上农黑糯生育特点的研究

A STUDY ON THE CROWTH CHARACTERISTIC OF SHANG NONG BLANK GLUTINOUS RICE

上海地区栽培上农黑糯已有数年，上海农学院特种稻课题组对该品种进行了生育特点的研究，结果表明该品种在本市作单季稻栽培时全生育期要求总积温达３６００℃以上，属早熟晚粳类型，其全生育期有完全叶１８张，不同播种期栽培叶龄有明显变化。该品种分蘖力偏弱，伸长节数稳定为５节，茎基部节间紧凑而粗壮，拔节和幼穗分化齐头并进，穗型较大但松散，结实率随灌浆期环境条件变化而变化。

Shang Nong black glutinous rice was cultivated a few years ago in shanghai, the experments were carried out constantly on the growth characteristic of the variety by researcher of special rice in Shanghai Agricultural College. The results showed that the variety for single cropping rice needed total accumulated temperature about 3600 C during total growth period in Shanghai, was early maturity and later nonwaxy rice, there were eighteen complete leaves druing total growth period, the leaf age was obvious changes in different seeding stages, the tillering capacity of the variety was thinner,elongation node was five, caudex internode was dense and strong, elongation and young panicle differentiation began at same time, the panicle was bigger, but lax, setting rate changed with changes of environment during the milk stage.