夏季不同日龄的水稻芽撒播对成苗的影响

夏季对稻种露白及露白后1~5 d不同日龄的水稻芽撒播,研究了各处理的成苗情况。结果表明:种子露白后催芽1~2 d撒播,能明显促进苗期的生长发育,提高成苗率,但不能促进水稻抽穗期提前。露白后催芽2 d撒播的成苗率(66.5%)较稻种露白撒播的成苗率(54.1%)提高了12.4%。种子露白后催芽2 d再炼芽1~2 d撒播,能明显促进水稻苗整个生长期间的生长发育,成苗率大幅度提高;与露白后催芽2 d撒播处理相比,成苗率提高19.2%,苗期叶龄提早0.9片以上,3.0叶期、分蘖期、抽穗期分别提早4 d、4 d和3 d。本研究结果还显示,多条不定根伸出后撒播,成苗率会大幅度下降。

Effects of Scattering of Different-day Old Rice Buds on Seedling Formation in Summer

The effects of scattering of different-day old rice buds on seedling formation in summer were studied.The results showed that the seeds germinated for 1-2 days scattered transplanting,which can significantly promote the growth during early seedling development and increase the seedling formation rate,while this treatment can not promote heading date advance.The seedling formation rate of germinated rice seeds was 54.1%,and that of germinated for 2 days old seeds was 66.5%.Germinating for 2 days old and then...