摘要
为了解异常温度变化过程对农业生产的危害,采用作物与气象要素平行观测分析法初步分析了近10a江汉平原盛夏低温过程对处于穗始分化期至灌浆期的中稻结实的影响。结果表明,若期间日平均气温24h降幅达5℃以上,或多日连续降幅达7℃以上,其空秕率可达15%或以上,而且有降幅越大空秕率越高的趋势。
In order to know well the hazard of abnormal temperature change to agriculture impact of low-temperature process in midsummer on seeding of mid-season rice from spike differentiation to grouting in Jianghan Plain in recent 10 years, parallel observation was used to analyze crop and meteorological factors in this study. The results showed that percentage of sterile grain could reach 15% or even over 15 % when daily average temperature reduced by more than 5 ℃ within 24 hours, or temperature continually descended by over 7 ℃ in several days. Furthermore, there existed one tendency that percentage of sterile grain positively increased with the extent of temperature reduction. In the end, the hazard mechanism of low-temperature process in midsummer to seeding of mid-season rice and how the results guided agriculture had been discussed.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
2008年第5期676-679,共4页
Journal of Huazhong Agricultural University
基金
国家科技支撑计划项目(2006BAD04B04)
2006年武汉区域科技发展基金资助
关键词
江汉平原
盛夏
低温过程
中稻
结实
Jianghan Plain
midsummer
low-temperature process
mid-season rice
seeding
