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文冠果为我国北方重要的木本油料树种。解放以前绝大多数为野生状态,自然繁衍。六十年代开始,内蒙古、辽宁等省区相继有大面积的人工栽培。自七十年代起,这些省区已开展了人工选优工作,取得了一定的成效。我省文冠果的野生资源很多,主要分布在黄土高原的次生林地区。大面积人工栽培较晚,树龄较小(一般均为3～5年)。能否进行文冠果的早期选优,即在幼龄人工林内进行选优,我们做了一些探讨,现将具体做法及认识介绍如下:一、选优地点的自然条件及文冠果生长
Wen Guan fruit is an important woody oil species in northern China. Before the liberation of the vast majority of wild, natural reproduction. Beginning in the 1960s, Inner Mongolia and Liaoning provinces and autonomous regions successively had large-scale artificial cultivation. Since the 1970s, these provinces and autonomous regions have carried out artificial selection and have achieved some success. Wen Guan fruit in our province a lot of wild resources, mainly in the secondary forest area of the Loess Plateau. Large-scale artificial cultivation later, smaller ages (usually 3 to 5 years). We can carry out the early selection of the text of the crown of fruit, that is, in the young plantation for optimal selection, we did some discussion, the specific practices and understanding are as follows: First, the natural conditions of selected sites and the growth of Wen Guan