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OALib Journal期刊
ISSN: 2333-9721
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长白落叶松人工林细根生物量及其动态研究
DOI: 10.3969/j.issn.1000-2006.2014.02.034, PP. 175-180
Keywords: 长白落叶松人工林,细根生物量,细根分解,细根周转
Abstract:
以长白山区30年生长白落叶松(larixolgensis)人工林为研究对象,通过根钻连续取样及分解袋埋藏法,对细根(≤2mm)生物量及季节动态、细根分解、细根周转进行了研究。结果表明:在长白落叶松人工林生长季,细根平均生物量为3.8257t/hm2,其中活细根和死细根分别占84.51%和15.49%;0～10cm土层活、死细根生物量分别占林地活、死细根总量的72.09%和50.46%;细根生物量随土层深度的增加而减少。长白落叶松人工林细根生物量在1年中有明显的季节变化规律,活细根的呈双峰型,死细根的呈多峰型。经细根分解实验计算,长白落叶松人工林细根分解系数k平均为0.0015,细根年生长量、年分解量和年周转率分别为1.5348t/hm2、0.1450t/hm2和0.47次/a。
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