| 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. |