Improved straw management practices promote in situ straw decomposition and nutrient release, and increase crop production

Guan, Xiaokang; Li, Wei; Turner, Neil C.; Chen, Shou; Yang, Ming Da; Wang, Tong Chao

doi:10.1016/j.jclepro.2019.119514

Cited by 115 publications

(63 citation statements)

References 42 publications

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“…This increases the degree of cementation, making it difficult to decompose to release the nitrogen [46]. In this study, the release rate of N, P, and K was higher in the animal manure treatment than that without, which was consistent with the findings of Guan et al [10]. The reason for this observation might be because animal manure contained nutrients, providing more substrates for the growth of microorganisms, increasing the abundance of the microbial community, and further accelerating the process of straw decomposition and the release of nutrients.…”

Section: Discussionsupporting

confidence: 92%

“…A large number of studies have suggested measures to promote straw decomposition, mainly by focusing on different nitrogen application rates from the organic materials, different returning methods, and straw combined with an application of different fertilizers or decaying agents [9,10]. Zhao et al [11] found that the return of straw along with different fertilizers increased the straw decomposition rate, which was attributed to the greater biomass and diversity of fungi and bacteria.…”

Section: Introductionmentioning

confidence: 99%

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Decomposition Characteristics, Nutrient Release, and Structural Changes of Maize Straw in Dryland Farming under Combined Application of Animal Manure

Sun

et al. 2021

Sustainability

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Straw and animal manure are major organic waste materials from agricultural ecosystems. Different kinds of animal manure combined with straw (AM-S) may have varying effects on the decomposition, nutrient release, and structural changes of maize straw. Using the Humic Cambisols soil as the experimental area, the straw decomposition characteristics under the co-application of animal manure were studied following the nylon net bag landfill method. The experiment involved four treatments: maize straw only (S), maize straw plus ox manure (SO), maize straw plus chicken manure (SC), and maize straw plus pig manure (SP). The treatments with AM-S accelerated the decomposition of straw and increased the release rate of nutrients and organic components (cellulose, hemicellulose, and lignin). During the 240 days of the study, straw decomposition showed a trend of increasing rapidly in the first stages and then increasing slowly in the latter stages in all the treatments. At 240 d, the straw decomposition rates and carbon release rates of the AM-S treatments were 65.25–71.87% and 64.04–69.35%, respectively. At the end of the experiment, the order for the final release rates of nitrogen (N), phosphorus (P), and potassium (K) was K (93.25–96.56%) > P (42.25–55.08%) > N (40.01–52.23%). Moreover, scanning electron microscopy showed that SP treatment had the highest degree of structural changes of the maize straw compared with the other treatments. The purpose of this study was to screen the effective animal manure that can promote straw decomposition and provide a reference for the rational use of straw and animal manure management. In conclusion, the study suggested that the co-application of animal manure and straw should be adopted in agricultural systems, especially SP treatment, as it was more conducive to promoting the decomposition of maize straw and the release of nutrients.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Decomposition Characteristics, Nutrient Release, and Structural Changes of Maize Straw in Dryland Farming under Combined Application of Animal Manure

Sun

et al. 2021

Sustainability

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“…It is almost alarming that in an annual application of wheat straw (5 t DM ha −1 = 2140 kg C ha −1 ) C SOM also decreased (by 8%). It is obvious that straw is relatively quickly mineralized after its incorporation into the soil [ 24 , 25 , 26 , 27 ]. Due to this fact it is clear that cereal straw application itself cannot improve the soil organic matter content and quality.…”

Section: Discussionmentioning

confidence: 99%

Soil Organic Matter Degradation in Long-Term Maize Cultivation and Insufficient Organic Fertilization

Balík

Kulhánek

Černý

et al. 2020

Plants

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Soil organic matter carbon (CSOM) compounds degradation was observed in long-term field experiments with silage maize monoculture. Over a period of 26 years, the content of carbon in topsoil decreased by 22% in control unfertilized plots compared to 25% and 26% in treatments fertilized annually with mineral nitrogen. With annual wheat straw application (together with mineral N), the content of CSOM decreased by 8%. Contrary to that, the annual application of farmyard manure resulted in a CSOM increase of 16%. The ratio of carbon produced by maize related to total topsoil CSOM content ranged between 8.1–11.8%. In plots with mineral N fertilization, this ratio was always higher than in the unfertilized control plots. With the weaker soil extraction agent (CaCl2), the ratio of carbon produced by maize was determined to be 17.9–20.7%. With stronger extraction agent (pyrophosphate) it was only 10.2–14.6%. This shows that maize produced mostly unstable carbon compounds. Mineral N application resulted in stronger mineralization of original and stable organic matter compared to the unfertilized control. However, the increase of maize-produced carbon content in fertilized plots did not compensate for the decrease of “old” organic matter. As a result, a tendency to decrease total CSOM content in plots with mineral N applied was observed.

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“…Among environmental considerations for biomass harvest systems, one of the most important is the effect on soil quality parameters such as soil organic matter (SOM) and SOC, nutrient balances, soil pH, aggregate stability and water holding capacity (Chen et al., 2020; Guan et al., 2020; Kan et al., 2020; Li et al., 2019; Su et al., 2020; Susser et al., 2020).…”

Section: Crop Residue Management Effects On Soil Quality Parametersmentioning

confidence: 99%

The broad impacts of corn stover and wheat straw removal for biofuel production on crop productivity, soil health and greenhouse gas emissions: A review

et al. 2020

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Biofuel production from crop residues is widely recognized as an essential component of developing a bioeconomy, but the removal of crop residues still raises many questions about the sustainability of the cropping system. Therefore, this study reviews the sustainability effects of crop residues removal for biofuel production in terms of crop production, soil health and greenhouse gas emissions. Most studies found little evidence that residue management had long-term impacts on grain yield unless the available water is limited. In years when water was not limiting, corn and wheat removal rates ≥90% produced similar or greater grain yield than no removal in most studies. Conversely, when water was limiting, corn grain yield decreased up to 21% with stover removal ≥90% in some studies. Changes in soil organic fractions and nutrients depended largely on the amount of residue returned, soil depth and texture, slope and tillage. Reductions in organic fractions occurred primarily with complete stover removal, in the top 15-30 cm in fine-textured soils. Soil erosion, water runoff and leaching of nutrients such as total nitrogen (N) and extractable soil potassium decreased when no more than 30% of crop residues were removed. Stover management effects on soil bulk density varied considerably depending on soil layer, and residue and tillage management, with removal rates of less than 50% helping to maintain the soil aggregate stability. Reductions in CO 2 and N 2 O fluxes typically occurred following complete residue removal. The use of wheat straw typically increased CH 4 emissions, and above or equal to 8 Mg/ha wheat straw led to the largest CO 2 and N 2 O emissions, regardless of N rates. Before using crop residues for biofuel production, it should therefore always be checked whether neutral to positive sustainability effects can be maintained under the site-specific conditions.

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Improved straw management practices promote in situ straw decomposition and nutrient release, and increase crop production

Cited by 115 publications

References 42 publications

Decomposition Characteristics, Nutrient Release, and Structural Changes of Maize Straw in Dryland Farming under Combined Application of Animal Manure

Decomposition Characteristics, Nutrient Release, and Structural Changes of Maize Straw in Dryland Farming under Combined Application of Animal Manure

Soil Organic Matter Degradation in Long-Term Maize Cultivation and Insufficient Organic Fertilization

The broad impacts of corn stover and wheat straw removal for biofuel production on crop productivity, soil health and greenhouse gas emissions: A review

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