天水地区农业生态气候资源量化与评价

The assessment and quantization of agricultural ecoclimate resources in Tianshui

根据天水地区7个气象台站多年平均气候资料和23个点的订正资料,采用农业生态气候适宜度的动态模型,对天水地区农业生态气候资源进行了量化分析和分类评价。农业生态气候的资源指数、效能指数和利用系数计算结果表明:自南向北、从东到西资源指数Cr、效能指数Ce和利用系数K大致呈递减态势,其中资源指数Cr的最高值出现在天水南部的党川附近,Cr值为6.5,最低值出现在榆盘附近,Cr值为4.4;效能指数Ce的最高值出现在麦积区附近,Ce值为3.8,最低值出现在王铺、沿安等山区,Ce值为1.6;利用系数K的最高值也出现在麦积区附近,K值为0.7,最低值也出现在王铺、沿安等山区,K值为0.3。这一变化基本反映了农业生态气候的地域分异特征。通过对多年逐月平均效能指数的模糊动态聚类,划分出天水农业生态气候资源的5个类型区,并进行了相应评价,结果表明天水农业生态气候的资源潜力、匹配状况和利用程度具有明显的区域分布特征,进而在此基础上提出了开发利用农业生态气候资源的若干建议。

Based on data of real measurement in 7 whether stations and reduced data in 23 spots between 1965 and 2005 in Tianshui, the agricultural ecoclimate resources were quantitatively assessed and analyzed with the method of dynamic state model of agricultural ecoclimate proper degree. The index of agricultural ecoclimate resources, index of effectiveness and coefficient of utilization were calculated. The result indicated that basically from south to north, from east to west the resources index Cr, effectiveness index Ce and coefficient of utilization K assume a degression trend approximately, in which the maximum of resources index Cr, with a value of 6.5, appears nearby Tianshui＇s Dangchuan, its minimum value 4.4 appears nearby Yupan. While the maximum of potency index Ce, with a value of 3.8, appears nearby Maiji, its minimum value 1.6 appears in the mountainous areas of Wangpu and Yanan. The maximum of coefficient of utilization K, with a value of 0.7, also appears nearby Maiji, its minimum value 0.3 appears in the mountainous areas of Wangpu and Yanan. The changes have basically reflected the characteristics of regional distribution of agricultural ecoclimate. Then by clustering the coefficient of utilization of each month, 5 types of agricultural ecoclimate areas in Tianshui were given. The results showed that the potential of agricultural ecoclimate resources, the condition of match and degree of utilization had big difference in the area. Finally suggestions for making better use of agricultural ecoclimate resources were put forward.