【摘要】 采用自然条件分期播种与定光试验结合,研究57份红麻不同类型品种的光温反应特性。结果表明:(一)分五期播种,无论何期播种,供试红麻品种的现蕾期出现在9月中、下旬;播种后约60天;介于上述二者所需日数之间等三类。(二)根据红麻品种的感光感温特性和最短营养生长期,可将供试品种分为12种光温反应类型。(三)不同光长和不同温度对麻株生长速度的影响因品种而异。自播种到现蕾的活动积温变化与品种感温性密切相关。更多还原

【Abstract】 From 1981 to 1984, the study was carried out on the characteristics of response of 57 kenaf cultivars of different types to daylength and temperature by sowing at different times under natural condition and controlled daylength. The results were as follows:1. Kenaf was sown in 5 groups at different times. In each group, the tested cultivats could be divided into 3 types according to the flower budding time: (a) from the third week.to last week of September; (b) about 60 days after sowing; and(c) the intermediate type with its flower budding time between the above two.2. According to the sensitivity to daylength, temperature and the shortest vegetative period, the cultivars tested were divided into 12 types.3. With different daylength, the growth rates of plants of cultivar No. 722 etc. varied greatly, while those of No. 71-4 etc. varied insignificantly. The effect of temperature on the growth rate was strong with cultivars No. 722 and Qingpi No. 3, medium with Xianghong No. 2 and weak with No. 71-4. The variation of active accu- mulated temperature from sowing till budding was closely correlated with temperature sensitivity.更多还原