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昼夜相对长度对植物开花的效应称为光周期现象。按植物对昼夜相对长度的不同反应,可分为长日照植物和短日照植物。红麻是短日照植物,一般说来,南麻北植,在北方相对较长日照条件下,营养生长旺盛,可比北麻品种增产2～3成。但南麻品种在北方大都不能开花结实,不能就地留种。为了解决这个问题,我们根据光周期理论,用短光照处理方法,研究南麻北方留种的具体措施和应用价值。试验方法以南选和7435为试材,研究影响南麻短光照处理留种产量的诸因素。如春、夏播短光照处理所需天数;开始短光照处理的适宜苗龄;苗床密度和打顶适期;短光照处理过程中喷矮壮素的作用。为了降低制种成本,也研究了苗床大小和遮光物多次利用等措施。
The effect of the relative length of day and night on plant flowering is called photoperiodicity. According to the different responses of plants to the relative lengths of day and night, they can be divided into long-day plants and short-day plants. Kenaf is a short-day plant, in general, South Ma North plantations, in the northern relatively long sunshine conditions, vegetative growth, yield more than North Ma 2 to 3 percent. However, most varieties of South Maize can not flowering in the north, can not stay on the spot. In order to solve this problem, according to the photoperiod theory, we used the short-light treatment method to study the concrete measures and application value of the southern species of Nannan. The test was conducted with South selection and 7435 as test materials to study the factors that affect the short-stay treatment of Nanmao. Such as spring and summer sowing days, the appropriate number of days required for treatment; short seedling age suitable for starting seedling; seedbed density and topping appropriate period; short photoperiod Penicillin role. In order to reduce the cost of seed production, we also studied the measures such as the size of seedbed and the use of shades repeatedly.