Effects of straw incorporation and potassium fertilizer on crop yields, soil organic carbon, and active carbon in the rice–wheat system

Yuan, Guoyin; Huan, Weiwei; Song, Hang; Lu, Dianjun; Chen, Xiaoqin; Wang, Huoyan; Zhang, Jianmin

doi:10.1016/j.still.2021.104958

Cited by 71 publications

(68 citation statements)

References 62 publications

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“…Because of the promotion of high-yield varieties and high inputs of N and P fertilizer, K deficiency or soil K imbalance has become more widespread and critical in China, especially in the southern multi-cropping region. Paddy-upland rotation, as the main crop rotation system in the southern part of China, is mainly distributed in the rice cropping areas of the Yangtze River Basin and Huang-Huai River Basin [9,10]. However, long-term intensive cultivation removes 210-360 kg ha −1 of K 2 O per year by crop harvest and has resulted in a substantial decrease in soil available K content [11].…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have showed that crop straw returning could improve soil available K and slowly available K content. Moreover, crop straw incorporation with K fertilizer significantly improved crop yield and maintained soil health [3,10,13]. However, the decomposition rate of straw returning to the field was significantly affected by soil water content.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Long-Term Straw Management and Potassium Fertilization on Crop Yield, Soil Properties, and Microbial Community in a Rice–Oilseed Rape Rotation

Gan

Chen

et al. 2021

Agriculture

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The present study aims to assess the influences of long-term crop straw returning and recommended potassium fertilization on the dynamic change in rice and oilseed rape yield, soil properties, bacterial and fungal alpha diversity, and community composition in a rice–oilseed rape system. A long-term (2011–2020) field experiment was carried out in a selected paddy soil farmland in Jianghan Plain, central China. There were four treatments with three replications: NP, NPK, NPS, and NPKS, where nitrogen (N), phosphate (P), potassium (K), and (S) denote N fertilizer, P fertilizer, K fertilizer, and crop straw, respectively. Results showed that long-term K fertilization and crop straw returning could increase the crop yield at varying degrees for ten years. Compared with the NP treatment, the long-term crop straw incorporation with K fertilizer (NPKS treatment) was found to have the best effect, and the yield rates increased by 23.0% and 20.5% for rice and oilseed rape, respectively. The application of NPK fertilizer for ten years decreased the bacterial and fungal alpha diversity and the relative abundance of dominant bacterial and fungal taxa, whereas continuous straw incorporation had a contradictory effect. NPKS treatment significantly increased the relative abundance of some copiotrophic bacteria (Firmicutes, Gemmatimonadetes, and Proteobacteria) and fungi (Ascomycota). Available K, soil organic matter, dissolved organic carbon, and easily oxidized organic carbon were closely related to alterations in the composition of the dominant bacterial community; easily oxidized organic carbon, dissolved organic carbon, and slowly available K were significantly correlated with the fungal community. We conclude that long-term crop straw returning to the field accompanied with K fertilizer should be employed in rice-growing regions to achieve not only higher crop yield but also the increase in soil active organic carbon and available K content and the improvement of the biological quality of farmland.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Long-Term Straw Management and Potassium Fertilization on Crop Yield, Soil Properties, and Microbial Community in a Rice–Oilseed Rape Rotation

Gan

Chen

et al. 2021

Agriculture

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“…For example, small changes in soil carbon pools will affect the global carbon cycle and atmospheric carbon concentration 9 . Soil organic carbon (SOC) is a complex organic heterogeneous body 10 , and changes in SOC cannot directly and quickly reflect changes in soil quality 11 , while some labile organic C fractions, including microbial biomass C (MBC), dissolved organic C (DOC), light fraction organic C (LFOC), easily oxidizable organic C (EOC), and particulate organic C (POC), are sensitive to and respond rapidly to soil quality under different conditions 12 , 13 . Therefore, changes in different soil organic carbon fractions are considered as early indicators of changes in soil quality and carbon storage 14 .…”

Section: Introductionmentioning

confidence: 99%

Vertical and seasonal changes in soil carbon pools to vegetation degradation in a wet meadow on the Qinghai-Tibet Plateau

Wang

et al. 2021

Sci Rep

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Wet meadows provide opportunities to decrease carbon dioxide (CO2) and methane (CH4) released into the atmosphere by increasing the soil organic carbon (SOC) stored in wetland systems. Although wet meadows serve as the most important and stable C sinks, there has been very few investigations on the seasonal distributions of SOC fractions in high-altitude wet meadows. Here, we studied the effects of four vegetation degradation levels, non-degraded (ND), lightly degraded (LD), moderately degraded (MD), and heavily degraded (HD), on the measured vertical and seasonal changes of SOC and its different fractions. Among these vegetation degradation levels, 0–10 and 10–20 cm soil depths in ND plots had significantly higher SOC contents than the other degradation levels had throughout the year. This is attributed to the relatively greater inputs of aboveground plant litter and richer fine-root biomass in ND plots. Particulate organic carbon (POC) and light fraction organic carbon (LFOC) showed similar vertical and seasonal variations in autumn, reaching a minimum. Moreover, microbial biomass (MBC) and easily oxidizable organic carbon (EOC) contents were highest in summer and the smallest in winter, while dissolved organic carbon (DOC) content was highest in spring and lowest in summer, and were mainly concentrated in the 0–20 cm layer. Pearson correlation analysis indicated that soil properties and aboveground biomass were significantly related to different SOC fractions. The results indicate that vegetation degradation reduces the accumulation of total SOC and its different fractions, which may reduce carbon sink capacity and soil quality of alpine wet meadows, and increase atmospheric environmental pressure. In addition, vegetation biomass and soil characteristics play a key role in the formation and transformation of soil carbon. These results strengthen our understanding of soil C dynamics, specifically related to the different C fractions as affected by vegetation degradation levels and soil depth, in wet meadow systems.

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“…A decomposição da palhada no solo é uma fonte importante do pool de carbono orgânico do solo (SOC) (Wang et al, 2015), que também é uma etapa fundamental do ciclo do carbono no sistema planta-solo. A decomposição dos resíduos vegetais, fornece nutrientes importantes para o ciclo da cultura, facilita a retenção de água, transforma as propriedades físicas do solo e melhora a produtividade e a atividade dos organismos do solo (Yuan et al, 2021). Dessa forma, mudanças nos estoques de SOC resultam em modificações nos atributos físicos, químicos e biológicos do solo (Cherubin et al, 2016).…”

Section: Manejo Da Palhada E Carbono Orgânico Do Solounclassified

“…Zhou et al, 2015) Estudos mostraram que em clima tropical, como no caso do Brasil, onde a mineralogia de argila e o elevado grau de intemperismo resultam em baixa reserva de nutrientes, a preservação da palhada na colheita sem a queima contribui para a manutenção da fertilidade do solo podendo aumentá-la (Pinheiro et al, 2010). Assim, compreender a dinâmica do carbono orgânico do solo (SOC) é importante para a sustentabilidade de longo prazo dos agroecossistemas e do meio ambiente (Yuan et al, 2021).…”

Section: Manejo Da Palhada E Carbono Orgânico Do Solounclassified

Um estudo de caso da remoção da palhada de cana-de-açúcar do solo: quais são as implicações no conteúdo de matéria orgânica do solo?

Silva

Souza

et al. 2021

RSD

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O Brasil é o maior produtor de cana-de-açúcar do mundo. Com as mudanças nos sistemas de colheita da cana-de-açúcar, há uma quantidade expressiva de palhada que fica depositada sobre o solo, podendo contribuir para o aumento da matéria orgânica do solo (MOS). No entanto, no Brasil já existem diversas Unidades Industriais que processam toda a biomassa da cana para fabricar álcool de segunda geração e/ou gerar energia elétrica, tornando-se assim, uma nova fonte de renda das Usinas e Destilarias. Ao processar toda a biomassa gerada pela cana-de-açúcar, os possíveis efeitos favoráveis sobre as propriedades químicas, físicas e biológicas do solo serão retardados. Vale destacar que a matéria orgânica determina os principais atributos que definem a qualidade do solo, sendo diretamente afetada pelas práticas de manejo. Por meio do estudo da qualidade da matéria orgânica, pode-se além de avaliar a qualidade do solo, ter uma maior compreensão do sistema de produção que este solo comporta. Diante do exposto, o objetivo do presente trabalho, foi de estudar os principais efeitos da retirada da palhada da superfície dos solos no conteúdo de matéria orgânica do solo, indicando estudos que apontam a quantidade ideal de palhada a ser deixada no solo, sem afetar o conteudo de matéria orgânica. Para isto, foi realizado uma intensa busca em bases de dados, de estudos que avaliaram as possíveis implicações da retirada total e parcial da palhada de cana.

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Effects of straw incorporation and potassium fertilizer on crop yields, soil organic carbon, and active carbon in the rice–wheat system

Cited by 71 publications

References 62 publications

Effects of Long-Term Straw Management and Potassium Fertilization on Crop Yield, Soil Properties, and Microbial Community in a Rice–Oilseed Rape Rotation

Effects of Long-Term Straw Management and Potassium Fertilization on Crop Yield, Soil Properties, and Microbial Community in a Rice–Oilseed Rape Rotation

Vertical and seasonal changes in soil carbon pools to vegetation degradation in a wet meadow on the Qinghai-Tibet Plateau

Um estudo de caso da remoção da palhada de cana-de-açúcar do solo: quais são as implicações no conteúdo de matéria orgânica do solo?

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