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近年来国内外大量研究表明，作物根系分布较深，且多纵向时，叶片趋向直立；深根型品种在干旱地区具有较好的适应性；深层根系可延缓植株衰老；种子根和下层根量对产量提高有显著作用。影响根系生长和分布的主要因素是品种、水分、施肥、密度和土壤环境
In recent years, a large number of studies at home and abroad show that the root distribution of crops is deeper and the leaves tend to stand upright in more longitudinal directions. Deep rooted varieties have good adaptability in arid areas. Deep roots can delay the plant senescence. Have a significant effect on the yield increase. The main factors affecting root growth and distribution are variety, moisture, fertilization, density and soil environment