不同耕作方式对辽西褐土物理性状及玉米根系分布的影响

通过连续3年大田试验，对旋耕、翻耕、深松3种耕作方式下的土壤物理性质、玉米根系分布和产量进行测定。结果表明，与翻耕和旋耕相比，深松显著增加了玉米田土壤耕层厚度和降低了犁底层厚度。在中下层土壤，深松还降低了土壤紧实度和容重，改善了土壤的孔隙状况，有利于玉米根系向下生长，使得中下层土壤的玉米根系不仅更丰富，而且占总根系量的比例也更高，最终提高了玉米产量。本研究表明，深松耕作有利于改善辽西褐土区土壤结构和促进玉米生长。

Effect of Different Tillage Methods on Soil Structure and Maize Root Distribution in Cinnamon Soil Area in Western Liaoning

In this study, the soil physical properties, distribution of maize roots and maize yield were measured by field experiments under three-year continuous rotary tillage, plowing tillage and deep loosening, respectively. The results showed that, compared with plowing tillage and rotary tillage, deep loosening significantly increased the top-soil thickness and decreased the subsoil thickness. In the middle and lower layers of soil, deep loosening also reduced soil compaction and bulk density, improved soil porosity, and was conducive to the downward growth of maize roots. Thus the maize roots in the middle and lower layers of soil are not only richer, but also account for a higher proportion of the total root quantity. This study indicated that deep loosening is beneficial to improve soil structure and promote maize growth.