摘要
对φ(N)32°14′~32°56′,λ(E)104°36′~104°51′范围内海拔(halt)400 ~1 400 m 豆地小气候观测结果表明:halt每升高100 m ,平均气温递减0.72 ℃;年降雨量递增63.0 mm(400~600 m) ~106.8 mm(800 ~1 400 m);相对湿度递增1% ;日照时数呈抛物线上升变化. halt400 m 日均温稳定通过12.0 ℃的初期为3 月中旬,halt每升高100 m ,该时间延迟5~7 d. 不同halt>12℃的有效积温分别为3621.2 ℃(400 m);3 245 .0 ℃(600 m);3 149.9 ℃(800 m) ;2 804 .8 ℃(1 000 m) ;2082.1 ℃(1200 m);1 950.1 ℃(1 400 m) . 在相对较高的海拔,存在明显的逆温和南北坡效应,相应存在大豆局部高产区. 不同海拔豆地生态及大豆生长发育变化研究结果可为四川不同海拔区大豆品种合理布局和应用高产优质栽培技术提供了理论依据.
The ecological circumstances of soybean fields are greatly varied at different altitudes. The microclimate for soybean fields between 400~1 400 m above sea level was observed as follows in φ (N)32°14′~32°56′, λ (E)104°36′~104°51′: As altitude rises per 100 m,mean air femperature decreases by 0.72 ℃,relative humidity increases progressively by 1%,and annual precipitation increases by 63.0 mm (between 400~600 m) and 106.8 mm (800~1400 m), respectively. Sunny hours tend to be changed in parabola. The middle March is the initial period in which daily mean air temperature rises steadly over 12 ℃ at 400 m and the period is delayed for about 5~10 d as the altitude rises per 100 m. Effective accumulated temperature in the fields above 12 ℃ at different altitudes was 3 621.2 ℃(400 m),3 245.0 ℃(600 m),3 149.9 ℃(800 m), 2 804.8 ℃(1 000 m),2 082.1 ℃(1 200 m) and 1 950.1℃(1 400 m),respectively. Owing to the apparent effects of inversion and south north facing slopes,soybean fields with high yield are found in some regions. This study provides the scientific basis for the layout and cultivation of soybean in various regions at different altitudes in Sichuan.
出处
《应用与环境生物学报》
CAS
CSCD
1999年第6期557-560,共4页
Chinese Journal of Applied and Environmental Biology
基金
国家攀登计划子项目!92191