| 摘要: |
| 香根草(Vetiveria zizanioides)是一种良好的矿业废弃地生态修复物种,研究其生物量分配和异速生长关系,有助于深入了解香根草在矿区的生存策略与生态功能。该研究以贵州省六盘水市大河煤矿煤矸石山种植年限为4、5、8和15 a的香根草为对象,采用挖掘法和称重法对不同种植年限香根草的器官生物量、分配比例及异速生长关系进行了对比分析。结果表明:(1)随种植年限的增加,根、茎、叶生物量均呈现先增加后减少的趋势,且均在种植年限为5 a时最大,15 a时最小。(2)茎生物量分配比在种植年限15 a时最大(37.3%),叶生物量分配比在种植年限5 a时最大(36.1%),根生物量分配比不随种植年限的增加而发生变化,基本保持在30%左右。(3)种植年限为4、5、8 a时,地上部总生物量与根生物量、叶生物量呈异速生长关系; 种植年限为5 a时,叶面积与根、叶生物量呈异速生长关系,与茎生物量呈等速生长关系。不同种植年限间的生物量分配及异速生长关系虽然没有一致规律,但体现了香根草在煤矸石基质中生物量分配的特点,且显示了其特别的生长方式和资源分配策略,为今后香根草在煤矸石山生态治理方面提供了参考依据。 |
| 关键词: 香根草, 煤矸石山, 种植年限, 生物量分配, 异速生长 |
| DOI：10.11931/guihaia.gxzw201901023 |
| 分类号:Q945.3 |
| 文章编号:1000-3142(2020)06-0802-10 |
| Fund project:国家自然科学基金(31500451); 贵州省科学技术基金(J [2014]2055); 贵州省科技合作计划项目(LH [2015]7667); 贵州省教育厅自然科学研究项目(KY [2014]303)[Supported by the National Natural Science Foundation of China(31500451); Science and Technology Fund of Guizhou(J [2014]2055); Guizhou Science and Technology Cooperation Program(LH [2015]7667); Guizhou Provincial Department of Education Natural Science Research Program(KY [2014]303)]。 |
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| Biomass allocation and allometric analysis of Vetiveria zizanioides in different planting years on coal spoil-heaps |
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MAO Yuanyuan1, HAO Jun1, LONG Shuiyi1, XU Zhongdan1,
SHENG Meiqun 1, Cheng Wei1,2*
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1. College of Animal Science, Guizhou University, Guiyang 550025, China;2. Key Laboratory of Plant Resources
Conservation and Germplasm Innovation in Mountainous Region, Guiyang 550025, China
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| Abstract: |
| Vetiveria zizanioides is a good ecological restoration species in mining wasteland. The study on relationship between biomass allocation and allometry will contribute to deepen understanding the survival strategy and ecological function of V. zizanioides in mining area. V. zizanioides planted on coal spoil-heaps of Dahe Coal Mine in Liupanshui City of Guizhou Province for 4, 5, 8, 15 a were used as research objects, the total biomass were obtained by using excavation and weight methods, and organ biomass, allocation ratios and the allometric relationships among the four different planting years were compared. The results were as follows:(1)The biomasses of roots, stems and leaves increased firstly and then decreased with the increase of planting years, and reached the maximum at 5 a of planting and the minimum at 15 a of planting.(2)Stem peaked in biomass distribution ratio in the 15 a of planting(37.3%), while leaf did in the 5 years of planting(36.1%), and the root did not change with the increase of planting years(30%).(3)In planting for 4, 5, 8 a, the total biomass of aboveground biomass was in allometric relationships with root and leaf biomasses. In planting for 5 a, the leaf area was in allometric relationships with root and leaf biomasses, and was in isometric growth relationship with stem biomass. There was no consistency between allocation pattern and allometric relationship in different planting years, but it reflected the characteristics of V. zizanioides biomass allocation on showed its special growth, and would provide theretical reference for ecological management of V. zizanioides on coal spoil-heaps. |
| Key words: Vetiveria zizanioides, coal spoil-heaps, planting years, biomass allocation, allometric |
