CAJ | 학술논문

选择杉木第2代种子园8个家系,分不同苗木等级进行造林对比试验.在杉木小径材培育年限16 a内,对1～5年、8年和16年生杉木的生长量进行分析,结果表明:不同等级的苗木,造林后的前4年在树高、胸径和材积生长方面差异达显著水平,但随着年龄增大其差异明显减弱,5年生后差异不显著;年抽高的影响表现在造林的前2年,第3年差异不显著;家系间的差异达极显著水平;家系与等级苗间交互作用不显著;造林成活率有一定的差异;子代和亲代在生长性状上存在着极密切的相关关系.生产中在选择优良家系或品系壮苗的基础上可取得40%以上材积增益.同时家系和个体的早期生长量受到苗木质量的影响较大.因此优良家系或优良个体的选择在苗木5年生以后进行,才能取得更好的选择效果.
선택삼목제2대충자완8개가계,분불동묘목등급진행조림대비시험.재삼목소경재배육년한16 a내,대1～5년、8년화16년생삼목적생장량진행분석,결과표명:불동등급적묘목,조림후적전4년재수고、흉경화재적생장방면차이체현저수평,단수착년령증대기차이명현감약,5년생후차이불현저;년추고적영향표현재조림적전2년,제3년차이불현저;가계간적차이체겁현저수평;가계여등급묘간교호작용불현저;조림성활솔유일정적차이;자대화친대재생장성상상존재착겁밀절적상관관계.생산중재선택우량가계혹품계장묘적기출상가취득40%이상재적증익.동시가계화개체적조기생장량수도묘목질량적영향교대.인차우량가계혹우량개체적선택재묘목5년생이후진행,재능취득경호적선택효과.
The comparative tests of forestation were made. The different grade seedlings, which were from 8 Chinese fir families of the second generation seed orchard were selected as the samples. Within 16 years, which was the rotation age for small dimension wood cultivation, the growth rate were analyzed when tree was 15 years, 8 years and 16 years old. The results showed that there were significant differences among height, DBH and stem volume of different grade seedlings before the age were 4-year. And those were not significant after age at 5. There were not significant differences among annual increment of height among different grade seedlings before the age was 4-year, but it was affirmative among families. Interaction of grade and family was not significant. There were some differences among rate of survival and there was intimate correlativity on growth between parent and filial generation. By using of superior families or strains, 40% volume gain would be achieved. The early growth of families or individuals was affected significantly by seedling quality. Therefore, we proposed that families or individuals selection should be performed after age of 5.