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前言丹东栗是辽宁省栗产区的主栽种。全省有栗树1500万株,其中丹东栗1300万株,占86％以上。丹东栗长期沿用实生繁殖,自然杂交变异性大,后(子)代单株之间产量高低悬殊,没有形成稳定的园艺品种。据调查宽甸县单株最高产量达198斤,而相同立地条件下的同龄树产量仅几斤。宽甸县城厢大队果园313株丹东栗树中,按树冠投影面积计算产量,高的达0.77斤/m~2,平均只有0.18斤/m~2。全省约有40％以上的丹东栗树不结果或
Introduction Dandong chestnut is the main planting area of Liaoning Province. The province has 15 million chestnut trees, of which 13 million Dandong chestnut, accounting for more than 86%. Dandong chestnut with long-term use of real breeding, natural hybrid variability, after the (sub) generation of high yield between the single plant, did not form a stable horticultural varieties. According to a survey Kuandian County, the highest yield of 198 kg per plant, while the same site conditions under the same age tree yield is only a few pounds. Among the 313 Dandong chestnut trees in the orchard of Chengde Brigade in Kuandian County, the yield was calculated according to the projected area of the canopy, with a high of 0.77 kg / m ~ 2 and an average of only 0.18 kg / m ~ 2. About 40% of the province’s Dandong chestnut tree results or not