摘要
为了定量分析北京山区农业气候资源,利用山区1 km2小网格的气候资料,应用农业气候适宜度理论、模糊数学和因子分析等方法,通过5项农业气候指标与山区栽培植物生长发育条件之间隶属函数的建立及其权重的确定,分别计算山区各网格点的农业气候资源指数、效能指数和利用系数,并在GIS的支持下建立了它们的栅格图。结果表明:北京山区以平谷、密云、怀柔南部等东北部地区的农业气候资源系统较为优良,无论是气候资源总量还是其匹配状况以及利用率都是本地区最高的;与之相反,西北部和海拔较高的山区,不仅农业气候资源总量贫乏,而且光、热、水资源的匹配程度较差,导致农作物对资源的利用率较低;此外,房山东南部和昌平南部等地区气候资源总量较为丰富,但受水资源的限制,光、热、水资源的匹配程度较差,致使当地气候资源利用率较低。
In the interest of evaluating the agroclimatic resources system of Beijing mountain area, argoclimatic indexes including resource index （Cr）, efficiency index （Ce） and utilization coefficient （K） of 1 km^2 grid were calculated. Before the agroclimatic indexes calculated, two works had been done. First, the fuzzy subordinativedegree functions were established between five agroclimatic factors and the conditions of the plant developing by using the climatic data of 1 km^2 grid of the Beijing mountain area; Second, weights of the five factors were determined through factor analysis method. Supported by Geographic Information System （GIS）, the results of the argoclimatic indexes were finally transferred to visual grid images. Using the grid images can conveniently and quickly evaluate the agroclimatic resource of each grid. There are some results by analyzing the grid images of agroclimatic indexes. The agroclimatic system is best in the northeast of the Beijing mountain area including the county of Pinggu , Miyun and the south of Huairou, where not only possessed the richest agroclimatic resources but also the best matching of sunlight, heat and precipitation, so the plant had the highest level utilization of agroclimatic resource; In reverse, the northwest and the higher altitude mountain area had neither abundant agroclimatic resources nor the good matching of sunlight, heat and precipitation, so the plant had lower level utilization of agroclimatic resources; In addition, although abundant argroclimatic resources in southeast of Fangshan county and south of Changping county , restrained by water resources , so the matching degree of sunlight, heat and precipitation is worse and the utilizing agroclimatic resources is lower.
出处
《山地学报》
CSCD
北大核心
2005年第4期507-512,共6页
Mountain Research
基金
北京市自然科学基金重点项目(6031001)。~~
关键词
农业气候适宜度
GIS
小网格
模糊综合评判
山区
argoclirnatic suitability
Geographic information system （GIS）
grid
fuzzy comprehensive evaluation
mountain area
