植物生态学报 ›› 2015, Vol. 39 ›› Issue (7): 682-693.DOI: 10.17521/cjpe.2015.0065
所属专题: 生态化学计量
曾昭霞1,2,*(), 王克林1,2, 刘孝利3, 曾馥平1,2, 宋同清1,2, 彭晚霞1,2, 张浩1,2, 杜虎1,2
出版日期:
2015-07-01
发布日期:
2015-07-22
通讯作者:
曾昭霞
作者简介:
*作者简介:E-mail:
基金资助:
ZENG Zhao-Xia1,2,*(), WANG Ke-Lin1,2, LIU Xiao-Li3, ZENG Fu-Ping1,2, SONG Tong-Qing1,2, PENG Wan-Xia1,2, ZHANG Hao1,2, DU Hu1,2
Online:
2015-07-01
Published:
2015-07-22
Contact:
Zhao-Xia ZENG
About author:
# Co-first authors
摘要:
探明我国西南喀斯特生态脆弱区植被恢复重建背景下, 森林植物、凋落物与土壤碳(C)、氮(N)、磷(P)化学计量特征有助于深入地认识喀斯特森林生态系统养分循环规律和系统稳定机制。该文选取桂西北典型喀斯特地区域3个原生林群落和3个自然恢复28年的次生林群落, 研究其“植物-凋落物-土壤”连续体的C、N、P化学计量学特征及其内在关联。结果表明: 1)圆果化香树(Platycarya longipes)、伞花木(Eurycorymbus cavaleriei)和青檀(Pteroceltis tatarinowii)以及圆叶乌桕(Sapium rotundifolium)、八角枫(Alangium chinense)和黄荆(Vitex negundo) 6种植物的C、N、P平均含量分别为427.5、21.2、1.2 mg·g-1; 凋落物C、N、P平均含量分别为396.2、12.7、0.9 mg·g-1, 而表层土壤(0-10 cm) C、N、P平均含量分别为92.0、6.35和1.5 mg·g-1。2)原生林N再吸收率(平均值为42.7%)高于次生林(平均值为36.5%), P再吸收率(20.4%)显著低于次生林(32.3%) (p < 0.05); 6个森林群落N的再吸收率均大于P的再吸收率。3)不同群落凋落物的C:N值差异不显著, 原生林植物的C:N值小于次生林、土壤C:N显著大于次生林; 原生林土壤C:P与次生林无显著差异, 植物与凋落物C:P小于次生林; 原生林凋落物与土壤N:P值小于次生林, 植物N:P比平均值均为17.4。4)研究区典型森林群落植物中N和P含量呈显著的正相关关系, 植物C:N与N:P、C:P与N:P比值均无明显相关关系; 经过对数变换后的土壤C:N与N:P呈显著负相关关系, 凋落物的C:P与N:P值呈极显著正相关关系。研究结果可为我国西南典型喀斯特脆弱生态区的生态功能恢复与植被重建提供科学依据。
曾昭霞, 王克林, 刘孝利, 曾馥平, 宋同清, 彭晚霞, 张浩, 杜虎. 桂西北喀斯特森林植物-凋落物-土壤生态化学计量特征. 植物生态学报, 2015, 39(7): 682-693. DOI: 10.17521/cjpe.2015.0065
ZENG Zhao-Xia,WANG Ke-Lin,LIU Xiao-Li,ZENG Fu-Ping,SONG Tong-Qing,PENG Wan-Xia,ZHANG Hao,DU Hu. Stoichiometric characteristics of plants, litter and soils in karst plant communities of Northwest Guangxi. Chinese Journal of Plant Ecology, 2015, 39(7): 682-693. DOI: 10.17521/cjpe.2015.0065
建群种 Constructive species | 原生林 Primary forest | 次生林 Secondary forest | |||||
---|---|---|---|---|---|---|---|
圆果化香树 Platycarya longipes | 伞花木 Eurycorymbus cavaleriei | 青檀 Pteroceltis tatarinowii | 圆叶乌桕 Sapium rotundifolium | 八角枫 Alangium chinense | 黄荆 Vitex negundo | ||
裸岩率 Bare rock (%) | 48 | 55 | 70 | 15 | 35 | 12 | |
建群种高 (m) (平均值±标准误差) Height of constructive species (m) (mean ± SE) | 4.92 ± 0.56 | 7.67 ± 0.63 | 8.88 ± 0.71 | 4.74 ± 0.45 | 3.56 ± 0.38 | 1.86 ± 0.23 | |
郁闭度 Canopy closure | 0.55 | 0.61 | 0.48 | 0.67 | 0.82 | 0.74 | |
物种数 Species number | 13 | 17 | 9 | 38 | 33 | 42 | |
香农-威尔指数 Shannon-Winner index | 3.22 | 3.14 | 3.48 | 1.67 | 1.91 | 1.54 | |
均匀度 Evenness | 0.83 | 0.77 | 0.89 | 0.58 | 0.62 | 0.55 | |
辛普森指数 Simpson’s index | 0.81 | 0.78 | 0.95 | 0.55 | 0.64 | 0.52 |
表1 群落基本概况
Table 1 The basic characteristics of the forest communities
建群种 Constructive species | 原生林 Primary forest | 次生林 Secondary forest | |||||
---|---|---|---|---|---|---|---|
圆果化香树 Platycarya longipes | 伞花木 Eurycorymbus cavaleriei | 青檀 Pteroceltis tatarinowii | 圆叶乌桕 Sapium rotundifolium | 八角枫 Alangium chinense | 黄荆 Vitex negundo | ||
裸岩率 Bare rock (%) | 48 | 55 | 70 | 15 | 35 | 12 | |
建群种高 (m) (平均值±标准误差) Height of constructive species (m) (mean ± SE) | 4.92 ± 0.56 | 7.67 ± 0.63 | 8.88 ± 0.71 | 4.74 ± 0.45 | 3.56 ± 0.38 | 1.86 ± 0.23 | |
郁闭度 Canopy closure | 0.55 | 0.61 | 0.48 | 0.67 | 0.82 | 0.74 | |
物种数 Species number | 13 | 17 | 9 | 38 | 33 | 42 | |
香农-威尔指数 Shannon-Winner index | 3.22 | 3.14 | 3.48 | 1.67 | 1.91 | 1.54 | |
均匀度 Evenness | 0.83 | 0.77 | 0.89 | 0.58 | 0.62 | 0.55 | |
辛普森指数 Simpson’s index | 0.81 | 0.78 | 0.95 | 0.55 | 0.64 | 0.52 |
含量 Content | 项目 Item | 原生林 Primary forest | 次生林 Secondary forest | |||||
---|---|---|---|---|---|---|---|---|
圆果化香树 Platycarya longipes | 伞花木 Eurycorymbus cavaleriei | 青檀 Pteroceltis tatarinowii | 圆叶乌桕 Sapium rotundifolium | 八角枫 Alangium chinense | 黄荆 Vitex negundo | |||
碳 C (mg·g-1) | 植物 Plant | 429.3 ± 9.7aA | 438.8 ± 10.3aA | 432.3 ± 9.3aA | 422.3 ± 11.3abA | 416.6 ± 12.0bA | 425.9 ± 12.4abA | |
凋落物 Litter | 395.1 ± 8.9B | 412.9 ± 9.0A | 399.4 ± 10.5B | 392.8 ± 10.6B | 385.2 ± 11.1B | 391.5 ± 12.5B | ||
土壤 Soil | 106.4 ± 6.2abC | 112.4 ± 7.1aB | 100.0 ± 6.6bC | 83.5 ± 7.4cC | 76.9 ± 6.0cdC | 72.9 ± 5.2dC | ||
氮 N (mg·g-1) | 植物 Plant | 22.6 ± 4.4aA | 23.0 ± 4.1aA | 22.1 ± 3.7aA | 18.7 ±3.1cA | 19.9 ± 2.7bcA | 20.7 ± 2.7bA | |
凋落物 Litter | 13.1 ± 2.3B | 12.5 ± 1.8B | 13.2 ± 2.1B | 12.7 ± 2.0B | 12.1 ± 3.1B | 12.8 ± 2.4B | ||
土壤 Soil | 6.4 ± 1.2abC | 5.7 ± 0.8bC | 5.9 ± 1.1abC | 7.2 ± 1.2aC | 6.8 ± 1.0abC | 6.1 ± 1.4abC | ||
磷 P (mg·g-1) | 植物 Plant | 1.3 ± 0.4A | 1.4 ± 0.4B | 1.2 ± 0.4B | 1.1 ± 0.3 | 1.1 ± 0.4A | 1.2 ± 0.5 | |
凋落物 Litter | 1.0 ± 0.1B | 1.1 ± 0.3C | 1.0 ± 0.3C | 0.8 ± 0.2 | 0.7 ± 0.4B | 0.8 ± 0.4 | ||
土壤 Soil | 1.4 ± 0.5abA | 1.7 ± 0.6aA | 1.6 ± 0.6abA | 1.2 ± 0.4b | 1.5 ± 0.5abA | 1.3 ± 0.4b |
表2 6个群落植物、凋落物与土壤的C、N、P含量(mg·g-1) (平均值±标准误差)
Table 2 C, N and P contents in plants, litter and soil in six forest communities (mg·g-1) (mean ± SE)
含量 Content | 项目 Item | 原生林 Primary forest | 次生林 Secondary forest | |||||
---|---|---|---|---|---|---|---|---|
圆果化香树 Platycarya longipes | 伞花木 Eurycorymbus cavaleriei | 青檀 Pteroceltis tatarinowii | 圆叶乌桕 Sapium rotundifolium | 八角枫 Alangium chinense | 黄荆 Vitex negundo | |||
碳 C (mg·g-1) | 植物 Plant | 429.3 ± 9.7aA | 438.8 ± 10.3aA | 432.3 ± 9.3aA | 422.3 ± 11.3abA | 416.6 ± 12.0bA | 425.9 ± 12.4abA | |
凋落物 Litter | 395.1 ± 8.9B | 412.9 ± 9.0A | 399.4 ± 10.5B | 392.8 ± 10.6B | 385.2 ± 11.1B | 391.5 ± 12.5B | ||
土壤 Soil | 106.4 ± 6.2abC | 112.4 ± 7.1aB | 100.0 ± 6.6bC | 83.5 ± 7.4cC | 76.9 ± 6.0cdC | 72.9 ± 5.2dC | ||
氮 N (mg·g-1) | 植物 Plant | 22.6 ± 4.4aA | 23.0 ± 4.1aA | 22.1 ± 3.7aA | 18.7 ±3.1cA | 19.9 ± 2.7bcA | 20.7 ± 2.7bA | |
凋落物 Litter | 13.1 ± 2.3B | 12.5 ± 1.8B | 13.2 ± 2.1B | 12.7 ± 2.0B | 12.1 ± 3.1B | 12.8 ± 2.4B | ||
土壤 Soil | 6.4 ± 1.2abC | 5.7 ± 0.8bC | 5.9 ± 1.1abC | 7.2 ± 1.2aC | 6.8 ± 1.0abC | 6.1 ± 1.4abC | ||
磷 P (mg·g-1) | 植物 Plant | 1.3 ± 0.4A | 1.4 ± 0.4B | 1.2 ± 0.4B | 1.1 ± 0.3 | 1.1 ± 0.4A | 1.2 ± 0.5 | |
凋落物 Litter | 1.0 ± 0.1B | 1.1 ± 0.3C | 1.0 ± 0.3C | 0.8 ± 0.2 | 0.7 ± 0.4B | 0.8 ± 0.4 | ||
土壤 Soil | 1.4 ± 0.5abA | 1.7 ± 0.6aA | 1.6 ± 0.6abA | 1.2 ± 0.4b | 1.5 ± 0.5abA | 1.3 ± 0.4b |
图1 不同林地植物N、P养分再吸收率(平均值±标准误差)。不同大写字母表示群落间N再吸收率差异显著。不同小写字母表示群落间P再吸收率差异显著。*表示同群落N、P再吸收率间差异显著(p < 0.05)。AH, 八角枫; EH, 伞花木; PM, 青檀; PW, 圆果化香树; SH, 圆叶乌桕; VL, 黄荆。
Fig. 1 The N and P resorption rates of plants in different forest communities. Different capital letters indicate significant differences in N resorption rate between community types (mean ± SE). Different lowercase letters indicate significant differences in P resorption rate between community types. * shows significant difference between the N and P resorption rates (p < 0.05). AH, Alangium chinense; EH, Eurycorymbus cavaleriei; PM, Pteroceltis tatarinowii; PW, Platycarya longipes; SH, Sapium rotundifolium; VL, Vitex negundo.
图2 不同林地植物、凋落物与土壤的C:N、C:P、N:P (平均值±标准误差)。同系列不同字母表示群落间差异显著(p < 0.05)。AH, 八角枫; EH, 伞花木; PM, 青檀; PW, 圆果化香树; SH, 圆叶乌桕; VL, 黄荆。
Fig. 2 The values of C:N, C:P, N:P in plants, litter and soil in different forest communities (mean ± SE). Different letters indicate significant differences between community types (p < 0.05). AH, Alangium chinense; EH, Eurycorymbus caval- eriei; PM, Pteroceltis tatarinowii; PW, Platycarya longipes; SH, Sapium rotundifolium; VL, Vitex negundo.
对象 Item | 研究区域 Region | C (mg·g-1) | N (mg·g-1) | P (mg·g-1) | C:N | C:P | N:P | 文献 References |
---|---|---|---|---|---|---|---|---|
植物 Plant | 广西喀斯特地区 Karst region, Guangxi | 427.5 | 21.2 | 1.2 | 19.8 | 356 | 18 | This study |
北京及其周边 Beijing and it’s periphery | 451.0 | 26.1 | 2.0 | 17.4 | 226 | 13 | Han et al., 2009 | |
吉林长白山 Changbaishan, Jilin | 481.5 | 19.5 | 1.5 | 24.7 | 321 | 13 | 王晶苑等, 2011 Wang et al., 2011 | |
广东鼎湖山 Dinghushan, Guangdong | 504.9 | 19.8 | 0.9 | 25.5 | 561 | 22 | 王晶苑等, 2011 Wang et al., 2011 | |
中国 China | - | 18.6 | 1.2 | - | - | 16 | Han et al., 2005 | |
凋落物 Litter | 广西喀斯特地区 Karst region, Guangxi | 396.2 | 12.7 | 0.9 | 31.4 | 440 | 14 | This study |
北京东灵山 Donglingshan, Beijing | 447.3 | 8.0 | 0.4 | 55.9 | 1 118 | 20 | Wang & Huang, 2001 | |
吉林长白山 Changbaishan, Jilin | 496.8 | 12.9 | 0.9 | 39.4 | 552 | 14 | 王晶苑等, 2011 Wang et al., 2011 | |
广东鼎湖山 Dinghushan, Guangdong | 522.1 | 14.2 | 0.4 | 37.3 | 1 305 | 35 | 王晶苑等, 2011 Wang et al., 2011 | |
全球 Global | - | 10.9 | 0.9 | - | - | 12 | Kang et al., 2010 | |
土壤 Soil | 广西喀斯特地区 Karst region, Guangxi (0-10 cm) | 92.0 | 6.4 | 1.5 | 15.3 | 61 | 4 | This study |
广西喀斯特地区 Karst region, Guangxi (0-20 cm) | 48.4 | 5.4 | 0.5 | 8.8 | 97 | 11 | Yu et al., 2014 | |
内蒙古草原 Steppe in Inner Mongolia (0-10 cm) | 25.3 | 1.7 | 0.1 | 14.9 | 253 | 17 | Yin et al., 2010 | |
闽江河口湿地 Wetlands in Minjiang river estuary (0-15 cm) | 18.8 | 2.1 | 0.8 | 8.9 | 24 | 3 | 王维奇等, 2011 Wang et al., 2011 | |
甘肃民勤绿洲 Minqin oasis, Gansu (0-20 cm) | 3.0 | 0.3 | 0.3 | 10.0 | 10 | 1 | Yang et al., 2011 |
表3 广西喀斯特森林与其他研究区域植物、凋落物、土壤C、N、P含量*
Table 3 The contents of C, N, P in plants, litter and soil in Guangxi karst forest communities in comparison with forests of other regions
对象 Item | 研究区域 Region | C (mg·g-1) | N (mg·g-1) | P (mg·g-1) | C:N | C:P | N:P | 文献 References |
---|---|---|---|---|---|---|---|---|
植物 Plant | 广西喀斯特地区 Karst region, Guangxi | 427.5 | 21.2 | 1.2 | 19.8 | 356 | 18 | This study |
北京及其周边 Beijing and it’s periphery | 451.0 | 26.1 | 2.0 | 17.4 | 226 | 13 | Han et al., 2009 | |
吉林长白山 Changbaishan, Jilin | 481.5 | 19.5 | 1.5 | 24.7 | 321 | 13 | 王晶苑等, 2011 Wang et al., 2011 | |
广东鼎湖山 Dinghushan, Guangdong | 504.9 | 19.8 | 0.9 | 25.5 | 561 | 22 | 王晶苑等, 2011 Wang et al., 2011 | |
中国 China | - | 18.6 | 1.2 | - | - | 16 | Han et al., 2005 | |
凋落物 Litter | 广西喀斯特地区 Karst region, Guangxi | 396.2 | 12.7 | 0.9 | 31.4 | 440 | 14 | This study |
北京东灵山 Donglingshan, Beijing | 447.3 | 8.0 | 0.4 | 55.9 | 1 118 | 20 | Wang & Huang, 2001 | |
吉林长白山 Changbaishan, Jilin | 496.8 | 12.9 | 0.9 | 39.4 | 552 | 14 | 王晶苑等, 2011 Wang et al., 2011 | |
广东鼎湖山 Dinghushan, Guangdong | 522.1 | 14.2 | 0.4 | 37.3 | 1 305 | 35 | 王晶苑等, 2011 Wang et al., 2011 | |
全球 Global | - | 10.9 | 0.9 | - | - | 12 | Kang et al., 2010 | |
土壤 Soil | 广西喀斯特地区 Karst region, Guangxi (0-10 cm) | 92.0 | 6.4 | 1.5 | 15.3 | 61 | 4 | This study |
广西喀斯特地区 Karst region, Guangxi (0-20 cm) | 48.4 | 5.4 | 0.5 | 8.8 | 97 | 11 | Yu et al., 2014 | |
内蒙古草原 Steppe in Inner Mongolia (0-10 cm) | 25.3 | 1.7 | 0.1 | 14.9 | 253 | 17 | Yin et al., 2010 | |
闽江河口湿地 Wetlands in Minjiang river estuary (0-15 cm) | 18.8 | 2.1 | 0.8 | 8.9 | 24 | 3 | 王维奇等, 2011 Wang et al., 2011 | |
甘肃民勤绿洲 Minqin oasis, Gansu (0-20 cm) | 3.0 | 0.3 | 0.3 | 10.0 | 10 | 1 | Yang et al., 2011 |
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