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研究了芦芽山自然保护区亚高山草甸带鬼箭锦鸡儿(Caraganajubata)灌丛营养成分季节性变化和土壤养分分布规律.结果表明,鬼箭锦鸡儿具有很高的营养价值,粗蛋白含量达20·27%,粗纤维含量33·83%,灰分5·12%,同时含有丰富的Ca、Fe、Mn等中微量元素,是亚高山草场家畜的优质饲料来源.鬼箭锦鸡儿营养成分呈明显的季节性变化规律:从5月开始,随着灌丛生长发育,体内粗蛋白、灰分和矿质元素含量呈上升趋势,7月(开花期)达到最高,然后逐步降低.为适应海拔高、气温低、土层薄的亚高山草甸带生境,鬼箭锦鸡儿灌丛周围的土壤养分向灌丛中心聚集,灌丛中心的土壤电导率、有机质、全氮、速效磷和有效钾分别较灌丛边缘高18·8%、16·4%、18·7%、16·6%和8·4%,形成了明显的“肥岛效应”.鬼箭锦鸡儿灌丛根际土壤有机质、全氮出现富集,有效磷、速效钾和速效铁、锰在根际周围出现明显亏缺,表明鬼箭锦鸡儿具有高效固氮和吸收利用土壤养分的能力.
The seasonal changes of nutrition composition and soil nutrient distribution in Caragana juniper shrub in subalpine meadow zone of Luya Mountain Nature Reserve were studied.The results showed that Caragana microphylla had high nutritional value and crude protein content Up to 20.27%, the crude fiber content is 33.83% and the ash content is 5.12%, and is also rich in Ca, Fe, Mn and other trace elements, which is a good feed source for livestock in subalpine grassland. The results showed that the content of crude protein, ash and mineral elements showed an upward trend from the beginning of May to the highest in July (flowering stage) and then gradually decreased in order to adapt to the high altitude , Low temperature and thin layer of subalpine meadow habitat, soil nutrient around Caragana korshinskii shrubs gathered to the shrub center, soil conductivity, organic matter, total nitrogen, available phosphorus and available potassium Which was 18.8%, 16.4%, 18.7%, 16.6% and 8.4% more than the edge of the shrubs, forming a significant “fertilizer island effect.” Soil organic matter, total nitrogen appeared enrichment, available phosphorus, available potassium and available iron, manganese around the rhizosphere Significant deficit, indicating Euonymus Caragana children have the ability to effectively absorb nitrogen fixation and the use of soil nutrients.