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Gained net ecosystem economic benefit in machine-transplanted double-cropped rice strategies

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Nutrient Cycling in Agroecosystems Aims and scope Submit manuscript

Abstract

Machine-transplanted rice with side-deep fertilization (MRSF) can partially compensate for the negative environmental impacts of traditional rice cultivation methods. However, its effects on net ecosystem economic benefit, greenhouse gas emissions, and carbon footprint have not been extensively assessed. We conducted a two-season field experiment to investigate the effects of MRSF in paddy fields on greenhouse gas emissions, global warming potential, carbon footprint, grain yield, and net ecosystem economic benefit. Six treatments with different N application rates (0/0, 90/99, 105/116, 120/132, 135/149, and 150/165 kg N ha−1) were applied to early season rice and late-season rice. The results indicated that under MRSF, soil CH4 and N2O emissions were significantly lower (by 13.2–45.6% and 5.4–28.7% in early season rice and 21.3–42.3% and 19.1–35.6% in late-season rice, respectively) than those under conventional fertilization. Chemical fertilizer was the largest contributor to greenhouse gas emissions from agricultural inputs for the early season and late-season rice. Additionally, MRSF mitigated soil CH4 and N2O emissions and ultimately reduced the total greenhouse gas emissions. The net ecosystem economic benefit of MRSF was significantly higher (by 16.3–25.7% and 23.4–29.7% for the early season and late-season rice, respectively) than that under conventional fertilization. Overall, MRSF is an economically beneficial approach with low environmental impact for commercial rice cultivation.

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Acknowledgements

This study was supported by the National Key Research and Development Project—the Development and Application of Slow Controlled-release Fertilizer Coating with Polyether Polyurethane (2017YFD200703-3), the National Technical System of Rice Industry (CARS-01-26), the Hunan Innovation Fund of Agricultural Science and Technology (2019LS03-3), and the Hunan Youth Fund of Natural Science Foundation (2019JJ50337).

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Correspondence to Ying Huang or Jianwei Peng.

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Zhong, X., Zhou, X., Fei, J. et al. Gained net ecosystem economic benefit in machine-transplanted double-cropped rice strategies. Nutr Cycl Agroecosyst 124, 1–15 (2022). https://doi.org/10.1007/s10705-022-10218-0

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  • DOI: https://doi.org/10.1007/s10705-022-10218-0

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