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林业资源管理 ›› 2019, Vol. 0 ›› Issue (4): 74-79.doi: 10.13466/j.cnki.lyzygl.2019.04.011

• 科学研究 • 上一篇    下一篇

大兴安岭南段不同林龄白桦种子雨与地表种子库研究

冯倩倩(), 周梅(), 赵鹏武, 乌艺恒   

  1. 1.内蒙古农业大学,呼和浩特 010019
    2.内蒙古赛罕乌拉森林生态系统国家定位研究站,内蒙古 赤峰 025150
  • 收稿日期:2019-05-21 修回日期:2019-06-02 出版日期:2019-08-28 发布日期:2020-10-20
  • 通讯作者: 周梅
  • 作者简介:冯倩倩(1992-),女,山西吕梁人,在读硕士,研究方向:森林生态学。Email: 1192920179@qq.com
  • 基金资助:
    国家自然基金重点项目(41530747)

Study on Seed Rain and Surface Seed Bank of Betula platyphylla in Different Ages in the Southern Daxing'anling Mountains

FENG Qianqian(), ZHOU Mei(), ZHAO Pengwu, WU Yiheng   

  1. 1. Inner Mongolia Agricultural University, Huhhot 010019, China
    2. National Positioning Research Station of Saihanwula Forest Ecosystem, Inner Mongolia, Chifeng 025150, China
  • Received:2019-05-21 Revised:2019-06-02 Online:2019-08-28 Published:2020-10-20
  • Contact: ZHOU Mei

摘要:

为研究内蒙古赛罕乌拉森林生态系统国家定位研究站境内不同林龄白桦林更新状况,以S1(10~15a),S2(20~30a),S3(40~45a)白桦林为研究对象,分析比较其种子雨及地表种子库差异性,探究白桦林天然更新限制因素。结果表明:1)3种林龄白桦种子雨种子密度、枯枝落叶散落量、种子雨千粒重在不同散布时期的动态高度吻合,总体表现为S1>S2>S3;2)白桦林种子雨完整数量为S1(90.48±0.08)粒>S2(88.18±0.09)粒>S3(68.74±0.07)粒;3)3种林龄白桦种子雨总量为S1(35273.00±2929.00)粒>S2(32079.00±1770.00)粒>S3(8478.00±432.00)粒,S1白桦林完整种子占比最高;4)不同林龄白桦种群种子库总量为S1(9882.00粒/m 2)>S2(8859.00粒/m 2)>S3(2539.00粒/m 2),白桦种子库室内萌发实验萌发率为S1(44.30%)>S2(40.10%)>S3(21.20%)。说明种源不是赛罕乌拉地区白桦林天然更新的主要限制因素,林龄是赛罕乌拉地区白桦林更新不均的主要因素。

关键词: 白桦, 林龄, 种子雨, 地表种子库, 更新

Abstract:

In the Inner Mongolia Saihanwula National Nature Reserve,the regeneration status of different birch forests is different,with S1(10~15a),S2(20~30a) and S3(40~45a) were the research objects.The differences of provenances and surface seed bank of three different forest ages were analyzed and compared,and the limiting factors of natural regeneration of birch forest were explored.The results showed that:(1) The seed height,litter litterand seed rain 1000-grain weight of different plant ages were consistent with the dynamic height of different distribution periods,and the overall performance was S1>S2>S3;(2)The total number of seed rain in white birch forest is S1(90.48±0.08) grain>S2(88.18±0.09) grain>S3(68.74±0.07) grain;(3)The total seed quantity of white birch forest of different forest age is S1(35273.00±2929.00) grain>S2(32079.00±1770.00) grain>S3(8478.00±432.00) grain,the highest proportion of intact seeds of S1 forest age B.bicolor;(4)The total seed bank of three different ages of white birch population is S1(9882.00/m 2)>S2(8859.00/m 2) >S3(2539.00 granules/m 2),the germination rate of indoor germination experiment of Betula chinensis seed bank was S1(44.30%)>S2(40.10%)>S3(21.20%).It is indicated that the provenance is not the main limiting factor for the natural regeneration of birch forest in Saihanwula region.The forest age is the main factor leading to the uneven renewal of birch forest in Saihanwula.

Key words: White birch, forestage, seedrain, surface seed bank, regeneration

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