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    土壤深耕与秸秆还田对土壤物理性状及烟叶产质量的影响

    Effects of Deep Soil Tillage and Straw Returning on Soil Physical Properties and Yield and Quality of Tobacco Leaves

    • 摘要: 为探明江西典型植烟区适宜耕作方式,改善烟区土壤理化性质,在稻烟轮作区开展田间试验研究深耕对土壤物理性状、烤烟生长与烟叶产质量的影响。结果表明,在5~10 cm土层,秸秆还田显著降低了土壤容重、增加了土壤总孔隙度、毛管孔隙和通气孔隙;在20~25 cm土层,深耕和秸秆还田均显著降低了土壤容重,提高了土壤通气孔隙。深耕显著降低了土壤的贯穿阻力,秸秆还田通过增加5~10 cm土层≥2 mm团聚体的含量进而增加了土壤大团聚体的比例。深耕和秸秆还田均能提高烟株根茎叶的干物质量、促进其对氮磷钾的吸收,以深耕处理与深耕+秸秆还田处理效果更显著。深耕和秸秆还田显著提高了烟叶产量、产值和烟叶评吸总分。利用圆盘犁深耕土壤结合水稻秸秆还田是改良植烟土壤、提高烟叶产质量的可行技术措施。

       

      Abstract: In order to find out the suitable tillage methods in Jiangxi typical tobacco-growing areas, and to improve the soil physical and chemical properties in tobacco-producing areas, a field trial was carried out in the rice-tobacco rotation area of Jiangxi Province. The results showed that in the 5-10 cm soil layer, straw returning significantly reduced soil bulk density, increased soil total porosity, capillary porosity and aeration porosity; in the 20-25 cm soil layer, deep tillage and straw returning significantly reduced soil bulk density and significantly increased soil aeration porosity. Deep tillage significantly reduced the penetration resistance of the soil and straw returning to the field increased the proportion of large aggregates of soil by increasing the content of aggregates ≥2 mm in 5-10 cm soil layer. Deep tillage and straw returning increased the dry matter content of tobacco root, stem and leaf, and promoted the absorption of nitrogen, phosphorus and potassium. The effects of deep tillage and deep tillage combined with straw returning were more significant than the other treatments. Deep tillage and straw returning significantly increased tobacco yield, output value and total tobacco smoking score. In Jiangxi Province, it is a feasible technical measure to improve tobacco planting soil and tobacco yield and quality by deep ploughing soil with disk plow combined with rice straw returning.

       

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