Effects of long-term no-tillage and maize straw mulching on gross nitrogen transformations in Mollisols of Northeast China

Geoderma, Journal Year: 2022, Volume and Issue: 428, P. 116194 - 116194

Published: Oct. 22, 2022

Conservation tillage practices are widely proposed as an effective management approach to guarantee soil productivity and sustainability by manipulating nutrient status, especially nitrogen (N) cycling. However, little is known about the interactive response of individual gross N transformation processes their regulation availability in soil. Therefore, a 15N tracing study was carried out investigate effect 12 years no-tillage with different amounts maize straw mulching on rates Mollisols Northeast China. Four treatments were arranged, including conventional ridge (RT) 0 % (NT0), 33 (NT33, 2500 kg ha−1 y-1) 100 (NT100, 7500 harvested mulching. The results explicitly indicated that field intensively controlled dynamic between inorganic organic forms thus manipulated retention supply pool. Specifically, relative tillage, reduced rate mineralization (MNorg, from 2.47 1.56 mg kg−1 d−1) but increased NH4+-N immobilization (INH4, 3.47 4.83 due disturbances. Increased residue input no-till systems stimulated both MNorg INH4, denoting improved available enhanced conservation systems. In addition, synchronically adsorption/fixation (ANH4, 2.38 4.11 subsequent release (RNH4ads, 1.80 3.64 processes, such accelerated abiotic turnover could react buffer for NH4+-N. Moreover, considerably autotrophic nitrification (from 6.39 3.70 while simultaneously promoted dissimilatory NO3−-N reduction (DNRA, 0.35 0.85 d−1), improving capacity reducing loss risk. Taken together, considering internal components, cycling gained conservational cultivation enhancing N.

Language: Английский

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The effect of thinning intensity on the soil carbon pool mediated by soil microbial communities and necromass carbon in coastal zone protected forests

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 881, P. 163492 - 163492

Published: April 14, 2023

Language: Английский

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Effect of no-till followed by crop diversification on the soil microbiome in a boreal short cereal rotation

Biology and Fertility of Soils, Journal Year: 2024, Volume and Issue: 60(3), P. 357 - 374

Published: Feb. 6, 2024

Abstract Diversification of agricultural practices, including changes in crop rotation, intercropping or cover cropping, influence the soil microbiome. Here impact tillage and diversification on microbiome is reported, being one few boreal studies. The field experiment consisted four treatments with replications all having a short cereal rotation practice namely an oat ( Avena sativa ) – spring barley Hordeum vulgare wheat Triticum aestivum for past 10 years until 2018. During that period two were conventionally tilled moldboard ploughing whereas other no-tillage treatments. From growing season 2018 fall 2020 main was barley. first conventional treatment diversified English ryegrass Lolium perenne as undersown next three seasons. continued only. second had winter rapeseed 2019. Bulk soils sampled May before then October 2018, 2019, 2020. results showed clear effect beta-diversity increase fungal richness. Barley monoculture interrupted resulted minor change bacterial community composition. Other alpha diversity measures did not react to nor gene copy abundances involved N cycle. In conclusion profound hindering diversification.

Language: Английский

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Bacterial necromass determines the response of mineral-associated organic matter to elevated CO2

Biology and Fertility of Soils, Journal Year: 2024, Volume and Issue: 60(3), P. 327 - 340

Published: March 2, 2024

Language: Английский

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Long-term cultivation reduces soil carbon storage by altering microbial network complexity and metabolism activity in macroaggregates

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 930, P. 172788 - 172788

Published: April 25, 2024

Language: Английский

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