红皮树在南岳的引种栽培

南岳树木园引种红皮树,经过20 a的驯化栽培,现已开花结实。作者介绍了红皮树采种、育苗、绿化大苗培育以及造林等引种栽培技术,同时,对其苗期以及引种20 a后生长情况进行了抽样调查,为红皮树的开发利用提供了依据。

红皮树穴盘育苗技术研究

[目的]提高红皮树容器育苗的出苗率、成苗率和移栽成活率,为其开发利用提供优质苗木。[方法]设计3种基质配方3、种穴盘规格、不同配比的肥料在2种光照强度下进行红皮树穴盘育苗试验,探索红皮树穴盘育苗技术。[结果]泥炭+珍珠岩、森林腐殖土+黄心土、树皮粉+黄心土3种基质配方均较适合红皮树穴盘育苗。苗木生长与穴盘容积呈正比。不同生长期肥料配比与苗木质量关系密切。加盖60%透光度遮阳网处理的苗木生长正常,质量指数比全光照处理高27.3%。[结论]培育半年红皮树苗可选用72S型育苗,1年苗可选用林50T型育苗,困难地造林可选用林72T型育苗。苗木速生期和生长后期宜按一定配比施用N∶P∶K液肥。

红皮树营养杯育苗技术

报道亚热带优良珍贵树种红皮树(Styrax suberifolius Hook.et Arn.)的种子采集、储藏、营养土配制、营养杯选择、播种、苗期管理等播种育苗技术。

红皮树一年生播种苗生长规律初报

本文报道了木本能源植物红皮树种子的萌发特性,1年生播种苗的生长规律和等级划分等初步结果。提出贵州红皮树1年生苗划分为两个等级,Ⅰ级苗苗高≥20 cm,地径≥0.4 cm;Ⅱ级苗苗高≥15 cm,地径≥0.3:种子宜采用砂藏层积催芽春播,播种期宜在3月上旬至下旬,播种量控制在每平方米45g左右。

红皮树母树林生物量调查初报

对黎平县9年生红皮树母树林的生长和生物量进行了调查分析,结果表明:9年生红皮树母树林平均树高、地径、枝下高、冠幅、单株材积分别是5.26m、13.82cm、0.59m、3.59m、0.0576m^3。标准木生物量为33.46kg,地上部分30.15kg,地下部分3.31kg,母树林林分生物量为27.8721 t·hm^(-2)。各器官生物量大小表现为树干>枝>根>叶,各器官含水率大小表现为叶>根>枝>树干。

Stem flow chemistry of Picea glehnii,Abies sachalinensis and Alnus japonica and its effect on the peat pore water chemistry in an ombrogenous mire in Ochiishi,eastern Hokkaido,Japan

We investigated the chemical properties of stemflow of Picea glehnii,Abies sachalinensis and Alnus japonica as well as peat pore water chemistry,including the distance and depth profiles of pore water chemistry,in an ombrogenous mire.The effect of stemflow on the peat pore water chemistry was clear at the stem base in the peat forest in the mire,and the peat pore water around the stem base of a tree had its own chemical properties specific to each species.P.glehnii showed the highest concentration of salts both in stemflow and peat-pore water,whereas A.japonica showed the lowest concentrations;however,the gradient of the chemical environment from the stem base to outside of the canopy is formed.The peat pore water chemistry under the canopy was mainly controlled by the chemical processes diluted by the abundant peat pore water;the stemflow movement in the high water content of the peat was more slowly because of the flat topography（〈 1o）.This would be due to the fact that the chemicals in stemflow would be diluted by the abundant peat pore water.The spatial heterogeneity of chemical environment between microsites within forested peatland would be also contributed indirectly through the control of microorganism activity,and nutrient regeneration mediated the surface water and the stemflow of the dominant canopy trees.