论文部分内容阅读
1.水稻生长锥分化过程的形态特征和其他禾本科具有圆锥花序的植物如高粱、糜子、小米很相似。其分化特点是首先生长锥开始膨大及稍有伸长,然后自基部向上产生乳头状的突起,形成第一级分枝原基。接着自第一级分枝原基上产生第二级分枝原基。在花序中部产生第三级分枝原基,而花序的两端仅产生第二级分枝原基,小穗及花各器官的分化顺序是二个颖片、二个不育外稃、外稃、内稃、雄蕊、雌蕊。2.水稻各个品种之间生长锥分化,从形态特征上来看,区别不大。在前期生长锥大小上略有不同。在花发育的后期品种之间表现出了品种的特征,如小红芒在内外稃合拢时就表现出明显的芒原基。从发育速度上来看。不同品种之间,则有很大的差异,早熟品种生长锥通过各个分化阶段时间比较短,而晚熟品种则较长,这与早熟品种穗小粒少有关系。提早插秧延长前期的营养生长,对促使穗大粒多有好处。3.根据生长锥的分化规律,在生长锥产生分枝阶段前期进行追肥是能够增加分枝的数目。在花各部器官分化阶段进行追施速效性肥料,也能够提高花的发育率。
1. The morphological characteristics of rice growth cone differentiation are similar to those of other plants with panicles such as sorghum, millet and millet. The differentiation is characterized by the first growth of the cone began to expand and a little elongation, and then from the base up papillary protrusions, the formation of the first branch primordia. Then from the primary branch of the second generation of branching primordia. In the middle of the inflorescence produce the third branch primordia, and the ends of the inflorescence produce only the second branch primordia. The order of differentiation of the spikelets and the floral organs is two glumes, two male sterile inflorescences,稃, Nephotetti, stamens, pistils. 2. Rice growth cone differentiation among varieties, from the morphological characteristics point of view, the difference is not. In the early growth cone size slightly different. In the late development of flower development showed the characteristics of varieties, such as the small red mandarin 在 closed when the show on the apparent base of the mandarin. From the development point of view. There are great differences among different cultivars. The growth cones of the early maturing cultivars pass through a relatively short period of differentiation stage, whereas the late maturing ones are longer, which has little to do with the early maturing cultivars. Early seedling to extend the early vegetative growth, to promote large grain more beneficial. 3. According to the differentiation rules of growth cone, it is able to increase the number of branches in the early stage of growth cone generation branching stage. It is also possible to increase the rate of flower development by pursuing fast-acting fertilizer at various stages of organ differentiation in flowers.