CAJ | 학술논문

应用主成分分析和逐步聚类分析方法研究了格木轻基质容器苗的分级标准,并通过各级苗木的造林效果试验对分级结果进行验证.结果表明,格木苗可分为3级,Ⅰ级苗:苗高(H)≥23 cm、地径(D)≥0.41 cm,Ⅱ级苗:23 cm＞H≥19cm、0.41 cm＞D≥0.36 cm,Ⅲ级苗:日＜19 cm、D＜0.36 cm;应用不同级别苗木进行造林试验,1年生时Ⅰ、Ⅱ级苟的保存率均在90% 以上,而两者间苗高、地径生长量差异显著,Ⅲ级苗的保存率(低于60% )以及生长量极显著低于Ⅰ、Ⅱ级苗.说明格木轻基质容器苗的上述分级标准是合理的.
응용주성분분석화축보취류분석방법연구료격목경기질용기묘적분급표준,병통과각급묘목적조림효과시험대분급결과진행험증.결과표명,격목묘가분위3급,Ⅰ급묘:묘고(H)≥23 cm、지경(D)≥0.41 cm,Ⅱ급묘:23 cm＞H≥19cm、0.41 cm＞D≥0.36 cm,Ⅲ급묘:일＜19 cm、D＜0.36 cm;응용불동급별묘목진행조림시험,1년생시Ⅰ、Ⅱ급구적보존솔균재90% 이상,이량자간묘고、지경생장량차이현저,Ⅲ급묘적보존솔(저우60% )이급생장량겁현저저우Ⅰ、Ⅱ급묘.설명격목경기질용기묘적상술분급표준시합리적.
Classification standard of container seedlings growing with light media for Erythrophleum fordii Oliv.was studied by principal components and step-by-step cluster analysis methods,and its effect was tested by a planting trial.The results showed that the seedlings could be divided into three grades.seedlings with H ≥23 cm and D ≥0.41 cm belong to the first grade.23 cm＞H≥19 cm and 0.41 cm＞D≥10.36 cm to second grade.and H＜19 cm and D＜0.36 cm to the third grade.This was then confirmed by the planting trial.There was no significant difference between seedlings of the first and second grade in survival ratemore than 90%)while significant different(P＜0.05)in height and diameter growth when one year old,and the survival rate(below 60%)and seedling growth of the third grade were remarkably lower than those of the first and scond grades.It could thus be concluded that the classification standard was suitable for light media container seedlings of this species.