Effects of plastic and straw mulching on soil microbial P limitations in maize fields: Dependency on soil organic carbon demonstrated by ecoenzymatic stoichiometry

Ma, Zizong; Zhang, Xucheng; Zheng, Bangyu; Yue, Shanchao; Zhang, Xuechen; Zhai, Bingnian; Wang, Zhaohui; Zheng, Wei; Li, Ziyan; Zamanian, Kazem; Razavi, Bahar S.

doi:10.1016/j.geoderma.2021.114928

Cited by 57 publications

(22 citation statements)

References 51 publications

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“…Wang et al, 2012). Ground mulching, includes straw, film, and gravel mulching, is one of the important farming protection managements and can improve soil nutrient content and soil water use (Ma et al, 2021;Yin et al, 2018;Zheng et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Appropriate farmland conservation management not only improve crop yields, but also enhance soil quality conditions and soil fertility, which are important for sustainable development of agriculture (Hou et al., 2012; Sun et al., 2020; S. Wang et al., 2012). Ground mulching, includes straw, film, and gravel mulching, is one of the important farming protection managements and can improve soil nutrient content and soil water use (Ma et al., 2021; Yin et al., 2018; Zheng et al., 2019).…”

Section: Introductionmentioning

confidence: 99%

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Long‐term ground cover affects soil bacterial community and carbon metabolism in the Loess Plateau, China

Zhang

Wang

et al. 2022

Soil Science Soc of Amer J

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Farmland mulching can maintain soil nutrients, which plays a positive role in agricultural planting in the arid area. However, the composition of the soil microbial community and the C cycle involved is unclear under farmland mulching. Based on the Changwu Agro-Ecological Experiment Station, this study set up a long-term positioning experiment to explore the effect on soil bacterial community structure and C metabolism capacity. In this study, we include five treatments: control uncovered (CK), plastic film mulching (PF), high amount of straw mulching carried out in July, August, and September every year (St 90 ), low amount of straw mulch throughout the growth period (S 45 ), and high amount of straw cover throughout the growth period (S 90 ). We combined Illumina MiSeq sequencing and Biolog-ECO technology to analyze the functional characterization of soil bacterial community composition in terms of C source metabolism. The results indicated that the soil bacteria showed a high degree of epistatic clustering, and the operational taxonomic unit numbers of soil bacteria decrease as St 90 , S 45 , PF, CK, and S 90 . Redundancy analysis showed that soil available P, NH 4 + -N, soil moisture content were the main environmental factors affecting bacterial community composition. Proteobacteria, Acidobacteria, and Actinobacteria are the main dominant flora in this area. Soil bacterial C metabolism was highest under PF treatment. Structural equation modeling (SEM) shows that surface cover has direct and indirect effects on bacterial C metabolism capacity and diversity through soil physicochemical properties. Reasonable mulching methods have a positive effect on the sustainable development of agro-ecosystems in arid areas. Abbreviations: AP, available phosphorus; AWCD, average well color development; CK, control uncovered; MC, soil moisture content; MFC, soil maximum water holding capacity in the field; NH 4 + -N, soil ammonium nitrogen; NO 3 − -N, nitrate-nitrogen; OTU, operational taxonomic units; PF, plastic film mulch; RDA, redundancy analysis; S 45 , low amount of straw mulch throughout the growth period; S 90 , high amount of straw cover throughout the growth period; SEM, structural equation modeling; SOC, soil organic carbon; St 90 , high amount of straw mulching is carried out in July, August, and September; TC, total carbon; TN, total nitrogen; TP, total phosphorus.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Long‐term ground cover affects soil bacterial community and carbon metabolism in the Loess Plateau, China

Zhang

Wang

et al. 2022

Soil Science Soc of Amer J

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“…Cui et al (2018) illustrated that metabolic limitations in rhizosphere soils are observably altered by soil nutrient (mainly C, N, and P) stoichiometry and availability. Ma et al (2021) reported that topsoil microbial P limitations are driven by the decomposition of SOM via soil ecoenzymatic stoichiometry in rainfed agroecosystems. Soil extracellular enzymes decompose substrates with varying compositions and complexities, mainly including hydrolases and oxidases.…”

Section: Introductionmentioning

confidence: 99%

Microbial nutrient limitation in rhizosphere soils of different food crop families: Evidence from ecoenzymatic stoichiometry

Wang

Gong

et al. 2022

Land Degrad Dev

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Microbial metabolism directly participates in soil nutrient recycling and ecosystem stability. Although the rhizosphere soil is one of the most active habitats, information on how microorganisms acquire nutrients based on ecoenzymatic stoichiometry is lacking, especially for major food crops under field conditions. Thus, this study aimed to explore the soil nutrient properties and microbial biomass concentrations as well as extracellular enzymatic activities and focused on carbon (C), nitrogen (N), and phosphorus (P) cycling of different crop types, including potato (Solanaceae), maize (cereal), soybean (Leguminosae), and buckwheat (Polygonaceae) in the arid area of northern Shaanxi, China. Microorganisms in the rhizosphere soil of four crops were subjected to relative C and N limitation tests based on ecoenzymatic activities.Among the crops, potato and soybean exhibited the maximum limitations. Linear regression analysis of soil nutrients, microorganisms (stoichiometric homeostasis), and threshold elemental ratio synthetically supported microbial metabolic limitations. This finding coincided with the highest and lowest microbial carbon use efficiencies in soybean (0.58) and potato (0.51), illustrating the distinguishing physiological responses of microbes. Partial least squares path modeling further confirmed that the soil microbial nutrient limitations were significantly regulated by soil nutrient properties and extracellular enzyme activities. Taken together, soil microbial metabolism in agricultural ecosystems was co-limited by relative C and N regardless of the main food crop families in this region in China (northern Loess Plateau). These observations clarified the nutrient cycling driven by soil elemental stoichiometry at the rootsoil interface in arid and oligotrophic ecosystems.

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“…AP is a key enzyme associated with the hydrolyzation of organic P. This approach has been widely used because it is more effective than the traditional method. For example, analyzing the stoichiometry of extracellular enzymes has been used to determine C, N and P limitations in a karst region (Chen et al, 2019.;Li et al, 2019) and in agro-ecosystems in semiarid areas (Ma et al, 2021) in China. Microbial growth is strongly related to microbial metabolic characteristics, which is controlled by microbial resource status, so that adopting effective soil managements to relief microbial resource limitation and thus increase microbial growth is important.…”

Section: Introductionmentioning

confidence: 99%

Responses of Microbial Nutrient Acquisition to Depth of Tillage and Incorporation of Straw in a Chinese Mollisol

Zhang

Chen

Han

et al. 2021

Front. Environ. Sci.

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Tillage and straw incorporation are important agricultural practices that can break the plow layer and improve Mollisol fertility. The effect of these practices on the limitation of resources for soil microorganisms, however, is unclear. We established a field experiment in 2018 and collection of soil samples in 2020 to study the acquisition of resources by microbes in a Mollisol region in northeastern China. Four treatments were studied: conventional tillage (CT), straw incorporation with conventional tillage (SCT), subsoil tillage (ST) and straw incorporation with subsoil tillage (SST). The limitation of resources for soil microorganisms was assessed using models of extracellular enzymatic stoichiometry. The soil microbes were generally colimited by C and P but not N. The degree of limitation, however, varied among the treatments. SCT and SST alleviated microbial P limitation in the 0–15 and 15–35 cm layers, respectively, but ST did not significantly affect P limitation relative to CT. Interestingly, N-resource contents were strongly correlated with indicators of C and P limitation. A random forest analysis found that the contents of available N and total dissolved N were the most important factors for microbial C and P limitation, respectively. Straw incorporation alleviated microbial P limitation but did not eliminate P limitation and deep tillage aggravate microbial C limitation. We suggest that N fertilization may be reduced due to the N-rich characteristics of the Mollisols in northeastern China.

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Effects of plastic and straw mulching on soil microbial P limitations in maize fields: Dependency on soil organic carbon demonstrated by ecoenzymatic stoichiometry

Cited by 57 publications

References 51 publications

Long‐term ground cover affects soil bacterial community and carbon metabolism in the Loess Plateau, China

Long‐term ground cover affects soil bacterial community and carbon metabolism in the Loess Plateau, China

Microbial nutrient limitation in rhizosphere soils of different food crop families: Evidence from ecoenzymatic stoichiometry

Responses of Microbial Nutrient Acquisition to Depth of Tillage and Incorporation of Straw in a Chinese Mollisol

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