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[1]宋思梦 谭 波,周 扬 张 健,** 李 艳 姚小兰 李相君 李亚洲 陈 凯 李柏翰.林窗大小对马尾松人工林更新植物生态化学计量特征的影响[J].应用与环境生物学报,2016,22(06):1040-1047.[doi:10.3724/SP.J.1145.2016.01042]
 SONG Simeng,TAN Bo,ZHOU Yang,et al.Effects of forest gap size on ecological stoichiometric characteristics of update plants in Pinus massoniana plantation[J].Chinese Journal of Applied & Environmental Biology,2016,22(06):1040-1047.[doi:10.3724/SP.J.1145.2016.01042]
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林窗大小对马尾松人工林更新植物生态化学计量特征的影响()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
22卷
期数:
2016年06期
页码:
1040-1047
栏目:
“生态系统的格局与恢复”专栏论文
出版日期:
2016-12-25

文章信息/Info

Title:
Effects of forest gap size on ecological stoichiometric characteristics of update plants in Pinus massoniana plantation
作者:
宋思梦1 谭 波1 2 周 扬1 张 健1 2** 李 艳1 姚小兰1 李相君1 李亚洲1 陈 凯1 李柏翰1
1四川农业大学生态林业研究所,华西雨屏区生态环境监测站 成都 611130 2四川省长江上游生态安全协同创新中心 成都 611130
Author(s):
SONG Simeng1 TAN Bo1 2 ZHOU Yang1 ZHANG Jian1 2** LI Yan1 YAO Xiaolan1 LI Xiangjun1 LI Yazhou1 CHEN Kai1 & LI Bohan1
1Monitoring Station for Eco-environments in the Rainy Zone of Southwest China, Institute of Ecology & Forestry, Sichuan Agriculture University, Chengdu 611130, China 2Collaborative Innovation Center of Ecological Security in the Upper Reaches of Yangtze River, Chengdu 611130, China
关键词:
林窗大小马尾松人工林生态化学计量特征更新植物养分利用率
Keywords:
gap size Pinus massoniana plantation ecological stoichiometric characteristics update plant nutrient utilization
分类号:
S713 : S718.55
DOI:
10.3724/SP.J.1145.2016.01042
摘要:
为了解林窗大小对马尾松人工林林窗下更新过程中优势植物生态化学计量特征的影响,在长江上游低山丘陵区选取7种面积不等(100 m2、225 m2、400 m2、625 m2、900 m2、1 225 m2、1 600 m2)的人为采伐形成的林窗,以林下为对照,分析更新优势植物油樟、芒萁、芒和皱叶狗尾草叶片化学计量特征. 结果表明:4种植物化学计量特征对林窗大小响应不同,在各自林窗梯度中均有显著差异. 4种植物C : N为17.0-37.7,C : P为152.5-748.0,N : P为6.4-21.5. 随林窗面积增大,油樟、芒和皱叶狗尾草C : N均先升后降,C : P和N : P先降后升,芒萁变化不明显. 油樟C、N、P元素分配最佳的林窗为625 m2,芒萁为1 225 m2,芒和皱叶狗尾草为1 600 m2. 4种植物在多数林窗中不受N、P限制,但900 m2林窗中油樟和芒萁均处于缺P状态,400 m2林窗中芒和皱叶狗尾草均受N限制. 综上,更新油樟树种采用625 m2林窗表现出较理想的效果,芒萁、芒和皱叶狗尾草的自然更新则在大面积林窗(1 225-1 600 m2)中效果更好. (图4 表3 参36)
Abstract:
Plant ecological stoichiometry is an important way to investigate the material cycling and energy flow between plants and the environment, which can be modulated during forest regeneration by artificial factors such as forest gap. This study aimed to understand the effects of artificial forest gap of different sizes on the ecological stoichiometry of update dominant plants in Pinus Massoniana plantation. The ecological stoichiometric characteristics of four dominant update species (Cinnamomum longepaniculatum, Dicranopteris dichotoma, Miscanthus sinensis and Setaria plicata) were observed in seven gaps (G1: 100 m2; G2: 225 m2; G3: 400 m2; G4: 625 m2; G5: 900 m2; G6: 1 225 m2; G7: 1 600 m2; closed canopy as the control) in a 39-year-old masson pine (P. Massoniana) plantation in the upper reaches of the Yangtze River. The results showed significant effects of the forest gap size on the ecological stoichiometry in all four species but with different patterns. The ratios of C : N, C : P and N : P for the tested species ranged from 17.0 to 37.7, 152.5 to 748.0, 6.4 to 21.5, respectively. With the increase of the area of forest gap, the C : N ratio in C. longepaniculatum, M. sinensis and S. plicata first increased and then decreased, but the C : P and N : P ratios first declined and then rose. The ecological stoichiometry of D. dichotoma did not vary significantly with the forest gap. The best forest gap allocation of carbon, nitrogen and phosphorus was 625 m2 for C. longepaniculatum, 1 225 m2 for D. dichotoma, and 1 600 m2 for M. sinensis and S. plicata. The growth of the four dominant update plants was not limited by nitrogen or phosphorus in most of the forest gaps, whereas C. longepaniculatum and D. dichotoma were limited by nitrogen in the 900 m2 forest gap, and M. sinensis and S. plicata restricted by phosphorus in the 400 m2 forest gap. The results indicated that forest gap of 625 m2 is suitable for C. longepaniculatum, whereas D. dichotoma, M. sinensis and S. plicata need larger forest gap, i.e., 1 225-1 600 m2.

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更新日期/Last Update: 2016-12-30