Based on daily temperature data,historical disaster data,and cotton growth period data in Aksu from 1991 to 2023.Linear trend analysis and M-K test methods are used to analyze the characteristics of changes in final frost and low temperature,as well as their impact on cotton seeding and emerging.The results show that the cotton area in Aksu has the lowest risk of frost damage,while the southern Alar and eastern Kuche in the desert have the highest risk;The probability of frost damage in April is the lowest in the central Aksu,the highest in the desert in the south,and higher in the eastern than in the southern Awati;The final frost period undergoes a sudden change in the 21st century,with a significant advance,but it occasionally occurs in years when the final frost is later,posing a threat to the safe emergence of cotton seedlings;Low temperature shows a slow decreasing trend,but its frequency increased in the 2020s;Extreme climate disasters during the cotton seedling stage result in late frost and often accompanied by cold waves and sustained low temperatures.Composite disasters have a significant impact,wide range,and heavy damage on cotton.
关键词
终霜/低温冷害/棉花/播种出苗期
Key words
final frost/low temperature/cotton/seeding and emerging period
维普
万方数据