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1 母本直播制种的优点1.1 增产显著育苗移栽—般用种量为45～56kg,/hm~2,秧龄18～20d,5.5～6.5叶左右移栽,栽培密度为50万穴/hm~2左右,基本苗150万～180万/hm~2,成穗270万～300万/hm~2。采用直播技术一般用种量为55～60kg/hm~2,属于超稀播量,营养面积大,个体发育好,低节位分蘖多,成穗可达330万/hm~2以上,比移栽田多30万～60万/hm~2;而且主穗差异小,抽穗整齐,开花集中,增产增益较为明显。2000～2001年全县协优559制种,直播田平均单产为2.93t/hm~2,移栽田为2.70t/hm~2,增产0.23t/hm~2,增幅达9.2%。经多年实验对比,水直播一般比育苗移栽增产6%～12%。
1 The advantages of mother-sowing seed production 1.1 Significant increase in transplanting Seedling - As the use of the amount of 45 ~ 56kg, / hm ~ 2, seedling age 18 ~ 20d, 5.5 ~ 6.5 leaf transplanting, planting density of 500000 points / hm ~ 2 or so, the basic seedlings 1.5 million ~ 1.8 million / hm ~ 2, into the ear 2.7 million ~ 3 million / hm ~ 2. The direct seeding technology is generally used in an amount of 55 ~ 60kg / hm ~ 2, belonging to the ultra-thin sowing, large area of nutrition, individual development is good, low node tillers and more, ear up to 3.3 million / hm ~ 2, Transplanting more 300000 ~ 600000 / hm ~ 2; and the main difference between the ear, heading and tidy, flowering concentrated, increase yield more obvious. The average yield of direct seeding field was 2.93 t / hm ~ 2 in 2000 ~ 2001 in Guanyou 559, 2.70 t / hm ~ 2 in transplanting field and 0.23 t / hm ~ 2 in increasing yield, an increase of 9.2%. After many years of experimental comparison, water-borne transplanting seedlings generally yield 6% to 12%.