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在玉米自交系繁殖制种过程中,由于种植密度大,每亩达4000～5000株,抽雄吐丝期植株中下部叶片相互重迭荫蔽,第一雌穗下2～3叶斜披伸展遮盖别株雌穗花丝的现象很普遍,严重的影响作物的光合作用和授粉结实,使繁殖,制种产量不高,种子质量低劣。因此,自1979年以来我们作了人工“垮叶”试验,即将遮盖花丝的叶片齐叶舌处垮下(仅折断叶中脉,叶片下垂),结果每株实际垮穗下叶2～3片,亮出花丝,促进了授粉结实。当年垮叶1.18亩自330,收到
In maize inbred lines in the breeding process, due to the planting density, up to 4000 ~ 5000 per acre, tassel sprouting silkworm middle and lower leaves overlap each other shade, the first ear 2 to 3 slopes drape stretch cover Other strains of the female filaments are very common, seriously affecting crop photosynthesis and pollination, so that reproduction, seed production is not high, poor seed quality. Therefore, since 1979, we made artificial “leaf-breaking” test, which covered the filaments of the leaves jagged tongue collapse (only break the leaf veins, sagging leaves), the results of each plant actually fall leaves 2 to 3, Show filament, and promote pollination. 1.18 mu of fall leaves that year since 330, received