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1 改直播为营养钵育苗移栽1.1 营养钵育移的效果过去玉米制种采用直播法,虽省工省时,但因整地质量,土壤含水量,播种深度等因素,往往达不到高产播期,加之鼠鸟害等因素的影响,缺苗断垄和大小苗并存现象严重,不能达到一播全苗的技术要求。直播改为营养钵育移栽后,便于集中管理,适时壮苗移栽,不但能保证单位面积制种的株数,而且苗齐苗壮。营养钵667m~2株数比直播提高7%,植株高度比直播矮4.7cm,穗位高度平均降低5cm;穗长平均增加4.2cm;穗粗增加0.8cm;秃顶率减少9.0%;穗粒平均每穗增
1 changed live to nutrition bowl seedling transplanting 1.1 The effect of nutrition bowl transplanting Past production of corn seed by direct seeding method, save time and labor, but due to site preparation quality, soil moisture, planting depth and other factors, often fail to high-yield Period, combined with the effects of mouse and bird diseases and other factors, the lack of seedlings off the ridge and the size of seedlings co-exist serious, can not achieve the technical requirements of a broadcast seedlings. Live broadcast to nutrition bowl after transplanting, easy to centralized management, timely seedlings transplanting, not only to ensure the number of seed per unit area, and Miao Miao Miao Zhuang. The number of 667m ~ 2 vegetative pots was 7% higher than that of direct seeding, the plant height was 4.7cm shorter than that of direct seeding, the average height of ear position was reduced by 5cm, the average spike length was 4.2cm, the ear diameter was 0.8cm, the rate of bald top was 9.0% Spike increase