摘要
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。
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.
作者
李嵩
韩巍
张凯
依艳丽
LI Song;HAN Wei;ZHANG Kai;YI Yan-li(College of Land and Environment,Shenyang Agricultural University,Shenyang 110866,China)
出处
《玉米科学》
CAS
CSCD
北大核心
2020年第6期101-106,共6页
Journal of Maize Sciences
基金
公益性行业(农业)科研专项(201503116)
国家自然科学基金(41501235)。
关键词
玉米
褐土
耕作方式
土壤结构
物理性状
根系分布
Maize
Cinnamon soil
Tillage method
Soil structure
Physical property
Root distribution
