甘肃省核桃气候适宜性分区评价与种植区划

Adaptability assessment of regional climatic condition for Juglans regia in Gansu Province and planting division

基于甘肃省核桃主产区气候条件的主成分分析,制定了核桃气候适宜性分区评价指标体系及评分标准,对75个县(市)进行核桃气候适宜性评分和分区,初步制定了相应的种植区划.结果表明:年均温、1月份均温、7月份均温、≥10℃的积温、日照时数和年降水量是影响核桃生长发育的主要气候因子.甘肃省核桃产地可划分为气候适宜区和气候次适宜区.结合核桃的气候适宜性及生产现状,将全部产地划分为7个种植区:陇东南部黄土高原丘陵种植区、陇南天水北秦岭山地种植区、陇东北部黄土高原丘陵种植区、陇南南秦岭山地种植区、平凉天水黄土高原丘陵种植区、陇中黄土高原丘陵种植区、河西走廊绿洲种植区.

Based on the principal components analysis on climatic condition affecting on the growth and development of Juglans regia, one of economic forest species, of main production areas in Gansu Province, an assessment index system and corresponding scoring criteria relevent to the climatic adapability of Juglans regia were designed and established, and then the respective climatic conditions of 75 counties were scored and the province was divided into different climatic districts according to the total scores of climatic conditions of these counties adapting for Juglans regia. Finaly,a tentative planting division of Juglans regia in Gansu Province was worked out. The results showed that six factors including the annual mean temperature,average temperature in January and July, accumulated temperature obove 10℃, sunshine hours and annual precipitation were judged as the primary climatic factors affecting on the growth and development of Juglans regia. The producing areas of Juglans regia in the province could be classified into two climatic districts respectively, i. e. optimum climatic condition district and ordinary climatic condition district. According to the adaptablity to regional climatic condition and present cultivation situation of the tree species,the whole producing areas in Gansu could be further subdivided into seven planting regions.the loess hilly planting region of southern Longdong, the northern Qinling mountains planting region of Longnan and Tianshui,the loess hilly planting region of northern Longdong,the southern Qinling mountains planting region of Longnan,the loess hilly planting region of Pingliang and Tianshui, the loess hilly planting region of Longzhong,the Hexi Corridor Oasis planting region.