海南省湿加松无性系苗期生长动态分析
2017-07-12薛杨陈毅青刘宪钊王小燕宿少锋林
薛杨+陈毅青+刘宪钊+王小燕+宿少锋+林之盼+薛雁文



摘 要 对湿加松10个无性系苗期苗高和地径的生长动态进行调查,并用 Logistic 方程对苗高和地径的生长动态进行拟合,分析雨热同期湿加松的生长动态规律及生长参数。结果表明:湿加松无性系苗期年生长高度符合“S”型生长曲线。以湿加松地径和苗高划分其苗木的生长阶段,则地径和苗高的速生期持续时间分别为94~125 d 和 60~77 d。
关键词 海南 ;湿加松 ;无性系 ;苗期 ;生长参数;
中国分类号 S791.24 文献标识码 A Doi:10.12008/j.issn.1009-2196.2017.06.007
Growth Dynamic Analysis of Clones of Slash Pine×Honduras Caribbean
Pine at the Nursery Stage in Hainan Province
XUE Yang1) CHEN Yiqing1) LIU Xianzhao2)
WANG xiaoyan1) SU Shaofeng1) LIN Zhipan1) XUE Yanwen1)
(1 Hainan Forsetry Institute, Haikou, Hainan 571100
2 Resrarch Institute of Forest Resource Information Techniques,
Chinese Academy of Forestry, Beijing 100091)
Abstract Ten clones of hybrids between slash pine (Pinus elliottii Engelm. var elliottii L. & D.) and Honduras caribbean pine (Pinus caribaea Mor. var hondurensis B. & G.) at the nursery stage were selected to observe their growth dynamics in plant height and ground diameter, and the growth dynamics were was fitted by using Logistic equation to analyze the growth dynamic changes and growth parameters of the clones growing in the same period of hot and rain. The results showed that the annual growth height of the clonal plants at the nursery stage was consistent with the "S" growth curve. When the ground diameter and plant height were used to determine the growth stage of the plants, the fast growing stages for the ground diameter and plant height lasted for 94 ~ 125 days and 60 ~ 77 days, respectively.
Keywords Hainan ; slash pine × Honduras caribbean pine ; clone ; nursery stage ; growth parameters
湿加松又称杂种松,是湿地松(Pinus elliottii var. elliottii)与加勒比松(古巴加勒比松[Pinus caribaea var. caribaea]、洪都拉斯加勒比松[P. caribaea var. hondurensis]和巴哈马加勒比松[P. caribaea var. bahmaensis])的杂交后代[1]。湿地松与加勒比松的杂交改良和遗传优化使其子代湿加松具有生长快、抗逆性强、干形通直等优点。湿加松最早由澳大利亚昆土兰林业研究所培育而成,后于20世纪80年代后期通过多代杂交选育产生显著杂种优势的品系[2]。中国于20世纪90年代率先在广东省利用国内种质资源开展杂交试验,并利用国外少量杂种开展造林和引种栽培试验,并随后在广西、福建、四川、云南等亚热带南缘的省(区)广泛引种栽培,表现出良好的生长效果和适应性[2]。海南省2007年从广东省引种湿加松,经过10 a育苗和造林研究,在热带地区表现出优良的抗逆性,生长效果和产脂量明显优于加勒比松和湿地松,尤其是雨热同期季节,其生长效果最佳[3]。
目前,国内关于湿加松的研究主要集中在湿加松良种选育、扦插繁殖、组织培养和遗传改良等方面。……
