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我所从1978年起,在庆阳开展了“苹果乔砧幼树密植丰产栽培试验”。取得第一年建园,第二年见果,第三年平均亩产1068.8斤(最高亩产1278.9斤),第四年在严重霜冻危害下(单花伤亡94.4％)平均亩产1476斤(最高亩产1724.8斤),第五年平均亩产8349.6斤(最高亩产11050斤)的结果。一、试验园概况试验园建在黄土高原上的庆阳县什社公社任岭生产队塬地果园中。距西峰镇20公里。土壤为黄绵土,土层深厚,透气性良好,pH值7—7.3,0—80厘米土层中,有机质含量0,915％,
Since 1978, we have conducted the “Apple Joven ancestral tree planting and planting test.” In the first year, the park was built and in the second year, the average mu yield was 1068.8 kg (the highest mu yield was 1278.9 kg). In the fourth year, the average mu yield was 1,476 kg (94.4%) The highest per mu 1724.8 pounds), the fifth year average yield of 8349.6 kg (the highest yield 11050 pounds) results. First, the experimental park Overview Experimental Park built on the Loess Plateau Qingyang County Shushe commune Renling production team in the orchard. 20 kilometers away from Xifeng town. Soil is loessial soil, deep soil, good air permeability, pH 7-7.3, 0-80 cm soil layer, the organic matter content of 0,915%