New agricultural practices in the Loess Plateau of China do not reduce colonisation by arbuscular mycorrhizal or root invading fungi and do not carry a yield penalty

Duan, Taizhong; Shen, Yuying; Facelli, Evelina; Smith, Sally E.; Zhang, Nan

doi:10.1007/s11104-009-0251-3

Cited by 25 publications

(15 citation statements)

References 28 publications

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“…In this site, tillage significantly affected corn root development by increasing its biomass, surface area, average diameter, volume, total length density and percentage of medium size, but decreased specific root length, percentage of fine roots and total AMF colonization (Sheng et al 2012), which was also reported in studies conducted elsewhere (Alguacil et al 2008;Duan et al 2010). The P fertilization increased total root length density, percentage of fine roots and AMF spore density while it reduced AMF hyphal density and phylotype richness (Sheng et al 2012(Sheng et al , 2013; an effect aggravated by tillage.…”

Section: Soil Microbiologysupporting

confidence: 79%

Long-term tillage and synthetic fertilization affect soil functioning and crop yields in a corn–soybean rotation in eastern Canada

et al. 2014

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Ziadi, N., Angers, D. A., Gagnon, B., Lalande, R., Morel, C., Rochette, P. and Chantigny, M. H. 2014. Long-term tillage and synthetic fertilization affect soil functioning and crop yields in a corn–soybean rotation in eastern Canada. Can. J. Soil Sci. 94: 365–376. Adoption of conservation practices can induce beneficial changes to soil properties and related crop yields in which magnitude varies according to soil and climatic conditions but usually increases with time. A long-term field experiment was initiated in 1992 at L'Acadie in southern Quebec on a clay loam soil to evaluate the effect of tillage [mouldboard plow (MP) vs. conservation (CT)], synthetic N fertilization (0, 80, and 160 kg N ha−1) and synthetic P fertilization (0, 17.5, and 35 kg P ha−1) on soil functioning and grain yields of a corn–soybean rotation. Soil tillage was performed every year while synthetic fertilizers were applied only to the corn. Results obtained 12 to 20 yr after initiation of the study indicated that CT enhanced organic C accumulation, NO3-N, P and K availability, microbial biomass and activity, and microbial community structure in the upper soil layer, likely due to leaving crop residues at the soil surface. The MP practice resulted in greater organic C content deeper, near the bottom of the plow layer, which promoted soil microbial activity at that depth. However, soil N2O emissions were not affected by tillage. The N and P fertilization increased the availability of these nutrients, but had no significant effect on the soil microbial biomass, activity, and structure. Linear relationships were established between soil available P and cumulative P budgets obtained under MP or 0 kg P ha−1 under CT. Crop yields varied by year in this study but on average, MP yielded 10% more corn and 13% more soybeans than CT. Corn yield increased linearly with added synthetic N each year, whereas soybean yield was little affected by residual N, and both crops did not respond to fertilizer P. Response to N fertilization did not differ due to tillage or P. Despite higher costs associated with plowing, the profitability of MP was greater than CT on this clay loam soil due to greater yields. Specialized management practices (e.g., delayed planting, better herbicide selection, fall cover crop, in-row tillage) might help to improve CT performance on these cool, humid fine-textured soils.

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Section: Soil Microbiologysupporting

confidence: 79%

Long-term tillage and synthetic fertilization affect soil functioning and crop yields in a corn–soybean rotation in eastern Canada

et al. 2014

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“…After ten years of conversation tillage practices in a crop rotation system, soil physical and chemical properties were improved, leading to no yields penalty and greater water use efficiency (WUE) in this rotation system (Duan et al, 2010). Soil properties which showed improvement included soil organic matter (SOM), total nitrogen (TN), phosphorus (P) content, bulk density, porosity, and soil aggregate size (data not shown), consistent with prior investigations of conservation tillage effects (Peixoto et al, 2006;Thomas et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

Comparison of soil microbial community catabolic diversity between rhizosphere and bulk soil induced by tillage or residue retention

Yang¹,

Wang²,

Shen

2013

J. Soil Sci. Plant Nutr.

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The effects of long term no-till and crop residue on soil microbial community catabolic function and relevant carbon cycle in the rhizosphere and bulk soils were assessed in the 10 th year of a maize-winter wheat-soybean crop rotation. Conventional and zero tillage were coupled with residue removal and residue retention in a factorial design. Soil microbial community catabolic diversity was determined using Biolog-Eco plate. Average well colour development value (AWCD) of the microbial community in the rhizosphere soil was significantly higher than that in the bulk soil. Soil organic carbon (SOC) and microbial biomass carbon (MB-C) content of rhizosphere soil under both zero tillage and residue removal treatments were significantly higher than those in the bulk soil. Microbes in bulk soil presented a preferential utilization of diverse carbon sources when crop residue was retained. Zero tillage significantly increased the utilization of most carbon sources of microbial in the rhizosphere compared to conventional tillage. Principal component analysis (PCA) of the distribution of carbon substrate utilization for all treatments suggests that the microbial community catabolic diversity is different between the tillage management treatments and between soil sampling positions. Effects of zero tillage and crop residue retention were different with respect to the microbial catabolic diversity in the rhizosphere and the bulk soil.

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“…But inconsistent results from field studies included in that analysis and many more recent ones (e.g. Gavito & Miller 1998;Duan et al 2010;White & Weil 2010;Higo et al 2014) point to a need to assess how the wide variety of conditions [e.g. soil type, crop species, soil phosphorus (P) status] across these studies influence AM responses.…”

Section: Introductionmentioning

confidence: 99%

Ecological intensification and arbuscular mycorrhizas: a meta‐analysis of tillage and cover crop effects

Bowles

Jackson

Loeher

et al. 2016

Journal of Applied Ecology

196

102

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1. Reliance on ecosystem services instead of synthetic, non-renewable inputs is increasingly seen as key to achieving food security in an environmentally sustainable way. This process, known as ecological intensification, will depend in large part on enhancing below-ground biological interactions that facilitate resource use efficiency. Arbuscular mycorrhizas (AM), associations formed between the roots of most terrestrial plant species and a specialized group of soil fungi, provide valuable ecosystem services, but the full magnitude of these services may not be fully realized under conventional intensively managed annual agricultural systems. 2. Here, we use meta-analysis to assess how reducing soil disturbance and periods without roots in agricultural systems affect the formation of AM and the diversity and community composition of arbuscular mycorrhizal fungi (AMF). We compiled data from 54 field studies across five continents that measured effects of tillage and/or cover cropping on AMF colonization and/or communities and assessed effects of management and environmental factors on these responses. 3. Less intensive tillage and winter cover cropping similarly increased AMF colonization of summer annual cash crop roots by $ 30%. The key variables influencing the change in AMF colonization were the type of cover crop or the type of alternative tillage, suggesting that farmers can optimize combinations of tillage and cover crops that most enhance AM formation, particularly with no-till systems and legume cover crops. 4. Richness of AMF taxa increased by 11% in low-intensity vs. conventional tillage regimes. Several studies showed changes in diversity and community composition of AMF with cover cropping, but these responses were not consistent. 5. Synthesis and applications. This meta-analysis indicates that less intensive tillage and cover cropping are both viable strategies for enhancing root colonization from indigenous arbuscular mycorrhizal fungi (AMF) across a wide range of soil types and cash crop species, and possibly also shifting AMF community structure, which could in turn increase biologically based resource use in agricultural systems.

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New agricultural practices in the Loess Plateau of China do not reduce colonisation by arbuscular mycorrhizal or root invading fungi and do not carry a yield penalty

Cited by 25 publications

References 28 publications

Long-term tillage and synthetic fertilization affect soil functioning and crop yields in a corn–soybean rotation in eastern Canada

Long-term tillage and synthetic fertilization affect soil functioning and crop yields in a corn–soybean rotation in eastern Canada

Comparison of soil microbial community catabolic diversity between rhizosphere and bulk soil induced by tillage or residue retention

Ecological intensification and arbuscular mycorrhizas: a meta‐analysis of tillage and cover crop effects

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