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据《中国农学通报》2014年第7期《优质高产苹果园结构参数及生理指标研究》(作者薛晓敏等)报道,为了研究优质高产苹果树的环境参数和生理指标,以幼龄和成龄2个果园为研究对象,采用田间系统调查和室内测定分析的方法对优质高产苹果园树体结构参数、群体结构参数及一些生理指标进行了研究。结果表明,优质高产园树高在260~290 cm之间,主枝角度70°~75°;果园覆盖率75%~94%,行间和株间的交接率较小;成龄高产
According to “China Agronomy Bulletin” 2014 seventh period “high quality and high yield apple orchard structural parameters and physiological indicators research” (by Xue Xiaomin, etc.) reported that in order to study the environmental parameters and physiological indicators of high quality and high yield apple trees, young and mature 2 The orchards as the research object, using the method of field survey and indoor analysis to study the tree structure parameters, population structure parameters and some physiological indexes of high quality and high yield apple orchard. The results showed that the tree height of the high-quality and high-yielding garden was between 260 and 290 cm, the main branch angle was between 70 and 75 degrees, the orchard coverage was 75% and 94%