1 制种田选择应选择地势平坦、通风向阳、排灌方便、土壤肥沃、无黄枯萎病的高产地块作为制种田,尤以前3年内无种植棉花史的粮食作物高产田更佳。 2 提前晒种,适期早播亲本种子播前晒种2～3d。我县地膜覆盖直播适期为4月15～22日,育苗移栽田可提前到4月5～10日播种。在适播期内力争早播,达到壮苗早发。为确保苗全、齐、匀、壮,提 1 system of farming should choose flat topography, ventilation, convenient irrigation and drainage, fertile soil, yellow blight-free high-yield plots as farming, especially in the past three years without planting cotton history of high-yielding grain crops is better. 2 early sunburn, early sowing suitable early sowing seed 2 ~ 3d. Film mulching live coverage of our county for April 15 to 22, transplanting seedlings can be planted in advance April 5 to 10. In the sowing period and strive to early sowing, early strong seedlings. In order to ensure the seedlings, Qi, uniform, strong, mention