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首页> 外文期刊>Applied Mechanics and Materials >Paddy Soil Profile Distribution of δ~(13)C Subjected to Rice Straw Amendment and Burning
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Paddy Soil Profile Distribution of δ~(13)C Subjected to Rice Straw Amendment and Burning

机译：稻草改良和燃烧作用下δ〜（13）C的水稻土剖面分布

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Paddy residues are the most generous agricultural biomass from the paddy cultivation, Paddy residues practices include crop residue amendment and in-situ burning. It indicated that residue amendment increased the organic carbon and nutrient contents in soil, However, an open residue burning is still a common practice in Thailand despite of strict law enforcements and proper education to farmers about its implications on soil, human and animal health The present study determined how residues management practices: residue amendment and stubble burning, influence the soil organic carbon by determining δ~(13)C in paddy soil profile. The 30 cm depth soil samples from the naturally straw amendment and stubble burning paddy fields were collected in Chiang Khwan district, Roi-et province during 2017. The δ~(13)C values with soil depth showed that residue management practices produce statistical differences in both soils. The δ~(13)C values of soil samples from amendment and burning sites ranged from-23.19‰ to-17.98‰ and-24.79‰ to-19.28‰, respectively. Carbon isotopes differentiate clearly between amendment site (more positive values) and burning site (more negative values). The results from this study were in accordance with literatures which reported that the δ~(13)C distribution in the soil profile can be applied to study in SOC dynamics as a result of different paddy residue management practices (amendment or burning). Further research is needed to confirm the validity of the stable carbon isotope technique in this type of studies.
机译：稻田残留物是水稻种植中最丰富的农业生物质，稻田残留物的做法包括作物残渣改良和现场燃烧。它表明，残留物改良剂增加了土壤中的有机碳和养分含量。然而，尽管有严格的执法和对农民进行有关其对土壤，人类和动物健康影响的适当教育，但露天残留物焚烧仍是泰国的普遍做法。研究确定了残留物管理实践：残留物修正和发茬燃烧，通过确定稻田土壤剖面中的δ〜（13）C来影响土壤有机碳。 2017年，在Roi-et省Chiang Khwan地区收集了30 cm深度的天然稻草改良和茬茬稻田土壤样品。土壤深度的δ〜（13）C值表明，残留物管理实践产生了统计学差异。两种土壤。改良区和燃烧区土壤样品的δ〜（13）C值分别在-23.19‰至-17.98‰和-24.79‰至-19.28‰之间。碳同位素在修饰位点（更多的正值）和燃烧位点（更多的负值）之间有明显区别。这项研究的结果与文献报道相符，因为不同稻田管理措施（修正或燃烧）的作用，土壤剖面中的δ〜（13）C分布可用于SOC动力学研究。在这种类型的研究中，需要进一步的研究来确认稳定碳同位素技术的有效性。

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