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苹果树开张角度方法评说刘向东，白建栋，段良骅（山西农业大学·太谷·０３０８０１）苹果树要想提早结果、丰产优质，开张角度很重要，因此大家创造了许多开张角度的方法。实践证明大多数方法效果很好，但有的并不理想，有的待改进，现评说如下。一、支撑：用木棍、竹竿...
Apple tree opening angle method comments Liu Xiangdong, Bai Jiadong, Duan Lianghua (Shanxi Agricultural University · Taigu 030801) Apple trees in order to early results, high yield and quality, opening angle is very important, so we have created many ways to open the door. Practice has proved that most of the methods work well, but some are not ideal, and some are still to be improved. First, support: with sticks, bamboo ...