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近年来,在杂交水稻种子生产上存在着一个突出的问题,就是在收获季节母株穗大量发芽(穗发芽),发芽率在正常年份为5%左右,特殊年份(如成熟期间遇到阴雨天气)可超过20%。穗发芽后的种子,重则失去利用价值,造成经济损失;轻则降低种子活力,也影响种子的耐藏性;还增加了浸种催芽难度。为了解决这一问题,我们应用生长延缓剂多效唑进行了抑制杂交水稻种子穗发芽的研究。材料和方法一、多效唑处理试验在V_(35)大田进行。在抽穗10%时(1987年7月8日)用每亩10克九二○对V_(35)喷施一次,喷后10天用不同方式和不同浓度的多效唑(EMT)
In recent years, there is a prominent problem in the hybrid rice seed production, that is, during the harvesting season, the sprouting of a large number of plant spikes (sprouting) occurs at a germination rate of about 5% in normal years. In particular years (such as rainy weather during maturity ) Can exceed 20%. Seeds after sprouting, but lost the value of heavy use, resulting in economic losses; ranging from reduced seed vitality, but also affect the seed storage resistance; also increased the difficulty soaking germination. In order to solve this problem, we applied the growth retardator paclobutrazol to study the spike germination of hybrid rice seeds. Materials and methods A, paclobutrazol treatment experiments in V_ (35) field. At 10% heading (July 8, 1987), 10 grams of 990 pairs of V_ (35) were sprayed once and 10 days after spraying with different concentrations and different concentrations of paclobutrazol (EMT)