坡向对天山北坡山地草原群落特征的影响

发布时间：2018-06-03 05:44

  本文选题：坡向 + 群落特征　； 参考：《新疆农业科学》2017年06期

【摘要】：【目的】研究坡向对山地草原群落特征的影响,揭示植物群落在生长季不同时期的变化规律。【方法】以新疆天山北坡山地草原为对象,采用野外取样的方法,测定不同坡向(东坡、坡顶和西坡)、不同生长季时期(6~9月)草地群落特征。【结果】(1)冷蒿重要值在6~9月整体上表现出坡顶东坡西坡;针茅重要值在坡顶和西坡显著高于东坡的67.1%~673.7%(P0.05),短柱苔草的重要值在6~7月表现出东坡≥西坡坡顶。(2)在6月、8月、9月,东坡群落盖度比坡顶、西坡显著高了21.4%~36.1%(P0.05),8~9月东坡群落密度显著高于西坡,7月的群落地上生物量在东坡显著高于西坡。【结论】坡向和生长季时期对天山北坡山地草原的群落特征产生较大的影响。
[Abstract]:[objective] to study the influence of slope direction on the characteristics of mountain grassland community, and to reveal the variation law of plant community in different periods of growing season. [methods] taking the mountainous grassland on the northern slope of Tianshan Mountain in Xinjiang as an object, the field sampling method was used. The grassland community characteristics of different slope directions (east slope, top slope and west slope, different growing season period from June to September) were measured. [results] 1) the important value of Artemisia frigida showed the west slope of east slope from June to September. The important value of Stipa on the top and west slope was significantly higher than that on the east slope (P 0.05), and the important value of Carex spp showed that the east slope was 鈮，

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