植物生态学报 ›› 2015, Vol. 39 ›› Issue (11): 1071-1081.DOI: 10.17521/cjpe.2015.0104
陈云玉, 熊德成, 黄锦学, 王韦韦, 胡双成, 邓飞, 许辰森, 冯建新, 史顺增, 钟波元, 陈光水*()
收稿日期:
2015-06-20
接受日期:
2015-09-30
出版日期:
2015-11-01
发布日期:
2015-12-02
通讯作者:
陈光水
作者简介:
# 共同第一作者
CHEN Yun-Yu, XIONG De-Cheng, HUANG Jin-Xue, WANG Wei-Wei, HU Shuang-Cheng, DENG Fei, XU Chen-Sen, FENG Jian-Xin, SHI Shun-Zeng, ZHONG Bo-Yuan, CHEN Guang-Shui*()
Received:
2015-06-20
Accepted:
2015-09-30
Online:
2015-11-01
Published:
2015-12-02
Contact:
Guang-Shui CHEN
About author:
# Co-first authors
摘要:
对不同演替阶段的树种细根生产动态及其对环境因子响应的差异目前仍缺乏了解。为此, 在福建省三明市选择了中亚热带演替前期的马尾松(Pinus massoniana)和演替后期的米槠(Castanopsis carlesii)两种人工林为研究对象, 采用微根管法对两种人工林的细根根长生产量及其动态进行了为期2年的观测, 并分析了细根生产量的径级和土层分布, 及月生产量动态与气温、降水、土壤温度、土壤含水率等环境因子间的关系。结果表明: 1)两种林分的细根生产量有显著差异, 马尾松人工林细根年根长生产量约为米槠人工林细根年根长生产量的4倍; 两种林分的细根生产量呈现显著的月变化, 峰值均出现在夏季, 且2年内总细根生产量以夏季的细根生产量最大。2)两林分均是直径0-0.3 mm的细根所占细根生产量比例最大; 土层分布上, 马尾松人工林0-10 cm土层细根所占生产量的比例最大, 米槠人工林30-40 cm土层细根所占生产量比例最大。3)偏相关分析表明, 两林分细根月生产量均与气温、土壤温度极显著相关或显著正偏相关, 与降水、土壤含水率的偏相关均不显著; 一元线性回归分析表明, 演替早期马尾松人工林细根月生产量与气温、土壤温度的相关性明显高于米槠人工林。该研究表明, 与演替后期的米槠人工林相比, 中亚热带演替早期的马尾松人工林细根生产量大, 且与温度间的相关性更高。
陈云玉, 熊德成, 黄锦学, 王韦韦, 胡双成, 邓飞, 许辰森, 冯建新, 史顺增, 钟波元, 陈光水. 中亚热带不同演替阶段的马尾松和米槠人工林的细根生产量研究. 植物生态学报, 2015, 39(11): 1071-1081. DOI: 10.17521/cjpe.2015.0104
CHEN Yun-Yu,XIONG De-Cheng,HUANG Jin-Xue,WANG Wei-Wei,HU Shuang-Cheng,DENG Fei,XU Chen-Sen,FENG Jian-Xin,SHI Shun-Zeng,ZHONG Bo-Yuan,CHEN Guang-Shui. Fine root production of Pinus massoniana plantation and Castanopsis carlesii plantation at different successional stages in subtropical China. Chinese Journal of Plant Ecology, 2015, 39(11): 1071-1081. DOI: 10.17521/cjpe.2015.0104
变异来源 Source of variation | III型平方和 III type sum of square | 自由度 Degree of freedom | 均方 Mean square | 组内组间误差 Within- and between-group error | 差异显著性的检验值 Significance |
---|---|---|---|---|---|
月份 Month | 0.826 | 23 | 0.036 | 4.093 | < 0.001 |
月份×林分 Month×Stand | 0.444 | 23 | 0.019 | 2.202 | 0.004 |
林分 Stand | 1.244 | 1 | 1.244 | 31.573 | 0.005 |
表1 马尾松和米槠人工林细根根长生产量差异的重复测量方差分析结果
Table 1 Repeated measures ANOVA on difference of monthly fine root length production in Pinus massoniana and Castanopsis carlesii plantations
变异来源 Source of variation | III型平方和 III type sum of square | 自由度 Degree of freedom | 均方 Mean square | 组内组间误差 Within- and between-group error | 差异显著性的检验值 Significance |
---|---|---|---|---|---|
月份 Month | 0.826 | 23 | 0.036 | 4.093 | < 0.001 |
月份×林分 Month×Stand | 0.444 | 23 | 0.019 | 2.202 | 0.004 |
林分 Stand | 1.244 | 1 | 1.244 | 31.573 | 0.005 |
图1 马尾松及米槠人工林2013年1月至2014年12月的细根月根长生产量动态及各月所占当年总生产量的百分比(平均值±标准误差)。
Fig. 1 Monthly fine root production and proportion of Pinus massoniana and Castanopsis carlesii plantation from January 2013 to December 2014 (mean ± SE).
图2 马尾松及米槠人工林2013-2014年细根的季节生产量(平均值±标准误差)。
Fig. 2 Seasonal distribution of total fine root production in Pinus massoniana and Castanopsis carlesii plantations during the two-year experiment period (mean ± SE).
图3 试验地2013年1月至2014年12月的月平均气温、降水量及土壤温度、土壤含水率分布图。A, 试验地月平均气温(◇)和马尾松人工林(●)和米槠人工林(○)的土壤温度。B, 试验地月降水量(□)和马尾松人工林(●)和米槠人工林(○)的土壤含水率。
Fig. 3 Monthly mean air temperature, rainfall, soil temperature and soil water content of the experimental sites from January 2013 to December 2014. A, Monthly mean air temperature (◇) of experimental field, soil temperature of Pinus massoniana plantation (●) and Castanopsis carlesii plantation (○). B, Monthly rainfall of experimental field (□), soil water content of Pinus massoniana plantation (●) and Castanopsis carlesii plantation (○).
图4 两林分月生产量分别与温度因子的相关图及回归方程。
Fig. 4 Correlation diagrams and regression equations of fine roots monthly production and environmental factors of the two forests.
图5 马尾松及米槠人工林细根2年总生产量的径级分布(平均值±标准误差)。
Fig. 5 Distribution among diameter classes for total fine root production of Pinus massoniana and Castanopsis carlesii plantations during the two-year experiment period (mean ± SE).
图6 马尾松及米槠人工林细根2年总生产量的土层分布(平均值±标准误差)。
Fig. 6 Distribution among soil depths for total fine root production of Pinus massoniana and Castanopsis carlesii plantations during the two-year experiment period (mean ± SE).
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