Response of soil biological properties and bacterial diversity to different levels of nitrogen application in sugarcane fields

AbstractTo select an eco-friendly nitrogen (N) application level for sugarcane production, soil fertility and soil bacterial diversity under different nitrogen application levels were analyzed. Four levels of urea applications were high Nitrogen (H, 964 kg ha−1), medium Nitrogen (M, 482 kg ha−1), low Nitrogen (L, 96 kg ha−1) and no Nitrogen (CK, 0 kg ha−1) treatments, respectively. The results showed that the soil microbial biomass carbon and phosphorus were altered significantly by CK and L treatments. Moreover, the indexes of soil bacterial richness and diversity in the sugarcane field could be significantly improved by L. At the genus level, SC-I-84, Mycobacterium, Micropepsaceae, Saccharimonadales, Subgroup_2 and Acetobacteraceae were the unique dominant bacteria in the soil with the H treatment. JG30-KF-CM45 and Jatrophihabitans were the unique dominant genera in the M treatment. Subgroup_6, HSB_OF53-F07, Streptomyces, 67–14, SBR1031 and KD4-96 were the unique dominant genera in the L treatment. In contrast, FCPS473, Actinospica, 1921–2, Sinomonas, and Ktedonobacteraceae were the unique dominant genera in the CK treatment. The findings suggest that soil fertility all could be changed by different N application levels, but the most increasing integral effect only could be found in L. Moreover, even though soil bacterial richness could be significantly promoted by the M and H treatments, but soil bacterial diversity could not be significantly improved. On the contrary, soil bacterial diversity and richness all could be improved by L treatment. In addition, higher abundance of unique soil dominant bacteria could be only found in L treatment which compared to the CK, M and H treatments. These findings suggest that the rate of 96 kg ha−1 N application is ecofriendly for sugarcane production in Guangxi.

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Comparison of Soil Biological Properties and Bacterial Diversity in Sugarcane, Soybean, Mung Bean and Peanut Intercropping Systems

Journal of Agricultural Science ◽

10.5539/jas.v13n8p54 ◽

2021 ◽

Vol 13 (8) ◽

pp. 54

Author(s):

Shangdong Yang ◽

Jian Xiao ◽

Ziyue Huang ◽

Renliu Qin ◽

Weizhong He ◽

...

Keyword(s):

Bacterial Diversity ◽

Mung Bean ◽

Microbial Biomass Carbon ◽

Biological Properties ◽

Soil Bacterial Diversity ◽

Nitrogen And Phosphorus ◽

Bacterial Assemblage ◽

Dominant Soil ◽

Soil Bacterial ◽

Dominant Bacteria

Sugarcane intercropping with soybean [Glycine max (Linn.) Merr.], mung bean [Vigna radiata (Linn.) Wilczek] and peanut (Arachis hypogaea Linn.) as well as a sugarcane monoculture were conducted to study the impacts of intercropping on soil biological characteristics and bacterial diversity. The results showed that soil cultivable microorganisms, the activities of soil enzymes and microbial biomass carbon, nitrogen, and phosphorus were all significantly improved by intercropping with soybean and mung bean. Additionally, soil bacterial diversity and richness in sugarcane fields were also significantly enhanced by intercropping with soybean and mung bean. In addition, soil bacterial community structures in sugarcane fields can be altered by intercropping with different legumes. Proteobacteria, a high-nutrient-tolerant bacterial assemblage, became the dominant bacteria in the sugarcane-soybean and sugarcane-mung bean intercropped soils. Twenty four, 28, 26 and 27 dominant soil bacterial genera were found after the sugarcane-soybean, sugarcane-mung bean, sugarcane-peanut and sugarcane monoculture treatments, respectively. Sugarcane-mung bean intercropping being the most promising system for regaining and improving soil fertility and soil heath and facilitate agriculture intensification of sugarcane.

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Comparison of soil biological properties and soil bacterial diversity in sugarcane, soybean, mung bean and peanut intercropping systems

10.21203/rs.3.rs-308313/v1 ◽

2021 ◽

Author(s):

Shangdong Yang ◽

Jian Xiao ◽

Ziyue Huang ◽

Renliu Qin ◽

Weizhong He ◽

...

Keyword(s):

Microbial Biomass ◽

Bacterial Diversity ◽

Mung Bean ◽

High Throughput Sequencing ◽

Microbial Biomass Carbon ◽

Agricultural Science ◽

Biological Traits ◽

Soil Bacterial Diversity ◽

Nitrogen And Phosphorus ◽

Soil Bacterial

Abstract Aims Sugarcane intercropping with soybean (Glycine max (Linn.) Merr.), mung bean (Vignaradiata (Linn.) Wilczek) and peanut (Arachishypogaea Linn.) as well as a sugarcane monoculture were conducted to study the impacts of intercropping on soil biological characteristics and bacterial diversity. Methods The soil samples were collected from twelve random sites and mixed well at the experimental farm of the Guangxi South Sub-tropical Agricultural Science Research Institute, Longzhou, China. Traditional analysis methods and modern high-throughput sequencing technology was used to compare and analyze the soil enzyme activity, microbial biomass, soil cultivable microorganisms and other biological traits and bacterial diversity.Results The results showed that soil cultivable microorganisms, the activities of soil enzymes and microbial biomass carbon, nitrogen, and phosphorus were all significantly improved by intercropping with soybean and mung bean. Additionally, soil bacterial diversity and richness in sugarcane fields were also significantly enhanced by intercropping with soybean and mung bean. In addition, soil bacterial community structures in sugarcane fields can be altered by intercropping with different legumes. Proteobacteria, a high-nutrient-tolerant bacterial assemblage, became the dominant bacteria in the sugarcane-soybean and sugarcane-mung bean intercropped soils. Twenty four, 28, 26 and 27 dominant soil bacterial genera were found after the sugarcane-soybean, sugarcane-mung bean, sugarcane-peanut and sugarcane monoculture treatments, respectively.Conclusions Sugarcane-mung bean intercropping suggested to be the most promising system for regaining and improving soil fertility and soil heath and facilitate agriculture intensification of sugarcane.

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Soil Bacterial Community Responses to N Application and Warming in a Qinghai-Tibetan Plateau Alpine Steppe

Frontiers in Ecology and Evolution ◽

10.3389/fevo.2021.709518 ◽

2021 ◽

Vol 9 ◽

Author(s):

Zhiyuan Mu ◽

Shikui Dong ◽

Yaoming Li ◽

Shuai Li ◽

Hao Shen ◽

...

Keyword(s):

Tibetan Plateau ◽

Bacterial Community ◽

Bacterial Communities ◽

Nitrogen Application ◽

Soil Bacterial Diversity ◽

Short Term ◽

N Application ◽

Soil Bacterial Communities ◽

Alpine Steppe ◽

Soil Bacterial

Nitrogen deposition and climate warming can alter soil bacterial communities. However, the response of soil bacteria in an alpine steppe to these changes is largely unknown. In this study, a field experiment was performed on the northeastern Qinghai-Tibetan Plateau to determine the changes in soil bacterial communities of alpine steppes in response to nitrogen application and warming. The experiment consisted of four treatments, namely no-N application with no-warming (CK), N application (8 kg N ha−1 year−1) with no-warming (N), warming with no-N application (W), and N application (8 kg N ha−1 year−1) with warming (W&N). This study aimed to investigate (1) the changes in soil bacterial diversity and community structure under simulated nitrogen deposition and warming conditions, and (2) the key environmental factors responsible for these changes. Based on the results, soil bacterial diversity and community composition did not change significantly in the short term. Warming had a significant effect on overall bacterial composition, rare species composition, and individual bacterial taxa. Besides, the interaction between nitrogen application and warming had a significant effect on community β-diversity. Above-ground plant variables were highly correlated with bacterial community characteristics. Nitrogen application and warming did not significantly alter the distribution range of the bacterial community. Overall, this study suggests that soil bacterial communities can remain relatively stable at the level of simulated nitrogen application and warming and that short-term climatic changes may have no significant impacts on soil bacterial communities.

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