论文部分内容阅读
1.观察了桃花芽分化的程序,可以分为7个时期。花芽分化开始期的标志是生长点突起,肥大,顶端变平。 2.桃花芽分化的时期,保定地区在7月底,分化期比较集中,持续时间较短。 3.桃树花芽分化因枝条而异,短果枝早于长果枝,但各期延续时间较长。长果枝开始分化晚,但进行较快,自花瓣期以后,两者相近。 4.花芽分化是在结果枝停止生长延长枝生长缓慢后开始分化的,短果枝比长果枝停止生长早,花芽分化亦早。说明花芽分化需要养分积累。 5.花芽分化与果实发育的第三阶段同时,在养分上不无矛盾,故此时追肥、灌水将对花芽分化与果实发育有良好的影响。 6.花芽分化前后,总氮量变化规律不甚明显,而蛋白质态氮占总氮量百分率,在花芽分化前5—10天出现高峰。 7.花芽分化期,糖份含量较高,说明花芽分化除氮的积累外,还需要糖份的积累。 8.花芽分化与植株的养分积累有关,在花芽生长点分化以前,已有了生理上的变化,其时间大约在形态分化前5—10天。
1. Observed peach bud differentiation process, can be divided into seven periods. The sign of the beginning of flower bud differentiation is the growth point protrusion, hypertrophy, the top flattened. 2. Peach bud differentiation period, Baoding area at the end of July, the differentiation period is more concentrated, the duration is shorter. 3. Peach flower bud differentiation due to branches vary, short fruit branches earlier than long branches, but the longer duration. Long branch began to differentiate late, but carried out faster, since the petal phase, the two are similar. 4. Flower bud differentiation is to stop growth in the results of the branches to extend the slow growth of branches began to differentiate, short fruit branches than the growth of fruit branches stop growing early flower bud differentiation is also early. Explain flower bud differentiation needs nutrient accumulation. 5. Flower bud differentiation and the third phase of fruit development at the same time, there is no contradiction in nutrients, so top dressing, irrigation will flower bud differentiation and fruit development have a good effect. Before and after the flower bud differentiation, the change rule of total nitrogen was not obvious, but the percentage of protein nitrogen in the total nitrogen content peaked 5-10 days before flower bud differentiation. 7. Flower bud differentiation period, higher sugar content, indicating that the flower bud differentiation in addition to the accumulation of nitrogen, but also the need for sugar accumulation. 8. Flower bud differentiation and plant nutrient accumulation, before the differentiation of flower bud growth point, there have been physiological changes, the time about 5-10 days before morphological differentiation.