It was demonstrated by cutting experiment of Elacocarpus sylvestris,Liquidambar formosana,Altingia gracilipes,Magnoliaceae skinneriana,Temstroemia gymnanthera,with semi-lignified branches treated by different root-inducing regulator and concentration and substrate at Changle Forest Experamental Station of Yuhang District of Zhejiang in June 2003 year that cutting survival rate,rooting rate,rooting coefficient,length of the roots and the quantity of the new roots of 5 tree species had significant different after six month,and it was different that the reaction of different tree species to rooting-inducing regulator.The best treatment combination of 5 tree species was:Elacocarpus sylvestris:NAA, 250 mg·L-1,rooting rate 97.0%;Liquidambar formosana:IBA,250 mg·L-1,rooting rate 64.5%;Altingia gracilipes:ABT1, 250 mg·L-1, rooting rate 74.6%;Magnoliaceae skinneriana:IBA,500 mg·L-1,rooting rate 56.1%;Temstroemia gymnanthera:IBA,250 mg·L-1,rooting rate 95.2%.The different cutting substrates had significant influence on rooting rate.The substrate No.2 (yellow soil:river sand =7∶3(volume ratio)) was best.

The height and DBH of 5 to 7-year trees of filial generation of single parent were tested and analysed in 1997-1999 in second generation seed orchard of Chinese fir(Cunninghamia lanceolata(Lamb.)Hook) in Changle Forestry Center.The results showed that the growth traits of height and DBH were most significantly different among the tested families.The heritabilities of height and DBH of families different years in were 67.02%、73.41%、54.95%、59.18%、55.48% and 47.37% respectively.The genetic gain of families of plus tree of superior provenance and hybrid match was more than that of the families of plus tree of superior families of first generation seed orchard of Chinese fir.The genetic gain of second generation seed orchard was more than that of the filial generation of superior provenance and mixed families filial generation of first generation and 1 and(1.5) generation seed orchard.The selection was effective on material of second generation of Chinese Fir and the second generation seed orchard rebuilding was successful.

By investigating the key survival and growth indexes, the results showed:(1)the stage of the seeding has the most important effective.The survival rate of the cuttings was the highest by using 1-year-old cuttings.The older the cuttings,the lower the survival rate.(2)There was no obviously rules by using ABT.(3)By comparing the results of covering with black & white plastic velum and no covering,the white one is considered better than the two others.In practice work,the type of A1B1C2 was better.The concentration of ABT could be reduced,but the time of soaking should be prolonged.

The three main economic traits of DBH, DBH of dominant tree and wood basic density of dominant tree in 13-year-old progeny stand from the second-generation seed orchards of Chinese fir in Changle of Yuhang district, Zhejiang province were analyzed. The results showed that three economic traits were highly significant on each trait among the families, and their broad heritability was high. The genetic correlation coefficient was weakly negative correlated among growth traits and wood basic density. The correlation coefficient was significant positive correlated among 3-year-old tree height, 7-year-old tree height and DBH, 13-year-old DBH. Ten better families and individual plants were selected in interim period by index method with two traits of DBH and wood basic density, keeping wood basic density unchanged to compared with experiment population, the average DBHs of the family and individual plant were 7.59% and 59.16% higher than the experiment population respectively.

以乐东拟单性木兰14个种源试验林幼林为材料,利用层次分析方法对其进行综合评价。研究结果表明:乐东拟单性木兰树高、胸径、树冠浓密度、叶面积、造林保存率和叶色6个性状地理种源差异显著,改良潜力大;这6个性状的广义遗传力分别为0.835、0.811、0.857、0.823、0.950、0.708,说明环境因子对这些性状的影响较小,而遗传因子对其影响较大。通过层次分析法对14个乐东拟单性木兰种源进行分析,乐东拟单性木兰种源优劣排序为:SC >XN >LQ >JL >SZ >RS > CJ >MX >QY >LP >RJ >LN >LD >JFL。其中福建顺昌、湖南新宁、浙江龙泉和福建将乐4个种源在浙北地区具有推广和应用价值,而江西龙南、海南乐东及海南尖峰岭3个种源在浙北地区的生长、适应和观赏性状表现较差。

目的 开发操作简便、破坏性小且结果可靠的弹性模量无损评估技术，为实现以大群体试验材料为基础的遗传选择和评估，培育速生优质林木良种奠定基础。 方法 以22年生湿地松自由授粉家系测定林为研究对象，采用力学阻力仪(Pilodyn)和应力波速(V)记录仪(AV)等活立木无损评估仪器和方法以及木材物理力学常规检测方法，建立活立木弹性模量评估技术体系。 结果 Pilodyn测定值Pr与实测基本密度(ρ)间呈显著负相关(P < 0.01)；弹性模量测定值MOE_B与弹性模量(计算值)MOE(MOE=ρV²)之间呈极显著线性相关关系，其线性回归模型为MOE_B=2.013 3+0.828 6 MOE，决定系数R²=0.854 1；利用ρ和V计算的弹性模量值MOE与利用Pr和V计算的弹性模量相对值MOE_P(MOE_P=PrV²)间呈极显著正相关关系(P < 0.001)，回归模型为MOE = 0.400 7+0.231 1 MOE_P, 决定系数R²=0.734 0；弹性模量MOE与V值相关极显著(P < 0.001)，V与MOE的回归方程为MOE= -5.121 8+3.239 4 V, 决定系数R²=0.921 9。 结论 在遗传选择时弹性模量(计算值)完全可以代表弹性模量测定值进行评估与选育；可直接利用MOE_P作为各样木的弹性模量值参与遗传分析；同时建立了MOE与V值之间的回归方程，在比较同一测定群体弹性模量值相对大小时也可直接比较V值，大大减少了工作量。建立的模型对其它树种测定具有参考意义，但尚需检验。