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大白菜地膜覆盖栽培,能够使根系生长加速、活力增强。在播种后92天和对照相比,根系增多22.6—24.2%;根茎直径增加5.4—5.7%;根重增高15.85—18.89%;伤流量增加13.46—38.95%;根系活跃吸收面增大47.7—65.5%。地膜覆盖对大白菜地上部的生长、叶面积增大及光合强度亦有较大的促进。播后45天的大白菜全株重量比对照增加100%叶面积增大25.99—59.35%;播后38—68天之间净光合率增高9.5—44.9%。由于覆盖大白菜具有上述良好作用,最后引起产量提高21.72—25.82%(每公顷平均增产18.75吨),同时也提高了大白菜的品质及等级。
Chinese cabbage film cultivation, can accelerate root growth, increased vitality. 92 days after sowing, the roots increased by 22.6-24.2% compared with the control; the root diameter increased by 5.4-5.7%; the root weight increased by 15.85-18.89%; the injury increased by 13.46-38.95%; the active absorption surface increased by 47.7-65.5 %. Plastic film mulching on the growth of the upper part of the cabbage, leaf area increased and photosynthetic intensity is also greatly promoted. The total plant weight of Chinese cabbage after sowing 45 days increased by 100% compared with the control, and the leaf area increased by 25.99-59.35%. The net photosynthetic rate increased by 9.5-44.9% after sowing for 38-68 days. Due to the above good effect of covering Chinese cabbage, it eventually led to an increase of 21.72-25.82% of output (an average increase of 18.75 tons per hectare) and the quality and grade of Chinese cabbage.