天山森林凋落物和枯枝落时层的研究
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* 新疆维吾尔自治区自然科学基金


A STUDY ON LITTER AND FOREST FLOOR IN TIANSHAN MOUNTAINS
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    摘要:

    通过1992-1995年的定位试验,对天山森林凋落物和枯枝落叶层的主要性质进行了研究。结果表明,天山森林生态系统中养分运转具有其独特性:(1)森林年凋落量较低,为2.1t/hm2,凋落物的季节动态变化呈单峰型;(2)以凋落物形式的养分年归还量为Ca>N>K>P。在凋落之前,大部分N、P、K被转移,K的转移量最大,而Ca则相对富集,归还量最大;(3)枯枝落叶层中养分贮量和蓄水量高,但有机物质分解率较低;(4)枯枝落叶层的养分淋失量以全K最大,其次为有机质、全N、全P。

    Abstract:

    The main properties of litter and forest floor in Tianshan mountains were determined in a location test during 1992-1995. The results showed that the movement of nutrients in Tianshan forest ecosystem had its special circumstances: (1) Forest litterfall was lower (2.1 t/hm2) and its seasonal changes belonged to the single-peak type. (2) The sequence of nutrients returned in form of litter was Ca>N>K>P. Before falling, most of N, P, K was transfered, and the transfered amount of K was the greatest However, Ca was rich in litter, and it had the greatest amount of return. (3) The nutrient reserves and water storage capacity of forest floor were higher, but the rate of decomposition of organic matter was lower. (4) The sequence of leaching loss from forest floor was K>organic C>total N>total P.

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李叙勇,孙继坤,常直海,郝瑶琴,陈冰,蒋平安.天山森林凋落物和枯枝落时层的研究[J].土壤学报,1997,34(4):406-417. Li Xuyong, Sun Jikun, Chang Zhihai, Hao Yaoqin, Chen Bing, Jiang Ping'an. A STUDY ON LITTER AND FOREST FLOOR IN TIANSHAN MOUNTAINS[J]. Acta Pedologica Sinica,1997,34(4):406-417.

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  • 收稿日期:1996-04-26
  • 最后修改日期:1997-05-19
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  • 在线发布日期: 2013-02-25
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