摘要
经1987～1989年三年对水稻收割前后腋芽伸长萌发与生态条件关系研究得出如下结伦:①头季稻收获前腋芽在鞘内增长与稻株间光照强度关系密切,头季稻收后腋芽萌发期要求较多的日照时数;②头季稻收后腋芽伸长萌发与温度、湿度间相关极显著,γ分别为0.9992和0.9989,其轨迹呈抛物线。曲线回归方程为γ=-233.2135+18.6603x-0.3657x^2和γ=-248.6716+6.1187x-0.0369x^2,即腋芽萌发伸长的适温度为26℃左右,相对湿度为84％;③头季稻收后腋芽萌发最高苗数与再生稻有效穗数呈极显著正相关,γ=0.9475。有效穗数与再生稻产量是极显著正相关,γ=0.9035;④头季稻茎秆重可作为选育强再生力品种的指标之一。
A Study of the relationship between sprouting of axillary bud and ecological condition after the first harvest of rice had been conducted in 1987-1989. The results showed thati (1)The sprouting of axillary bud in leaf sheath of the ratooning rice had a close relation with the light intensity of plants before harvest, more duration of sunshine was required when the Period of sprouting of axillary bud after harvest. (2) The sprouting of axillary bud had a significant correlation with temperature and humidity after harvest. Respectively, the correlation coefficients were r = 0.9989 and r = 0.9992. Its locus showed Parabola shape. The curve regression equations were:
y=-233.2135 + 18.6603x-0.387Sx2 y= -248.6716 + 6.1187x-0.0369x2
The Preference temperature and humidity for the sprouting of axillary bud were about 26℃ and 84% respectively. (3) There was a significant Positive correlation Detween the number of Productive Panicle and the number of muximum seedling, also the yield of ratooning rice, the correlation coefficients were r = 0.9475 and r = 0.9035 respectively. (4) The stem weight of the first season rice had a significant positive correlation with the length of axillary bud, which could be regarded as one index of breeding improved varieties with Powerful aftermathig qualities.
出处
《西南农业学报》
CSCD
1990年第2期27-32,共6页
Southwest China Journal of Agricultural Sciences
关键词
水稻
腋芽
萌发
生态条件
Rice, Ratooning rice, Axillary bud, Ecological condition, Aftermathing puality, Sichuan
