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采用不同透光率的遮荫网进行遮荫处理,研究不同光照强度对臭辣树(Evodia fargesii Dode)容器苗生长和苗木质量的影响。结果表明,7月初至8月中旬为苗高生长速生期,7月初至9月底为地径生长速生期;60%光照下苗高最高、主根长最大,分别与除40%、5%之外的处理差异显著;100%光照下地径最大、3种生物量最大、质量指数最大、高径比最小、地上与地下生物量比值最小,皆与其他处理皆显著差异。综合以上形态指标,100%光照培养下的当年生臭辣树容器苗苗木质量最好,1年生苗高可达34.5cm,地径为5.45 mm,主根长15.89cm,总生物量4.89g,茎生物量1.73g,根生物量1.84g,高径比和根茎比值最小,地上、地下生物量分配及质量指数更合理。因此,建议选择100%光照环境进行培育臭辣树容器苗。
Shading treatment with shading net with different light transmittance was carried out to study the effects of different light intensities on the growth and seedling quality of container seedlings of Evodia fargesii Dode. The results showed that from early July to mid-August, the seedling height was fast-growing, and from July to the end of September was the rapid growth of soil diameter. The seedling height was the highest under 60% light and the main root length was the largest except for 40% and 5% The difference was significant between the treatments of 100% light, the largest of three kinds of biomass, the highest of the mass index, the smallest of the height-diameter ratio, and the lowest of the aboveground and underground biomass. According to the above morphological indexes, the seedling quality of the container was the best in the 100% light culture year. The height of one-year-old seedling was 34.5cm, the diameter was 5.45 mm, the main root length was 15.89cm, the total biomass was 4.89g, 1.73 g and 1.84 g biomass, the ratio of height to diameter and the ratio of rhizome and rhizome were the lowest. Aboveground and underground biomass allocation and quality index were more reasonable. Therefore, it is recommended to choose 100% light environment to cultivate smelly tree container seedlings.