文献类型：期刊文献

中文题名：用随机化分枝抽样法估测猴耳环人工林的冠层生物量

英文题名：Estimating Crown Biomass of Plantation-grown Archidendron clypearia by Randomized Branch Sampling

作者：金文云[1] 王彩云[1] 陈一安[2] 李梅[1] 杨佩容[2] 陈祖旭[1] 黄世能[1]

第一作者：金文云

机构：[1]中国林业科学研究院热带林业研究所热带林业研究国家林业和草原局重点实验室;[2]惠州昊林生物科技有限公司

年份：2019

卷号：17

期号：6

起止页码：1990-1997

中文期刊名：分子植物育种

外文期刊名：Molecular Plant Breeding

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

基金：广东省林业科技创新项目(2017KJCX004);广东省科技厅-社会发展领域-公益研究与能力建设项目(2017A020213002);广州市林业和园林局科技服务项目(穗林园科信合[2016]03号)共同资助

语种：中文

中文关键词：猴耳环;人工林;冠层生物量;随机化分支抽样法;辅助变量功能系数

外文关键词：Archidendron clypearia;Plantation;Crown biomass;Randomized branch sampling;Function coefficient of auxiliary variable

分类号：S792.11

摘要：为了引入更简便的估测猴耳环人工林冠层生物量的,针对广东省惠州市惠阳区一片猴耳环人工林冠层生物量估测,本研究首次引进、介绍了一种高效而非破坏性的无偏估计取样策略——随机化分枝抽样法(randomized branch sampling, RBS),提出并测试了"辅助变量功能系数(以Z表示)"便于计算RBS的选择概率。结果表明,以枝条基径作为冠层生物量RBS估测的辅助变量是合适的,其功能系数取Z=2 (即基径的平方)时估测效果最佳,树木个体的三级分枝数量越多RBS的估测方差越大,两者呈显著正相关关系(r=0.639 3,p=0.000 6),这就导致年龄较大及枝下高较长、易萌发三级枝条的树木个体冠层生物量估测值产生较大的方差。全路径的估测值与实测值仍存在<3.5%的相对标准误差;4～6条取样路径数的估测值相对标准误差为4.56%～5.45%,能减少约2/3的工作量,可作为猴耳环冠层生物量RBS取样的路径选择范围。RBS确是一种高效的林木生物量取样策略,希望业内对此法产生兴趣并加以应用和验证,以期日后为行业提供一定的参考依据。
In order to introduce a more simple method to estimate the crown biomass of Archidendron clypearia.plantation. This study introduced an efficient and non-destructive samping method, the Randomized Branch Sampling(RBS), as well as proposed and tested a new index namely function coefficient of auxiliary variable(presented by Z) for the better calculation of the selection probability which is essential to conduct RBS. The results showed that diameter at branch base was an appropriate auxilliary variable to be chosen in the conduct of RBS,and optimal results were obtained while its function coefficient of Z value was 2(i. e. the base diameter square).The variances of RBS estimates increased with increasing number of the third order branches from the main stems with a coefficient of correlation of r =0.6393 at p =0.000 6. This caused larger variances of estimates of crown biomass in elder individual trees and those with longer clear bole lengths which tend to prodce more third order branches. RBS crown biomass estimates with all possible paths selected recorded a relative standard error <3.5%,not theoretically zero but acceptable. Selection of 4~6 paths produced 4.56%~5.45% of relative standard errors of the RBS estimates, and reduced 2/3 working load approximately. This sampling method might appear to be efficient in obtaining precise estimates of the crown biomass of A. clypearia plantation, and worth trying and testing in measurements of tree attributes in the future, so as to provide certain reference basis for the industry in the future.