作 者：
姚光刚;李国雷;郑永林;薛敦孟;李世安;袁启华
单 位：
北京林业大学林学院;北京市温泉苗圃;北京市大东流苗圃
关键词：
槲栎;容器苗;缓释肥;养分;非结构性碳水化合物
摘 要：
【目的】探究缓释肥施肥量对槲栎(Quercus aliena)容器苗生长、养分积累及非结构性碳水化合物(NSC)的响应规律。【方法】以槲栎1年生容器苗为研究对象,采用完全随机设计,使用缓释肥(15%N+9%P2O5+12%K2O+2%MgO+微量养分元素(TE))设置5个施肥处理0.24、0.95、1.91、3.81和5.71 g/L,测定生长季末槲栎苗高、地径、生物量、养分及非结构性碳水化合物含量与浓度。【结果】0.95、1.91和3.81 g/L施肥水平下,苗高、整株生物量、整株氮含量、淀粉含量和可溶性糖含量均高于0.24 g/L的施肥水平;当施肥量增至5.71 g/L时,整株苗木淀粉含量和可溶性糖含量较施肥量0. 95～3.81 g/L(施氮量100～400 mg/株)时下降,苗高和生物量则无显著变化。【结论】槲栎容器苗合理的施肥区间为0.95～3.81 g/L,槲栎1年生容器苗组织矿质元素合理的浓度范围为:根系中N 1.63%～1.93%、P 0. 48%～0. 52%、K 0. 65%～0.79%;茎中N 1.11%～1.43%、P 0.24%～0.25%、K0.28%～0. 44%。从提高利用率、节约成本、减少环境污染角度考虑,推荐槲栎最佳缓释肥施用量为0.95 g/L,即施氮量100 mg/株;可溶性糖和淀粉含量是筛选槲栎苗木施肥量的重要指标,可推荐用于槲栎苗木的质量评价。
译 名：
Effects of slow-release fertilizer rate on the quality of Quercus aliena container seedlings
作 者：
YAO Guanggang;LI Guolei;ZHENG Yonglin;XUE Dunmeng;LI Shian;YUAN Qihua;College of Forestry,Beijing Forestry University;Beijing Dadongliu Nursery;Beijing Wenquan Nursery;
单 位：
YAO Guanggang%LI Guolei%ZHENG Yonglin%XUE Dunmeng%LI Shian%YUAN Qihua%College of Forestry,Beijing Forestry University%Beijing Dadongliu Nursery%Beijing Wenquan Nursery
关键词：
Quercus aliena Bl.;;container seedling;;slow-release fertilizer;;nutrients;;non-structural carbohydrate(NSC)
摘 要：
【Objective】Determine the effects of slow-release fertilizer on seedling growth,nutrient accumulation,and non-structural carbohydrate( NSC) of Quercus aliena container seedlings.【Method】Experiments were conducted using five different rates( 0.24,0.95,1.91,3.81 and 5.71 g/L) of slow-release fertilizer( 15% N+9% P2O5+12% K2O+2%MgO+trace element) per liter media with a completely random design. At the end of the first growing season,the seedling height,diameter,biomass,as well as content and concentration of nutrients and NSC of Q. aliena were determined.【Results】Height,plant biomass,plant nitrogen content,starch content,and soluble sugar content were higher with0. 95,1.91,and 3.81 g of slow-release fertilizer per liter media than those with 0.24 g per liter media. When the rate increased to 5.71 g per liter media,no beneficial effects on height were observed. In contrast,lower plant starch content and soluble sugar content were observed at a rate of 5.71 g per liter media.【Conclusion】The recommended fertilization rate was 0.95-3.81 g per liter media of slow-release fertilizer for Q. aliena container seedlings,which is equivalent to100-400 mg N per seedling. Tissue nutrient concentration was used by foresters to gauge nutritional status as follows: in root,N 1.63%-1. 93%; P 0. 48%-0. 52%; K 0. 65%-0. 79%; in stem,N 1. 11%-1. 43%; P 0. 24%-0. 25%; K0. 28%-0.44%. From the fertilizer use efficiency,cost and environment protection perspective,the fertilization rate was determined as 0.95 g slow-release fertilizer per liter media( 100 mg N per seedling). Soluble sugar and starch content are important indices to optimize nursery fertilization.
