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Forest and Grassland Resources Research >

2019 , Vol. 0 >Issue 4: 74 - 79

DOI: https://doi.org/10.13466/j.cnki.lyzygl.2019.04.011

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

  • Qianqian FENG ,
  • Mei ZHOU ,
  • Pengwu ZHAO ,
  • Yiheng WU
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  • 1. Inner Mongolia Agricultural University, Huhhot 010019, China
    2. National Positioning Research Station of Saihanwula Forest Ecosystem, Inner Mongolia, Chifeng 025150, China

Received date: 2019-05-21

  Revised date: 2019-06-02

  Online published: 2020-10-20

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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

Cite this article

Qianqian FENG , Mei ZHOU , Pengwu ZHAO , Yiheng WU . Study on Seed Rain and Surface Seed Bank of Betula platyphylla in Different Ages in the Southern Daxing'anling Mountains[J]. Forest and Grassland Resources Research, 2019 , 0(4) : 74 -79 . DOI: 10.13466/j.cnki.lyzygl.2019.04.011

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