Tillage and straw-returning practices effect on soil dissolved organic matter, aggregate fraction and bacteria community under rice-rice-rapeseed rotation system

Bu, Rongyan; Ren, Tao; Lei, Mingjue; Liu, Bo; Li, Xiaokun; Cong, Rihuan; Zhang, Yangyang; Lü, Jianwei

doi:10.1016/j.agee.2019.106681

Cited by 126 publications

(69 citation statements)

References 44 publications

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“…In this study, we found that the application of wheat straw on the soil surface could enhance the SOC, TN, pH and other properties, which might directly or indirectly increase soil microbial diversity and abundance. These positive effects of straw covering on the composition and diversity of soil microbial community are in line with previous studies (46,47). One possible reason is that the long-term application of straw could relieve soil acidification, which would directly influence the composition of soil bacterial/fungal community.…”

Section: Citrus Planting Reduces Soil Microbial Communitiessupporting

confidence: 90%

Impacts of Intensive Land use on Soil Biodiversity and Ecosystem Functions in Central China

Zeng¹,

Meitang²,

Delgado‐Baquerizo³

et al. 2020

Preprint

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Background: The impacts of the conversion of natural to agricultural ecosystem on soil biodiversity and ecosystem functions are still disputable. Here, we compared the soil biodiversity (bacteria and fungi) and ecosystem functions of citrus orchards in different stages of succession (5–30 years) with those in adjacent natural ecosystems. Different management strategies were also considered for one of this stage (15 years). Results: The results indicate that changes from natural vegetation land to citrus orchards would lead to reduced soil bacterial diversity, as well as significant declines in multiple ecosystem functions associated with C cycle after 30 years of citrus plantation. However, the functions associated with N and P cycle were enhanced by the plantation. Citrus plantation negatively affected the C cycle by reducing the soil microbial diversity. Reduction in soil bacterial biodiversity was indirectly driven by increased soil acidification resulting from citrus plantation, while wheat straw addition could alleviate the reduction (15-year stage). Compared with natural vegetation, citrus plantation also reduced the relative abundance of multiple phylotypes, including Alphaproteobacteria, Deltaproteobacteria, Subgroup_6, Subgroup_4, Anaerolineae and Bacteroidia. The ecological clusters of soil bacteria and fungi were significantly associated with multiple ecosystem functions, suggesting that citrus planting altered multiple ecosystem functions via ecological clusters. Conclusions: Taken together, our results indicate that soil biodiversity, soil functions and C:N:P coupling are sensitive to the conversion of natural vegetation land to agricultural land, and further suggest that proper management of soil acidification can address some negative impacts of land use conversion on soil biodiversity and functions.

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Section: Citrus Planting Reduces Soil Microbial Communitiessupporting

confidence: 90%

Impacts of Intensive Land use on Soil Biodiversity and Ecosystem Functions in Central China

Zeng¹,

Meitang²,

Delgado‐Baquerizo³

et al. 2020

Preprint

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“…Similar results were obtained by Afanador-Barajas et al 2020, who found a significant effect of agricultural management on soil properties and the content of soil microorganisms (bacteria and actinomycetes). The type of tillage influences the microbiological variables; conservation systems promote microbial populations (Bu et al, 2020;Kraut-Cohen et al, 2020;Li et al, 2020;Sun et al, 2020). Lower soil disturbance preserves microhabitats, creating a better environment for microbial growth (Zuber and Villamil, 2016;Li et al, 2018).…”

Section: Resultsmentioning

confidence: 99%

Time-course of soil microbial communities in different tillage and crop rotation systems

González-Figueroa

Covarrubias-Prieto

Aguirre-Mancilla

et al. 2020

Chil. j. agric. res.

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The soil microbial communities involved in the biogeochemical cycles of plant nutrients are negatively affected by unfavorable agricultural practices. In three tillage systems (traditional tillage, TT; traditional tillage with residue incorporation, TTI; and conservation tillage, CT) with three crop rotations (cereal-cereal, CC ; legume-cereal, L-C; and cereal-legume, C-L) at three soil depths (0-5, 5-15, and 15-30 cm), the effects on the populations of bacteria, actinomycetes, and fungi over a period of six crop cycles (3 yr) were evaluated. The tillage system, crop rotation, and depth affected the concentration of microbes in the soil. Under TT/C-C (regional control), they decreased by 7.5%; in contrast, under CT/L-C and TTI/L-C, they increased by 144% and 76%, respectively. Regardless of the tillage system, rotation with legumes, especially when the legume was cultivated in the spring-summer cycle (C-L), caused significant increases in microbial populations. At the end of 3 yr, under CT and TTI the populations of actinomycetes increased, while the fungal population remained stable and the bacterial populations fluctuated in the different crop cycles. In all treatments, the concentration of microorganisms decreased with soil depth. Local practices represent a risk to the diversity of soil microbiota, and it is imperative that farmers adopt conservation practices to achieve sustainability.

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“…One of the reasons for this trend is the maintenance of the total carbohydrates level in the soil due to plants root excretion and decomposition of plant residues by cellulosedestroying microorganisms [17]. Numerous studies have established that humic preparations can positively affect the soil microbiological activity, which means that they indirectly participate in the formation of an agronomically valuable structure [10,18,19]. In the presented graphs (Figures 4 and 5) there is a salient relationship between the distribution of some fractions and the total amount of carbohydrates according to Chaddock's scale (r = 0.532).…”

Section: Materials and Research Methodsmentioning

confidence: 99%

Influence of humic preparations on the content of carbohydrates in structural units and their water resistance

Lykhman¹,

Klimenko²,

Dubinina³

et al. 2020

E3S Web Conf.

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The effect of the combined use of humic preparations and pesticides in various dosages on the quantitative composition of carbohydrates in agronomically valuable soil aggregates was studied. Biologically active humic substances indirectly, through plants and microorganisms, intensify the release of sugars, which play an essential role in the initial stages of the soil aggregates formation. Pesticides have a depressing effect on the soil microflora development, which, in turn, is one of the factors of the agronomically valuable soil structure formation. The introduction of humic preparations reduces the toxic effect of pesticides and reduces seasonal deterioration in the structural state of the soil. It has been shown that the distribution of aggregates according to variants, both in the case of dry sieving and in the case of wet sieving, correlates with the dynamics of the carbohydrate content in soil particles. This tendency is especially perceptible in the variants where pesticides were introduced into the soil together with the humic preparation. The correlation between the distribution of soil aggregates and carbohydrates according to Chaddock’s scale is salient (r = 0.532). The introduction of humic preparations makes it possible to reduce the loss of the agronomically valuable structure even in aftereffect.

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Tillage and straw-returning practices effect on soil dissolved organic matter, aggregate fraction and bacteria community under rice-rice-rapeseed rotation system

Cited by 126 publications

References 44 publications

Impacts of Intensive Land use on Soil Biodiversity and Ecosystem Functions in Central China

Impacts of Intensive Land use on Soil Biodiversity and Ecosystem Functions in Central China

Time-course of soil microbial communities in different tillage and crop rotation systems

Influence of humic preparations on the content of carbohydrates in structural units and their water resistance

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