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文冠果是我国北方优良的木本油料树种之一,具有结果早、含油率高、油质好、收益年限长等优良特性,对干旱、寒冷也有很强的适应能力。但是,文冠果长期以来处于野生状态,人工栽植时间短,异花受粉,单株个体间的生长、结果、产量和品质差别很大,加之栽植立地条件差和放任生长等原因,使单位面积产量受到很大影响。为了探索文冠果优良单株选择的可能性及其增产潜力,我们于1977年开始连续四年对10年生树龄,面积1.4亩的143株文冠果幼林结果情况,进行了逐株调查记载。调查结果表明,树龄、立地条件、管理措施相同,而单株个体间的结果情况表现为以下
Wen-huang fruit is one of the fine woody oilseeds in northern China. It has the characteristics of early fruiting, high oil content, good oil quality, long yield period and strong adaptability to drought and cold. However, for a long time, it has been in a wild state for a long time and has a short manual planting time and different flowers and powder. The growth, the result, the yield and the quality of the individual plant are very different. In addition to the poor planting site conditions and letting growth, Yield is greatly affected. In order to explore the possibility of selecting the best individual plantlets and their potentials for yield increase, we conducted a case-by-case investigation on the results of 143 young plantations with the annual yield of 1.4 years at the age of 10 years. The survey results show that the tree age, site conditions, management practices are the same, and the result of individual plant performance as follows