Response of Rice to Small Differences in Length of Day
Response of Rice to Small Differences in Length of Day
复制标题
水稻对日照长度微小差异的反应
作者：
E. Njoku
DORE 1最近报道了一种马来亚水稻的反应，一种水稻的“籼稻”品种，到光周期的微小差异。我在西非高地栽培稻、水稻品种和水稻品种中也得到了类似的结果。和光果稻（Oryza glaberrima Steud.）后者是北方尼日利亚种植的主要本地水稻。在5 ~ 10月间对两个品种的O.伊巴丹-北纬7° 26′-出苗时间与播期有显著差异，晚播开花早。伊巴丹的日出和日落之间的时间从12月的11小时40分到6月的12小时33分不等。
DORE1 has recently reported the response of a Malayan rice, an ‘indica’ variety of Oryza sativa L., to small differences in photoperiod. I have obtained similar results with West African upland cultivated rices, varieties of Oryza sativa L. and Oryza glaberrima Steud. The latter is the main indigenous rice cultivated in Northern Nigeria. Monthly sowings (May to October) of two varieties of O. glaberrima in Ibadan—latitude 7° 26′ N.—showed marked variation in time to ear emergence from sowing date, the later sowings flowering earlier. The time between sunrise and sunset at Ibadan varies from 11 hr. 40 min. in December to 12 hr. 33 min. in June.