关键词: 两栖动物, 两栖动物, 保护, 群体遗传, 亲缘地理学, 适应性变异

Abstract:

In order to study meteorological factors on cotton yield and its composition factors in Nantong, the author used the information of regional cotton variety test in Nantong in 2009, analyzed cotton yield and component factors associated with meteorological factors in the three pilot. The results showed that: it had significant correlation between the average temperature in the growth period and seed cotton yield, boll weight. In the whole growth period of cotton, with the higher the temperature and the higher the yield of cotton in the appropriate temperature range, it was one of the important factors about appropriate water in the cotton growth. It had adverse affects in the cotton growth if the precipitation would be too much or too little. There was a significant negative correlation between the precipitation in boll stage and lint yield. More rainfall during the blooming period, the lower the yield of cotton, it was because too much rain falling result to increase take off the cotton, and decrease in the number of bolls. It had significant positive correlation between sunshine hours and cotton lint yield, boll weight. In the blooming period, it had significant positive correlation between sunshine hours and lint yield. In short, weather conditions in Nantong correlated with cotton production, and light was affecting the key factor in cotton production.