白桦容器育苗的适宜基质筛选  

Substrate Screening for Container Seedlings of Betula platyphylla

作　　者：贾斌英[1] 徐惠德 刘桂丰[3] 李开隆[3] 孙志虎[3] 彭红梅[3] 滕文华[3] 

机构地区：[1]沈阳农业大学,沈阳110161 [2]黑龙江省佳木斯市孟家岗林场 [3]林木遗传育种与生物技术教育部重点实验室(东北林业大学)

出　　处：《东北林业大学学报》2009年第11期64-67,共4页Journal of Northeast Forestry University

基　　金：国家"十一五"科技支撑项目和科技基础工作专项(2006BAD24B05;2007FY110400-3-3);黑龙江省攻关重大项目(GA06B301-4)资助

摘　　要：为了给东北地区白桦(Betula platyphyllaSuk.)容器育苗提供适宜的基质配方,在东北林业大学白桦强化育种基地温室内,以河沙、草炭和耕作土为基质,对其18种配比的育苗结果进行了筛选。结果表明:3种基质的不同配比能够显著影响白桦苗木的SPAD值、苗高、地径和全株生物量。当河沙体积分数在0～20%的范围内,白桦苗木的SPAD值、苗高、地径和全株生物量处于最高值,随着基质中河沙比例的进一步增加,各指标呈抛物线下降;随着草炭比例的增加,各指标则呈现上升趋势;耕作土比例的变化,各指标基本不变。综合基质不同配比下白桦幼苗的SPAD值、地径、苗高和全株生物量结果,18种育苗基质可分为3组:第1组为S6、S9、S11、S16处理,第2组为S3、S7、S10、和S15处理,第3组为S1、S2、S4、S5、S8、S12、S13、S14、S17和S18处理。遵循育苗基质的适用性和经济性原则,白桦容器育苗的适宜基质配比为S6处理,即V(草炭)∶V(沙子)∶V(耕作土)=2∶1∶7。An experiment was conducted to screen the suitable substrate for container seedling cultivation in the green house of the Intensive Breeding Base of Betula platyphylla in Northeast Forestry University, Harbin City, Heilongjiang Province. The cultivation effects for different proportionings of peat, sand, and cultivated soil were analysed. Results showed that different proportionings of peat, sand, and cultivated soil could significantly affect the relative content of chlorophyll, seedling height, basal diameter, and whole-plant biomass. As sand content was in the range of 0 -20% , the chlorophyll content, seedling height, basal diameter, and whole-plant biomass reached their maximum values, while the above-mentioned indices parabolically decreased with increasing percentage of sand. All the indices showed an increasing trend with increasing percentage of peat and a constant trend with increasing percentage of cultivated soil. Different proportionings of peat, sand, and cultivated soil could be classified into three groups according to the integrated analysis of relative chlorophyll content, basal diameter, seedling height, and whole-plant biomass. The optimum substrate proportion for cultivating con- tainer seedlings of B. plat）phylla was screened out on the basis of economical and applicable principles, namely, the proportion of peat, sand, and cultivated soil was 2： 1： 7.

关 键 词：白桦 容器苗 基质配比 

分 类 号：S723.1[农业科学—林木遗传育种] S792.15[农业科学—林学]