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研究证明:1.穗粒数是随15—20℃的积温量,日辐射量的增加而增多.证明了同一品种在高原种植后表现穗粒数多的主要原因是,药隔形成期到开花期的持续时间比内地为长,这样孢原组织能得到充分的分化,而进入四分子期。加之高原特殊气候因素的相互配合,减少了退化小花数,而增加了穗粒数。 2.千粒重主要受日照时数、日较差、降雨量所影响。进一步证明,高原千粒重高的主要原因是,由于开花到成熟期日照时数多。进一步否定了许多研究者用推理的方法,认为高原气温日较差大是籽粒重、产量高的结论. 3.不孕小穗率是受多种气候因素相互制约。改善和创造良好的光照条件,调节农田小气候(湿度)对减少不孕小穗率有一定的作用。分析进一步证明,一日中温度升降变化大是不利于小麦的开花授精。
The results showed that: 1. The number of grains per spike increased with the increment of accumulated temperature from 15 ℃ to 20 ℃ .It is proved that the main reason that the same variety has more grains per spike after planting in the plateau is that the interval between blossom and blossom The duration of the period longer than the mainland, so that the spore tissue can be fully differentiated into the four-molecule period. In addition, the cooperation of the special climatic factors in the plateau reduces the number of floret degeneration and increases the number of grains per spike. 2. 1000-grain weight mainly due to sunshine hours, the day is poor, the impact of rainfall. Further evidence that the main reason for the high altitude 1000 grain is due to the number of hours of sunshine from flowering to maturity. Further negation of many researchers using reasoning method, that the plateau day temperature difference is the grain weight, high yield conclusion.3.The rate of infertility spike is restricted by a variety of climate factors. Improving and creating good lighting conditions, and regulating cropland microclimate (humidity) have a certain effect on reducing the rate of infertility spikelets. The analysis further proves that large changes in temperature during the day are not conducive to the flowering and fertilization of wheat.