论文部分内容阅读
目的:探讨齿瓣石斛Dendrobium devonianum在龙陵、腾冲、木康、风平4个栽培居群平均节鲜重、平均茎节干重、含水量、平均茎节长等生长量的差异,及其与海拔等环境因素的关系。方法:观测和分析齿瓣石斛4个居群茎的数量性状。结果:龙陵居群的平均茎节鲜重、平均茎节长度、平均茎直径、含水量均高于其他3个居群,木康居群平均茎节干重最大,与其他居群有极显著差异(P=0.000),龙陵居群次之。平均节鲜重与茎直径、茎节长度、含水量、居群有极显著的相关性。平均茎干重与平均茎直径、居群有极显著的正相关性,与节间长度差、含水量有极显著的负相关性,与平均茎节长有显著的负相关性。结论:茎直径的增大对茎鲜重的增加比茎节长度的增加显著,直径越大、节间长度差越小、含水量越少、平均茎节越短的茎条,平均茎干重越大。不同的栽培环境影响齿瓣石斛的产量和质量,含水量与居群有极显著的相关性,海拔高的地区降水多,茎含水量大。木康居群的山谷地形使昼夜温差加剧,有利于干物质的积累,极显著的高于海拔较高的龙陵居群和腾冲居群;热带坝区昼夜温差小,不利于干物质的积累。
OBJECTIVE: To investigate the differences of average fresh weight, average stem weight, water content, average stem length and other growth of Dendrobium devonianum in four cultivated populations of Longling, Tengchong, Mukang, Relationship with environmental factors such as altitude. Methods: The quantitative traits of four populations of Dendrobium candidum were observed and analyzed. Results: The average fresh stem weight, average stem length, average stem diameter and water content of Longling population were higher than those of the other three populations. The average dry weight of stem of Gangmu was the largest, with significant difference with other populations (P = 0.000), followed by Longling population. Average fresh weight and stem diameter, stem length, water content, population has a very significant correlation. The average dry weight of stems had extremely significant positive correlation with average stem diameter and population, negative correlation with the length of internodes and water content, and significant negative correlation with average stem length. Conclusion: The increase of stem diameter of fresh stem increased more than stem length. The larger the diameter, the smaller the length of internode, the smaller the water content, the shorter the average stem, the average stem weight The bigger Different cultivation environments affected the output and quality of Dendrobium candidum, the water content had a very significant correlation with the population, more precipitation in the areas with higher elevation, and larger stem water content. The valley topography of the Mukang group made the temperature difference between day and night aggravate, which is conducive to the accumulation of dry matter, extremely significantly higher than the Longling population and the Tengchong population at higher altitudes. The temperature difference between day and night in the tropical dam area is not conducive to the accumulation of dry matter.