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最近几年,我们学习外地经验,采用直播法进行红麻短光照制种,虽然解决了不结实问题,但生产成本高,大面积推广有困难。1977年我们在营山县三溪公社进行改红麻直播短光照制种为插梢短光照制种试验,获得了成功。1978年这个公社共建床425个,合面积4亩,产种1,010斤,平均亩产252斤。同年,全地区推广26,000多床,普遍收到了好效果。实践证明,红麻插梢短光照制种比直播短光照制种有几个优点:(1)遮光期短,管理省工。直播法一般需连续遮光35—40天,而插梢法利用上部枝条比实生幼苗对光照反应敏感的特点,遮光时间只需25—30天,即可正常现蕾开花,很少逆转为营养生长状态;(2)种子产量高,成本低。据试验,插梢的单株座果数为30个左右,直播法只有10个左右,因此种子产量一般比直播的增产50%,生产成本降低40%左右; (3)通过精细选梢,有利于品种
In recent years, we have learned field experiences and conducted live-broadcast short kenaf weeds to solve the unsmooth problem. However, it is difficult to promote large-scale popularization because of high production costs. In 1977, we changed the short-light illumination system of kenaf in Sanxi Commune of Yingshan County for the experiment of short shining of plug shoots and achieved success. In 1978, the commune built 425 beds, with an area of 4 mu and a yield of 1,010 kg, with an average yield of 252 kg per mu. In the same year, the promotion of more than 26,000 beds in the entire region generally received good results. Practice has proved that kenaf shoots short-light short-sowing than short-sowing direct broadcast has several advantages: (1) blackout period is short, the management of labor-saving. The direct seeding method generally requires 35-40 days of continuous shading, while the plugging method uses the upper branches to be more sensitive to light than the live seedlings. The shading time is only 25-30 days, State; (2) high seed yield and low cost. According to the test, the number of per plant per plant is about 30 and the direct seeding method is only about 10, so the seed yield is generally 50% more than the direct seeding and the production cost is reduced by 40%. (3) Through the fine selection, there are Conducive to variety