专业市场调查发现,我国核桃年产量10～15万吨。人均占有量约0.12千克,市场销售量约占总产量的50%左右,实际人均消费量为0.05～0.06千克,是美国人均消费量0.65千克的1/11～1/13。创造条件提高我国核桃国际市场上的竞争能力,年外销量可增加到5万吨。即使我国核桃产量达到35万吨,也不能满足市场需求。因此,核桃的生产具有广阔的发展前景。核桃是喜温树种,正常生长发育要求年均气温9～16℃,绝对最低-2～-25℃,绝对最高38℃。如遇持续干旱,则常发生日灼现象;无霜期150～240天。核桃树对空气干湿度适应性较强,能忍耐较干燥空气,但对土壤干湿度十分敏感,过干、过湿均不利于生长。核桃树要求年降水500～200毫米,如果分布均匀,年降水量500～700毫米也完全可以满足其正常生长发育需要。核桃树又是喜光的 Professional market survey found that China’s annual output of walnut 10 to 150,000 tons. The per capita amount is about 0.12 kilograms, and the market sales amount to about 50% of the total output. The actual per capita consumption is 0.05 to 0.06 kilograms, which is 1/11 to 1/13 of the per capita consumption of 0.65 kilograms in the United States. Create conditions to improve China’s competitiveness in the international market of walnuts, annual sales can be increased to 50000 tons. Even if our country’s walnut output reaches 350,000 tons, it can not meet the market demand. Therefore, the production of walnut has broad prospects for development. Walnut is a hi-temperature tree species, the normal growth and development requirements of the average annual temperature of 9 ~ 16 ℃, the absolute minimum -2 ~ -25 ℃, the absolute maximum 38 ℃. In case of persistent drought, the sunburn often occurs phenomenon; frost-free period of 150 to 240 days. Walnut trees are more adaptable to air humidity and humidity, able to endure the more dry air, but very sensitive to soil moisture, over-dry, over-wet are not conducive to growth. Walnut trees require annual precipitation 500 ~ 200 mm, if evenly distributed, the annual rainfall of 500 ~ 700 mm also fully meet their normal growth and development needs. Walnut tree is hi light