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施正发,袁奎,黄宁,等.不同耕作方式对植烟土壤团聚体分布及稳定性的影响[J].农业工程,2024,14(6):118-123. DOI: 10.19998/j.cnki.2095-1795.2024.06.020
引用本文: 施正发,袁奎,黄宁,等.不同耕作方式对植烟土壤团聚体分布及稳定性的影响[J].农业工程,2024,14(6):118-123. DOI: 10.19998/j.cnki.2095-1795.2024.06.020
SHI Zhengfa,YUAN Kui,HUANG Ning,et al.Effects of different tillage methods on distribution and stability of aggregate in tobacco growing soil[J].Agricultural Engineering,2024,14(6):118-123. DOI: 10.19998/j.cnki.2095-1795.2024.06.020
Citation: SHI Zhengfa,YUAN Kui,HUANG Ning,et al.Effects of different tillage methods on distribution and stability of aggregate in tobacco growing soil[J].Agricultural Engineering,2024,14(6):118-123. DOI: 10.19998/j.cnki.2095-1795.2024.06.020

不同耕作方式对植烟土壤团聚体分布及稳定性的影响

Effects of Different Tillage Methods on Distribution and Stability of Aggregate in Tobacco Growing Soil

  • 摘要: 为探究植烟土壤团聚体分布及稳定性对不同耕作方式的响应,以丘陵烟区烟田黄壤土为研究对象,通过田间定位试验,设置深松1遍(T1处理)、常规旋耕2遍(T2处理)和翻耕1遍+旋耕1遍(T3处理)3个处理,研究不同耕作方式对植烟土壤团聚体分布及稳定性的影响,包括对力稳定性团聚体含量、水稳定性团聚体含量、团聚体平均质量直径、水稳性团聚体稳定率、构体破碎率和不稳定团粒指数的测定与分析。结果表明,与T3处理相比,T1T2处理可使0~20 cm土壤层的>0.25~2.00 mm粒级团聚体的力稳性团聚体数量显著提高,>20~30 cm土壤层的>0.25 mm粒级团聚体的力稳性团聚体数量显著提高。T1T2处理可使0~10和>20~30 cm土壤层的平均质量直径(干筛)值,以及0~30 cm土壤层的平均质量直径(湿筛)值显著提高。T1处理可使0~10 cm土壤层的水稳性团聚体稳定率增大,而T2处理可使>10~20和>20~30 cm土壤层的水稳性团聚体稳定率增大。采用T1T2处理的耕作方式将有助于贵阳市典型丘陵烟区植烟土壤团聚体形成和稳定性的提升,该研究为优化丘陵烟区耕作方式提供理论支撑。

     

    Abstract: In order to explore response of distribution and stability of tobacco planting soil aggregates to different tillage methods, yellow loam soil in hilly tobacco area was taken as research object.Through field positioning test, three treatments were set up : subsoiling once(T1), conventional rotary tillage twice(T2)and conventional tillage once + rotary tillage once(T3).Effects of different tillage methods on distribution and stability of tobacco planting soil aggregates were studied, content of force-stable aggregates, content of water-stable aggregates, average weight diameter of aggregates, stability rate of water-stable aggregates, breakage rate of aggregates and unstable aggregate index were measured and analyzed.Results showed that, compared with T3 treatment, T1 and T2 treatment could significantly increase number of force-stable aggregates of 0.25 to 2.00 mm aggregates in 0 to 20 cm soil layer, and number of force-stable aggregates of > 0.25 mm aggregates in >20 to 30 cm soil layer.Average weight diameter( dry sieve )value of 0 to 10 cm and >20 to 30 cm soil layer and average weight diameter( wet sieve )value of 0 to 30 cm soil layer were significantly increased in T1 and T2 treatment.Stability rate of water-stable aggregates in 0 to 10 cm soil layer was increased in T1 treatment, while stability rate of water-stable aggregates in >10 to 20 cm and >20 to 30 cm soil layers was increased in T2 treatment.The use of T1 and T2 treatment tillage methods would contribute to formation and stability of soil aggregates in typical hilly tobacco growing areas of Guiyang City.This study could provide theoretical support for optimizing tillage methods in hilly tobacco growing areas.

     

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