氮肥对杉木幼苗生长的影响研究

Effect of Nitrogen Fertilizer on the Growth of Cunninghamia lanceolata Seedlings

旨在探究不同氮素水平对杉木幼苗生长的影响,为杉木幼苗的合理施肥提供科学依据。采用随机区组设计,在师宗县彩云镇进行试验,设置了4个处理组别,分别施放不同量的氮肥,测定苗高、地径和生物量等生长指标。结果表明:实验结果显示,不同氮素水平对杉木幼苗的生长具有显著影响。随着氮素水平的增加,杉木幼苗的苗高、地径和各部分生物量呈现先增加后趋于稳定的趋势。处理组C(4 g/株)表现出最佳的生长状态,其苗高、地径和各部分生物量均显著高于其他处理组。指出了适量的氮素施用能显著促进杉木幼苗的生长,但过量施肥并不能进一步增加幼苗的生长速度和生物量。因此,在实际生产中,应根据杉木幼苗的生长状态和土壤情况合理施肥,以提高杉木幼苗的生长效率,同时避免资源浪费和环境污染的发生。研究结果可为杉木的科学育苗提供理论指导。

This study aims to explore the effects of different nitrogen levels on the growth of Cunninghamia lanceolata seedlings,and provide scientific basis for rational fertilization of Cunninghamia lanceolata seedlings.A randomized block design was used to conduct an experiment in Caiyun Town,Shizong County.Four treatment groups were set up,and different amounts of nitrogen fertilizer were applied to measure growth indicators such as seedling height,ground diameter,and biomass.The experimental results showed that different nitrogen levels had a significant impact on the growth of Cunninghamia lanceolata seedlings.With the increase of nitrogen levels,the seedling height,diameter,and biomass of various parts of Cunninghamia lanceolata seedlings show a trend of first increasing and then stabilizing.Treatment group C(4 g/plant)showed the best growth state,with significantly higher seedling height,ground diameter,and biomass in all parts compared with other treatment groups.Moderate nitrogen application can significantly promote the growth of Cunninghamia lanceolata seedlings,but excessive fertilization cannot further increase the growth rate and biomass of seedlings.Therefore,in actual production,reasonable fertilization should be applied based on the growth status and soil conditions of Cunninghamia lanceolata seedlings to improve their growth efficiency,while avoiding resource waste and environmental pollution.This study provides theoretical guidance for the scientific seedling cultivation of Cunninghamia lanceolata.