摘要
分析粤北地区1952—2014年气象变化特征和2004—2013年后季稻生产资料。结果表明:近63年粤北地区寒露风总日数为826 d,平均每年13.8 d,每年呈0.1 d的减少趋势;平均初日出现在10月1日,大致呈现每年0.09 d的推迟趋势;寒露风过程总次数为123次,平均每年出现2.1次,其中,中、重度寒露风累计出现64次,占总次数的52%。2004—2013年粤北地区平均出现寒露风天数为11.4 d,后季稻平均穗粒数为107粒,空壳率为16.6%,秕谷率为13.7%,平均产量为6 369.5 kg·hm^(-2)。寒露风出现天数与后季稻穗粒数、产量表现为负相关,与空壳率、秕谷率表现为正相关,其中,空穗粒数、空壳率和产量通过率显著性达0.01。
According to analysis of climate change characteristics from 1952 to 2014 and data about second rice crop from 2004 to 2013 in the north Guangdong, a total of 826 days were in the cold dew wind in the past 63 years, 13.8 days per year on average, tending to decrease 0.1 day annually, in the north Guangdong. The cold dew wind initiated itself on October 1 roughly every year, showing a trend of 0.09 day delayed annually. In a total of 123 cold dew winds, 2.1 per year on average, 64 remarkable cold dew winds occurred, accounting for 52% of the total. From 2004 to 2013, there were 11.4 days in cold dew wind a year on average, and average number of grains per ear was 107 in second rice crop, rate of shell accounted for 16.6%, abortive grain rate was 13.7%, and the average yield was 6 369.5kg · hm^- 2 in the north Guangdong. Days of cold dew wind performed negative correlation to grain number per spike and yield, and positive correlation to rate of shell and abortive grain rate, among them the significance of empty spike grain number, shell rate and yield reached 0.01.
出处
《亚热带农业研究》
2016年第3期199-204,共6页
Subtropical Agriculture Research
关键词
粵北
后季稻
寒露风
日数
产量因素
northern Guangdong
second rice
cold dew wind
days
yield factors
