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在大田和盆栽条件下,研究了种植密度对冬小麦根系的影响。单株次生根随密度增加而减少,且因生育期进展其影响更为显著;群体(?)生根量生育前期与密度呈正相关,生育后期处理间差异不显著。根干重的变化趋势与次生根相同。根系的垂直分布,密植处理拔节前发展较快;而稀播在生育后期发展迅速,(?)深层根比较发达。稀播小麦的根系活力强于密植的。单株次生根数、根重均与单株穗粒数、粒重呈正相关关系。所以,适当稀播可以培育壮根,增强根系活力,充分发挥土壤、特别是深层土壤的作用。
The effects of planting density on the root system of winter wheat were studied under field and potted conditions. The secondary root of single plant decreased with the increase of density, and its effect was more significant due to the growth stage. The rooting amount of population (?) Had a positive correlation with density at early growth stage and no significant difference at the later growth stage. Root dry weight changes with the same secondary root. The vertical distribution of root system, dense planting rapid development before jointing; and thinning sowing rapid development in late growth, (?) Deep roots more developed. Sowing wheat root vigor is stronger than close planting. The number of secondary roots and root weight per plant had a positive correlation with the number of grain per plant and grain weight. Therefore, the appropriate thinning can cultivate strong roots, enhance root activity, give full play to the soil, especially the role of deep soil.