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核桃是我省的重要经济树种,传统的大宗出口商品,总产的一半销往国外,对换取外汇,支援“四化”建设有着重要的意义。但是由于长期沿用种子繁殖和粗放经营,产量低而不稳,平均株产不足2.5公斤,坚果质量参差不齐,出仁率低,因而削弱了在国际市场上的竞争能力,价格比美国核桃低三分之一。开展核桃优树选择,采用优良无性系造林,是提高陔桃产量和品质的最有效的途径,是实现良种化栽培的根本措施。核桃在
Walnut is an important economic tree species in our province, the traditional bulk export commodities, half of the total output sold abroad, in exchange for foreign exchange, support the “four modernizations” has an important significance. However, due to prolonged use of seed breeding and extensive management, the yield is low and unstable, with an average yield of less than 2.5 kg. The uneven quality of nuts and the low kernel yield have weakened the competitiveness in the international market and the price is lower than that of U.S. walnut one third. It is the most effective way to improve the yield and quality of Potamogeton crispus by carrying out the selection of excellent walnut trees and afforestation with excellent clones and is the fundamental measure to realize the cultivation of good varieties. Walnut in