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根据11a的野外实验对内蒙古羊草草原群落42种植物的能量含量(含灰分)及其在群落中的相对生物量进行了研究。不同植物种地上部分的能量含量在(13156±1141) J/g和(18141±527) J/g之间变动,所有物种的平均能量含量为(16899±840)J/g,种间变异系数4.9%。小叶锦鸡儿具有最高的能量含量。禾草的平均能量含量高于杂草。根据生活型和生长型,草本物种被进一步分组,能量含量从高到低的排列顺序为:高禾草(17717±92) J/g >豆科植物(17228±433) J/g >矮禾草(17250±218) J/g >其余杂草(16784±529) J/g >半灌木(16719±69) J/g >1、2年生植物(15911±1759) J/g。42种植物的能量含量和它们在群落中的相对生物量存在显著正相关关系。根据它们在群落中的构成比例进行分组,以物种在群落中的相对生物量为权重,各组能量含量依次为:优势种(17740 J/g) >伴生种(17244 J/g-1) >偶见种(16653 J/g)。高能量含量的植物更具竞争力,在群落中通常占据优势地位,而低能量含量的植物竞争力通常较弱,构成草原群落的伴生种或偶见种。
Based on the field experiments of 11a, the energy contents (ash content) and the relative biomass in 42 species of Leymus chinensis grassland community in Inner Mongolia were studied. The energy contents of the upper part of different plant species varied between (13156 ± 1141) J / g and (18141 ± 527) J / g, the average energy content of all species was (16899 ± 840) J / g, 4.9%. Caragana microphylla has the highest energy content. Grass average energy content than weeds. According to the type of life and growth type, the herbaceous species were further grouped and the order of energy content from high to low was as follows: tall grass (17717 ± 92) J / g> legume (17228 ± 433) J / g> Grass (17250 ± 218) J / g> the rest of weeds (16784 ± 529) J / g> semi shrubs (16719 ± 69) J / g> 1, 2 year old plants (15911 ± 1759) J / g. There was a significant positive correlation between the energy content of 42 species and their relative biomass in the community. According to the proportion of their species in the community, the relative biomass of the species in the community is weighted as follows: dominant species (17740 J / g)> associated species (17244 J / g -1)> Occasional species (16,653 J / g). Plants with high energy content are more competitive and usually dominate in the community, whereas plants with low energy content are often less competitive and constitute associated or occasionally species of grassland communities.