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核桃树喜欢温暖、凉爽,不耐湿热。要求年均温10～14℃,绝对最低温度在-25℃以上,年降水量在400～1200毫米之间。固原地区从1958年以来引进新疆核桃,有的已结果。固原县鸦儿沟林场单果重13.7克,一斤大约36个半。固原城阳、隆德奠安等地200多年的大核桃树,单株产量达380～400斤。海原县农业局苹果园内栽植的核桃树,有的枝条几乎年年风干。可见固原山区发展核桃有一定的局限性,需根据各地气候条件,因地制宜地栽植。
Walnut trees like warm, cool, intolerant hot and humid. Requirements of the average annual temperature of 10 ~ 14 ℃, the absolute minimum temperature above -25 ℃, the annual precipitation between 400 ~ 1200 mm. The Guyuan region has introduced Xinjiang walnut since 1958, and some have already achieved results. Guyuan County poplar ditch forest single fruit weight 13.7 grams, about 36 and a half pound. Guyuan Chengyang, Lund laid the ground for more than 200 years of large walnut trees, yield of 380 to 400 kg per plant. Haiyuan County Bureau of Agriculture apple orchard planted walnut trees, and some branches almost every year air-dried. Visible Guiyu mountain walnut development has some limitations, according to the climatic conditions, according to local conditions planted.