北碚农业气候区划探析(英文)

Analysis of Division of Beibei Agro-climatic Zones

[目的]分析并探讨重庆市北碚地区的农业气候区划。[方法]根据北碚地区一年三熟之主要农作物小麦(春性小麦、半冬性小麦)、水稻(中熟早稻、迟熟早稻、迟熟晚稻、一季中稻)、油菜所需热量和不同耕作方式及品种搭配的耕作区,利用统计分析方法,得到不同耕作方式及品种搭配的耕作区所需积温;根据北碚地区近30年各地年平均温度和年积温资料,结合各区域地形、海拔高度、降水量和土壤性质等因素,利用统计归类分析方法,对北碚地区进行农业气候区划。[结果]不同耕作方式及品种搭配的4类耕作区所需积温分别为:第1类耕作区年积温≥6530℃,第2类耕作区6530℃>年积温≥6350℃,第3类耕作区6530℃>年积温≥5990℃积温,第4类耕作区年积温≤5990℃;将北碚地区划分为浅丘平坝温热区、高丘温热区、单斜低山与岩溶槽谷温和区、低山岭脊温凉区4类农业气候区。[结论]利用4类农业气候区主要气候特征和4类耕作区所需积温,对北碚地区进行农业气候区划,可为合理安排作物种类、品种等提供指导,同时对稳定农业生产、提高农作物产量和品质以及增加农民收入具有重要指导与现实意义。

[Objective] The aim was to analyze and explore division of agro-climatic zones of Beibei District in Chongqing municipality. [Method] According to major triple-cropping crops in Beibei District, such as wheat （spring and winter）, rice （midmaturation early season rice, later-maturation early rice, later-maturation late rice and middle-season rice）, heat demanded by rapeseed, different cultivation methods and cultivation regions with different crop varieties, the accumulated temperatures in four cultivation regions featured by special cultivation methods and variety-matching are concluded. Based on average and accumulated temperatures in different locations in 30 y and other factors, such as terrain, elevation, rainfall and soil property, Beibei District can be classified into four agro-climatic zones. [Result] Four cultivation regions are as follows： the 1st cultivation region where accumulated temperature in T y is ≥6 530 ℃, the 2nd cultivation region where 6 530 ℃ accumulated temperature in T y≥6 350 ℃, the 3rd cultivation region where 6 530 ℃ accumulated temperature in T y≥5 990 ℃, and the 4th cultivation region where accumulated temperature in T y is ≤5 990 ℃. Beibei District can be classified into four agro-climatic zones, involving lower hill temperate zone, higher hill temperate zone, single-slope lower hills and karst temperate zone, and lower ridge cool zone. [Conclusion] Based on characters of four agro-climatic zones and accumulated temperatures required in four cultivation regions, agro-climatic zones can be classified in Beibei District, providing references for rational arrangement of crops and is of significance for stabilization of agricultural production, improvement of crops and increase of farmers’ income.