米老排(Mytilaria laosensis)属金缕梅科半落叶乔木,是中国南亚热带优良速生用材树种,材质优良,经济效益高。60年代在广西大青山试种成功后,已成为主要的造林树种之一。广西已发展到1300ha,幼林普遍生长良好,但某些林分因密度过大而出现生势衰退现象。如何提高经营水平,合理确定其造林密度,是有待解决的问题。为此,1980年我们做了米老排造林密度试验,取得了初步成效。现将试验结果初报如下。 Mytilaria laosensis is a hamamelidaceae semi-deciduous tree, which is an excellent species of fast-growing timber for the south subtropical China. It is of good quality and high economic benefit. After the success of planting in Daqing Mountain in Guangxi in the 1960s, it has become one of the major afforestation species. Guangxi has developed to 1300ha, young forests generally grow well, but some stands because of the density is too large and the phenomenon of recession. How to improve the management level and determine the afforestation density rationally is a problem to be solved. To this end, in 1980 we made rice veterinary row density test, and achieved initial success. Now test results are as follows.