宜宾烟区土壤耕作方式对土壤耕层物理性状的影响

为探明不同耕作方式对宜宾烟区耕层土壤物理性状影响,本文通过定点试验,以常规耕作(CK)为对照,分别设置免耕(T1)、压实+翻耕25cm(T2)、翻耕25cm(T3)三种耕作措施,测定项目包括土壤含水量、容重和紧实度。结果表明：(1)翻耕能显著提高0～20cm耕层土壤含水量；(2)翻耕处理有助于降低耕层土壤容重大小；(3)翻耕处理可以有效降低土壤紧实度。表明翻耕能有效改善宜宾烟区耕层土壤结构,使得深层土壤结构变疏松,提高了土壤含水量,降低了土壤容重和紧实度,从而有利于农作物的生长发育。

Effects of soil tillage practices on physical properties of plough layer in Yibin tobacco area

In order to find out the effects of different tillage methods on the physical properties of topsoil in Yibin tobacco area, this paper set up three tillage measures, namely no-tillage (T1), compaction+plough tillage 25cm(T2) and plough tillage 25cm(T3), through experiments, and compared with conventional tillage (CK). The measured items included soil water content, soil bulk density and soil compaction. The results show that: (1) Plough tillage can significantly increase the soil water content in 0 ~ 20 cm plough layer; (2) Plough tillage treatment is helpful to reduce the bulk density of plough layer; (3) plough tillage treatment can effectively reduce soil compaction. The results showed that plough tillage can effectively improve the plough layer structure in Yibin tobacco area, make the deep soil structure loose, increase the soil water content, and reduce the soil bulk density and soil compaction, which is beneficial to the growth and development of crops.