提出了以定期结实年数和定期结实枝平均生长量为标准的优树选择方法。
The great bearing interval was regarded as optimum time, and optimum method for plus tree selection was put forward by the analytical results.
利用3 ~ 4年单枝结果数和单株产果量的平均值作为高产胶优良无性系早期选择的标准。
The average yield of every 3 ~ 4 a from a single twig and from an individual could also be employed as an index for early stage selection of new clones.
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