论文部分内容阅读
一、山西的自然条件山西省位于华北黄土高原。处于东经110°14′—114°33′,北纬34°34′—40°43′之间。全省海拔245—3058米。地形起伏较大,多山岭及沟谷,山区约占全省总面积的2/3。地形和气侯条件复杂,形成许多小地形和小气候。全年平均气温4—14℃,1月份平均气温-2—-16℃,极端最低温度-14—-40℃;7月份平均气温19.5—27.5℃,极端最高温度36—42℃,气温日较差9—16℃。日平均气温≥10℃的积温约1200—4500℃。年降水量400—600毫米。全年日照2200—3000小时。大部分山区光、热资源丰富,雨量充足。果树资源相当丰富。二、山西的板栗资源及其分布板栗(Castanea mollissima Blume)为壳斗科栗属植物,是极有经济价值的木本粮食。过去,人们一直认为山西没有板栗,
First, the natural conditions of Shanxi Province, Shanxi Province is located in the Loess Plateau. It lies between 110 ° 14’-114 ° 33’E and 34 ° 34’-40 ° 43’N. The province’s elevation of 245-3058 meters. Large undulating terrain, mountainous and valleys, mountainous area accounts for about two-thirds of the total area of the province. Terrain and climatic conditions are complex, forming many small terrain and microclimate. The annual average temperature of 4 - 14 ℃, the average January temperature of -2-16 ℃, the extreme minimum temperature of - 14 - - 40 ℃; July average temperature of 19.5-27.5 ℃, the extreme maximum temperature of 36-42 ℃, the temperature day Poor 9-16 ℃. The daily average temperature ≥10 ℃ accumulated temperature of about 1200-4500 ℃. Annual precipitation 400-600 mm. The annual sunshine 2200-3000 hours. Most mountain light, abundant heat resources, adequate rainfall. Fruit tree is rich in resources. Second, the resources and distribution of chestnut in Shanxi Castanea mollissima Blume chestnut chestnut genus, is a very economic value of woody food. In the past, people always think that there is no chestnut in Shanxi,