格氏栲天然林凋落物对马尾松种子萌发的影响  

Effects of Castanopsis kawakamii Forest Litter on Seed Germination of Pinus massoniana

作　　者：贾梅花 王哲 刘金福[1,2,3] 晋梦然 何中声 邢聪[1,2,3] 施友文 沈彩霞 JIA Mei-hua;WANG Zhe;LIU Jin-fu;JIN Meng-ran;HE Zhong-sheng;XING Cong;SHI You-wen;SHEN Cai-xia(College of Forestry,Fujian Agriculture and Forestry University,Fuzhou 350002,Fujian,China;Cross-Strait Nature Reserve Research Center,Fujian Agriculture and Forestry University,Fuzhou 350002,Fujian,China;Key Laboratory of Fujian Universities for Ecology and Resource Statistics,Fuzhou 350002,Fujian,China;Qixinghe National Wetland Park in Fufeng,Fufeng 722200,Shanxi,China;Administration Station of Castanopsis kawakamii Nature Reserve in Xinkou of Sanming,Sanming 365000,Fujian,China)

机构地区：[1]福建农林大学林学院,福建福州350002 [2]福建农林大学海峡自然保护区研究中心,福建福州350002 [3]生态与资源统计福建省高校重点实验室,福建福州350002 [4]扶风七星河国家湿地公园,陕西扶风722200 [5]三明莘口格氏栲自然保护区管理站,福建三明365000

出　　处：《林业科学研究》2021年第1期128-136,共9页Forest Research

基　　金：国家自然科学基金(31700550;31770678);福建省自然科学基金(2019J01367);福建省林业科技推广项目(2018TG14-2)。

摘　　要：[目的]了解格氏栲天然林凋落物对主要伴生种马尾松种子萌发与胚根生长的影响。[方法]通过探究天然林凋落物不同分解层及浓度浸提液对马尾松种子萌发和胚根生长的化感效应。[结果]表明:(1)影响马尾松种子萌发的主要因素是凋落物分解层,未、全分解层凋落物对马尾松种子萌发无显著作用;半分解层抑制发芽率和发芽指数,促进发芽势。(2)影响胚根生长的主要因素是浸提液浓度和作用时间,并受分解层-浓度-时间综合作用,未分解层对马尾松种子整个胚根生长期除1∶5浓度呈抑制作用外,随浓度降低促进作用增强,1∶100浓度时促进作用最强;半分解层呈低浓度和高浓度促进,中间浓度抑制;全分解层总体呈促进作用,且随浓度降低促进作用减弱。(3)对应分析表明不同分解层-浓度对马尾松种子萌发无显著相关性,对胚根生长有显著相关性。[结论]不同分解层凋落物浸提液对马尾松种子萌发作用较弱,对胚根生长在低浓度下呈促进作用,高浓度未分解层浸提液有抑制作用,而半分解和全分解浸提液具有促进作用,凋落物化感作用更明显作用于胚根生长。[Objective]In order to understand the effect of Castanopsis kawakamii natural forest litter on seed germination and radicle growth of Pinus massoniana,the main associated species.[Method]The allelopathic effects of different decomposition layers and concentration extracts of C.kawakamii natural forest litter on seed germination and radicle growth of P.massoniana were investigated.[Result](1)The main factors affecting the seed germination of P.massoniana were litter decomposition layer,the litter of undecomposed and fully decomposed layers had no significant effect on the germination of P.massoniana seeds,the semi-decomposed layer inhibited the germination rate and germination index and promoted the germination potential.(2)The main factors affecting radicle growth were the concentration and time of extract and the combined action of decomposition layer-concentrationtime.The un-decomposed layer inhibited the whole radicle growth period of P.massoniana seeds except 1:5,and increased with the decrease of concentration,and promoted the most at 1:100,the semi-decomposed layer was promoted by low concentration and high concentration,and the intermediate concentration was inhibited,fully decomposed layer was promoted and weakened with the decrease of concentration.and the promotion effect was the strongest with the decrease of concentration.(3)Correspondence analysis showed that different decomposition layersconcentrations had no significant effect on seed germination of P.massoniana,but had a significant correlation with radicle growth.[Conclusion]The litter extract of different decomposition layers had weak effect on seed germination of P.massoniana,and promoted radicle growth at low concentration,inhibited radicle growth at high concentration,and promoted semi-decomposition and fully decomposition extract.The allelopathy effect of litter on radicle growth was more obvious.

关 键 词：凋落物浸提液 化感作用 马尾松 种子萌发 胚根生长 格氏栲天然林 

分 类 号：S792.17[农业科学—林木遗传育种]