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四川省井研县周坡良种基地,是我省大面积利用荒山、薄土,开山筑梯,新建立起来的柑桔新产区。该基地从1975年开始,建立良种母本园,发展良种,坚持果树上山,垦荒种果,建立起高产示范园和大小不等的新式果园356个,栽植良种柑桔115万株。其中锦橙占总株数90％,其余有温州蜜柑、脐橙、血橙、椪柑,大红袍、红桔等品种。1985年产优质柑桔200多万公斤,外销150吨。预计1986年可产300万公斤左右。今后小树逐年投产,产量将大幅度上升。周坡良种基地已进行了三年的中日柑桔技术交流活动,其中“中日青年友谊果园”就是由日本专家设计的,既是优选单株繁育母本园,又是高产示范园。周坡果园参照日本柑桔管理经验,结合当地实际情况,在科学管理提高柑桔产量和质量方面,进行了一系列改进,摸索到一些生产经验,整理如下:
Sichuan Province Jingyan Zhou Po good seed base, is our province a large area of barren hills, thin soil, mountain ladder, the newly established citrus new producing areas. Since 1975, the base has been established as a seed mother’s garden, developing good varieties, insisting on fruit trees going up the mountain and reclaiming wasteland and planting fruits, establishing a high-yield demonstration garden and 356 new-style orchards with different sizes and planting 1.15 million elite citrus trees. Among them, Jinrui accounted for 90% of the total number of plants, and the rest were Wenzhou mandarin, navel orange, blood orange, citrus fruit, dahongpao, red tangerine and other varieties. 1985 produced more than 200 million kilograms of quality citrus, export 150 tons. It is estimated that about 3 million kilograms will be produced in 1986. Small tree put into operation year by year, output will increase substantially. Zhou Po-liang seed base has conducted three years of Sino-Japanese citrus technology exchange activities, including “Sino-Japanese Youth Orchard” is designed by Japanese experts, both the preferred single parent breeding park, is a high yield demonstration park. Based on the experience of citrus management in Japan and the actual conditions in the area, Zhoupo Orchard conducted a series of improvements in terms of scientific management to improve the output and quality of citrus. Some production experiences were explored and summarized as follows: