【摘要】 在黑龙江省哈尔滨市松北区设置3个10 m×10 m的样方,选取长势相近、健康的薰衣草(Lavandula angustifolia Mill.)30株;于生长初期(6月上旬)、旺盛期(8月中旬)、生长末期(11月下旬),每株随机选取10个当年生枝条,测量每个枝条的叶片数量、总叶面积、枝条和叶片质量,计算枝条和叶片功能性状;分早晨、中午、傍晚3个时段,在样方区域按5点法监测环境因子。依据试验统计监测数据,应用方差分析法、显著性差异法、相关性分析法、冗余分析法等,分析薰衣草枝叶功能性状在生长初期、旺盛期、生长末期期间的差异显著性、功能性状变异性、枝叶性状间相关性及其与环境因子的关系,探索薰衣草在哈尔滨地区的生长规律及其对环境因子的适应性。结果表明:薰衣草枝叶生长,在不同生长阶段具有显著差异;枝条含水量、比叶面积、总叶面积、单叶面积、叶生物量、叶含水量,在生长旺盛期显著升高并达到最大值,有利于有机物积累和运输,植物生长旺盛。比叶质量、叶干物质量,在生长末期时显著升高,利于植株为越冬提供养分。薰衣草枝叶功能性状相关性,在生长初期和旺盛期较为密切,体现出枝叶的协同生长,有利于植株形态构建。总体看,叶片生长变异性大于枝条的变异性;生长旺盛期的枝叶变异性为弱变异,植株生长稳定;生长末期的枝叶变异性为中等变异,与植物应对低温调节生理代谢有关。不同生长阶段,各环境因子对薰衣草生长影响的主导作用不同,气温是薰衣草生长初期生长的主要影响因素、土壤电导率是薰衣草生长旺盛期生长的主要影响因素、土壤绝对含水量是薰衣草生长末期生长的主要影响因素。更多还原

【Abstract】 Thirty plants of Lavandula angustifolia Mill. with similar growth and health were selected in three sample plots(10 m×10 m) in Songbei District, Harbin, Heilongjiang Province. Ten annual branches of each plant were randomly selected and the leaf number, total leaf area, branch and leaf biomass of each branch were measured at the early growth stage(early June) as well as the peak and the late growth stages(mid-August and late November). The functional traits of branches and leaves were calculated. According to the 5-point method, environmental factors were monitored in the sample plots in the morning, noon, and evening. With the statistical monitoring data, analyses of variance, significant difference, correlation, and redundancy were applied to analyze the significance of differences, variability of functional traits, the correlation between branch and leaf traits, and their relationship with environmental factors during the early, peak and late growth stages of L. angustifolia. The aim is to explore the growth pattern of L. angustifolia and its adaptability to environment in Harbin area. The results showed that the branch and leaf growth of L. angustifolia exhibited significant differences at different growth stages. Branch water content, specific leaf area, total leaf area, single leaf area, leaf biomass, and leaf water content significantly increased and reached the maximum values during the peak growth period, which were favorable to the accumulation and transportation of organic matter and to the vigorous plant growth. Specific leaf mass and leaf dry matter mass were significantly increased at the late growth stage, which facilitated the plant to provide nutrients for overwintering. The functional trait correlations of branches and leaves were closed at the early and peak growth stages, reflecting the synergistic growth of branches and leaves and facilitating plant morphological construction. Overall, the variability of leaf growth was greater than that of branches. The variability of branches and leaves during the peak growth period was low, which stabilized plant growth. The variability of branches and leaves at the late growth stage was moderate and was related to the physiological metabolism of the plant in response to low-temperature regulation. The dominant role of each environmental factor on the growth of L. angustifolia differs at different growth stages. Temperature is the main influence factor on the growth of L. angustifolia at the early growth stage. While soil conductivity is the main influence factor at the peak growth stage, and absolute soil moisture content is the main influence factor at the end growth stage during the growth of L. angustifolia.更多还原