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千年桐是重要的油料树种之一。生长快,寿命长,适应性强,耐炎热气候。我区桂南各地广泛的栽培着。但是用种子繁殖的实生桐林,一般的有50%以上的植株是雄性占优势的雌雄树,甚至有的竟高达70%,这些雌雄树在它的整个生命过程中结果是极少的,因此大家都习惯称这样的树为雄树。就是结果的雌树,也由于花粉自然杂交和用种子繁殖的原因,影响了单位面积产量。据调查大面积的实生桐林,一般平均亩产桐籽在30斤左右。但是其中有些丰产单株(优树)桐籽产量则相当高,有的7
Millet Tong is one of the important oil tree species. Fast growth, long life, adaptability, resistance to hot weather. My area is widely cultivated throughout Guangxi. However, seedlings are grown in Tonglin, generally more than 50% of the plants are dominated male and female trees, and some even as high as 70% of the male and female trees in its entire life process results are very few, so everyone It is customary to call such a tree a male tree. It is the result of the female tree, but also due to natural pollen and seed propagation reasons, affecting the yield per unit area. According to the survey of large-scale real Tonglin, the average yield of Tong seeds in about 30 pounds. However, some of the high-yielding single trees (elm trees) have a very high yield of black-seeded seed, some 7