我国已加入WTO,农业结构调整势在必行。李树是在寒地早果早丰、好栽易管的树种,其果实由于耐贮运性的制约而抗南方品种冲击,因此在我省大部分地区其栽培效益高出其它树种,是一般大田作物的5倍。2001年果树大冻害年份,使很多不抗寒品种冻死或冻伤,在未来栽培中将退出大部分栽培市 China has joined the WTO, agricultural restructuring is imperative. Li Shu is an early morning harvest in the cold, good planting easy to plant species, because of its resistance to storage and transportation of the South varieties of anti-impact, so in most parts of our province, its cultivation efficiency is higher than other species, is generally Field crops 5 times. In 2001 the year of fruit tree frostbite, so that many non-frostbite varieties of frozen or frostbite, in the future cultivation of most of the cultivated city