摘要
确定单位面积内的最适播量是采用母本撒播技术进行杂交稻春、夏季制种，获得高产群体的关键措施之一。经过对Ｖ２０Ａ、珍汕９７Ａ不同播量的试验表明：威优６４、汕优６４撒播制种中，单位面积母本植株成苗数与该面积的制种产量、有效穗数、总颖花数呈极显著的正相关。并提出了决定母本最宜播量的公式为ｇ／ｍ２＝１３０÷发芽率÷成秧率×粒重。
Determining optimum seeding rate(OSR)is one of the key techniques to establish high-yielding population structure in the hybrid seed production with the female parent by direct seeding culture ormaternal direct seeding culture. The results of the experiment on different seeding rates of V20A and Zhen-shan 97 A in the seed production of Weiyou 64 and Shanyou 64 indicated that in a unit area the number of theseed parent’s adult plants was positively correlated significantly at 1% level with seed yield,the number ofproductive panicles and the number of spikelets. Based on 130 as the optimum number of main culms per m2with 3.5～4.0 tillers a main culm, the OSR is derived and the empirical formula is: OSR(g/m2)=130÷ger-mination rate%÷adult seedling rate%×seed weight(g/se).
出处
《杂交水稻》
CSCD
北大核心
1994年第5期13-15,共3页
Hybrid Rice
关键词
杂交稻制种
母本撒播
播量
产量
hybrid rice seed production
maternal direct seeding culture
seeding rate
