姜生秀,赵鹏.河西走廊东段不同生境对沙米形态结构及生物量分配的影响[J].干旱地区农业研究,2023,(3):248~256
河西走廊东段不同生境对沙米形态结构及生物量分配的影响
Morphological structure and biomass allocation of Agriophyllum squarrosum in different habitats of east section of Hexi Corridor
  
DOI:10.7606/j.issn.1000-7601.2023.03.31
中文关键词:  沙米  环境因子  形态特征  生物量  河西走廊
英文关键词:A. squarrosum  environmental factors  morphological character  biomass  Hexi Corridor
基金项目:甘肃省青年科技基金计划项目(20JR5RA091)
作者单位
姜生秀 甘肃省治沙研究所甘肃省荒漠化与风沙灾害防治国家重点实验室(培育基地)甘肃 兰州 730070 
赵鹏 甘肃省治沙研究所甘肃省荒漠化与风沙灾害防治国家重点实验室(培育基地)甘肃 兰州 730070 
摘要点击次数: 322
全文下载次数: 266
中文摘要:
      为揭示荒漠地区1 a生植物对环境变化的响应机制及适应策略,于2020年以甘肃民勤县、武威市和古浪县生境的沙米为对象,对其形态结构、生物量分配及与环境因子的相关性进行了研究,结果表明:(1)古浪县年均气温、年均日照时数和土壤日均温度均最低,分别为6.81℃、2 669 h和16.22℃,武威市均最高,分别为8.58℃、2 873.4 h和22.94℃;古浪县土壤含水量、土壤粉粒和土壤速效磷均最高,分别为4.53%、17.51%和6.81 g·kg-1,民勤县均最小,分别为1.46%、7.19%和5.55 g·kg-1;古浪县沙米株高、冠幅及根长均最高,分别为70.63、54.24 cm和96.15 cm,民勤县均最小,分别为62.40、46.77 cm和86.31 cm。(2)古浪县沙米根生物量和质量分数及根冠比均最高,分别为7.56 g、15.98%和0.291;不同生境根-茎、根-叶、根-花、叶-茎、花-茎和花-叶生物量均是α<1的异速生长关系。(3)3个生境中,株高和根、茎、叶、花生物量均呈显著或极显著正相关,与根冠比呈显著或极显著负相关;根生物量、根冠比与年均气温、土壤日均温度呈极显著负相关,与土壤有机质、全氮、含水量、粉粒呈显著或极显著正相关;年均日照时数、年太阳总辐射和叶、花生物量之间呈显著或极显著负相关。由此说明,古浪县生境土壤含水量和肥力较好,沙米生长良好。沙米的形态特征与个体生物量间协同变化,沙米地下生物量积累速率大于地上生物量,生殖器官大于营养器官。
英文摘要:
      To reveal the response mechanism and adaptation strategies of annual plants to environmental change in desert areas, the morphological structure, biomass allocation and its correlation with environmental factors of A. squarrosum in Minqin, Wuwei and Gulang were studied. The results showed that (1) The average annual temperature, sunshine duration and soil average daily temperature in Gulang were the lowest, which were 6.81℃, 2 669 h and 16.22℃, respectively, while Wuwei was the highest, which were 8.58℃, 2 873.4 h and 22.94℃, respectively. Soil water content, soil silt and soil available phosphorus in Gulang were the highest, which were 4.53%, 17.51% and 6.81 g·kg-1, respectively, while Minqin was the lowest, which were 1.46%, 7.19% and 5.55 g·kg-1, respectively. Gulang had the highest plant height, crown width and root length which were 70.63 cm, 54.24 cm and 96.15 cm, respectively, while Minqin were the lowest, which were 62.40 cm, 46.77 cm and 86.31 cm, respectively. (2) The biomass, mass fraction and root\|shoot ratio of Gulang were the highest, which were 7.56g、15.98% and 0.291. The biomass of root\|stem, root\|leaf, root\|flower, leaf\|stem, flower\|stem and flower\|leaf showed allometric relationships with α<1 in different habitats. (3) Plant height was significantly positively correlated with root, stem, leaf and flower biomass, and significantly negatively correlated with root\|shoot ratio in the three habitats. The root biomass and root shoot ratio were negatively correlated with average annual temperature and soil average daily temperature, and positively correlated with soil organic matter, total nitrogen, water content and silt. There were significant or extremely significant negative correlations between annual sunshine duration, annual total solar radiation and leaf and flower biomass. Therefore, the soil moisture content and fertility of Gulang habitat was better, and the growth of A. squarrosum was better. The morphological characteristics of A. squarrosum showed a trend of synergetic change with individual biomass. The accumulation rate of underground biomass was higher than that of aboveground biomass, and that of reproductive organs were higher than that of vegetative organs.
查看全文  查看/发表评论  下载PDF阅读器