再生稻腋芽萌发与产量形成的生态研究

STUDY ON ECOLOGICAL CONDITIONS OF AXILLARY BUD

本文研究了再生稻腋芽萌发和产量形成与生态条件的关系，结果表明：１．再生稻胶芽萌发苗数与日均温和湿度呈抛物线型关系。回归方程分别为＝１８．６６０３ｘ－０．３６５７ｘ￣２－２３３．２１３５和＝６．１１８７ｘ－０．０３６９ｘ￣２－２４８．６７１６．２．头季稻齐穗后腋芽在鞘内伸长与用株间光照强度关系密切；头季稻收后的腋芽萌发期要求较多的日照时数。３．生态条件中日均温对再生稻产量的直接过应最大，其次是日照时数。４．根据四川东南部气温变化规律，再生稻９月１０前抽穗开花的安全保证率为８０％。

aving a stuly on the relationship between the ecological condition and sprouting ofaxillary bud .as well as yield of the ratooning rice .it was found that : 1. Sprouting number ofaxillary bud had a parabolic relationship with daily average temperature and relative humidityafter harvest , with the regression equations of =18. 6603x- 0. 3657x￣2-233. 2135 and =6. 1187x- 0. 0369x￣2 - 248. 6716 , respectively . and thus the suitable temperature and relativehumidity for sprouting of axillary, bud would be about 26℃ and 83% , respeetively. 2. Thestretching of axillary bud in leaf sheath had a closc relation with light intensity in plants be-fore harvest ,and a longer duration of sunshine was required for the sprouting period of axil-lary bud after harvest. 3. The daily nverage temperature was the most important in all eco-logical conditions affecting yield of the ratooning rice and the duration of sunshine was thesecond. 4. According to the weather regularity in the southeast Sichuan province , the safetyfactor was 80% to ensure that the ratooning rice flowered before Sept. 10.