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表现型是遗传基因与环境条件共同作用的结果,即表型(P)=遗传基因(G)+环境条件(E)。在人工林分中以数量指标作为主要指标进行个体选择时,由于这一性状易受环境条件的影响,注意选择条件的一致性,对选择效果有极大的关系。就一片同龄杉木人工林选优而言,所谓选择条件的一致性,主要是指选优工作面内立地条件以及互比木间占有营养空间
Phenotype is the result of a combination of genetic and environmental conditions, phenotype (P) = genetic (G) + environmental conditions (E). In the artificial forest in the number of indicators as the main indicators of individual choice, because of this trait susceptible to environmental conditions, pay attention to the consistency of selection conditions, the choice of effect has a great relationship. In terms of selecting the best Chinese fir plantation at the same age, the consistency of the so-called selection conditions mainly refers to the conditions of the inland selection of the optimal working face and the nutritional space occupied by each other