文期刊
作者： Liang, Haiyan 1 ; Yang, Liyu 1 ; Wu, Qi 1 ; Meng, Cuiping 1 ; Zhang, Jiancheng 1 ; Shen, Pu 1 ;
作者机构： 1.Shandong Acad Agr Sci, Shandong Peanut Res Inst, Key Lab Peanut Biol Genet & Breeding, Minist Agri & Rural Affairs, 126 Wannianquan Rd, Qingdao 266100, Peoples R China
2.Qingdao Univ Sci & Technol, Shandong Univ Clean Chem Proc, Coll Chem Engn, Key Lab, Qingdao 266042, Shandong, Peoples R China
关键词： Glucose addition; Plant growth; Root morphology; Microbial richness and diversity
期刊名称：JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION （ 影响因子：3.9； 五年影响因子：3.9 ）
ISSN： 0718-9508
年卷期： 2023 年
页码：
收录情况： SCI
摘要： This study is to investigate the effect of different C:N ratios on the soil-microorganism-plant system in peanut (Arachis hypogaea L.). A pot experiment was conducted to determine how different ratios of exogenous carbon (glucose) to nitrogen (urea) (C:N0 with 0.9 g N/pot, C:N5 with 0.9 g N/pot, 11.25 g glucose/pot, C:N15 with 0.9 g N/pot, 33.75 g glucose/pot, C:N25 with 0.9 g N/pot, 56.25 g glucose/pot) could influence peanut growth and soil microbial communities. Results showed that averaged plant height, lateral branch length, plant biomass, and the chlorophyll content (SPAD) were respectively significantly increased by 26.02%, 32.38%, 21.74%, and 7.07%, compared with C:N0 treatment. C addition treatments significantly improved total root length, total surface area, and total root volume. The & delta;C-13 values in whole plants and roots increased with the increasing of C:N ratio, while the & delta;N-15 values firstly increased and then decreased, in comparison with C:N0 treatment. The C addition had a significant influence on soil bacterial diversity in the peanut root zone. In comparison with the C:N0, the abundance-based ACE and Chao index all obviously increased. Pearson correlation showed that nodule numbers, root surface area correlated positively with Rhodocyclales, Zoogloeaceae, and Myxococcales, Anaeromyxobacteraceae, respectively. Moreover, different C:N ratios changed the soil bacterial community. The bacterial communities in the C addition treatments had higher species richness than those in the no C addition treatments. The results indicate that C addition ameliorates soil nutrient conditions and provides the benefits to soil bacterial communities and root and plant growth.
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