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一、选用抗旱品种,进行抗旱锻炼抗旱品种具有适应干旱环境的形态特征,例如种子大,根茎伸长力强,能适当深播;根系发达,生长快,入土深,根冠比值大,能利用土壤深层的水分;叶片狭长,叶细胞体积小,叶脉致密,表面茸毛多,角质层厚。玉米抗旱品种叶片细胞原生质的黏性大,遇旱时失水分小,在干旱情况下气孔能继续开放,维持一定水平的光合作用。二、适期播种,中耕保墒玉米需水的特点是前期少,后期多,从播种到拔节只占一生需水总量的15%,从拔节到抽穗占
First, the selection of drought-resistant varieties for drought resistance Drought resistant varieties have adapted to the morphological characteristics of the arid environment, such as large seeds, rhizome elongation strong, appropriate deep-seeding; developed root system, grow fast, deep into the soil, root and shoot ratio, can use Deep soil moisture; narrow blade, leaf cells, small, dense veins, surface hair more, cuticle thick. Maize drought-resistant varieties of leaf cell protoplasm sticky, in the case of drought loss of water is small, in the case of drought stomata can continue to open, to maintain a certain level of photosynthesis. Second, the appropriate sowing, tillage Preservative corn water demand is characterized by less pre-and post-more, from sowing to jointing only 15% of total water demand, from jointing to heading