摘要
以幕阜山区同一片毛竹林向两侧杉木林和阔叶林扩张形成的连续生态界面为研究对象,分析不同林型土壤有机碳(SOC)、全氮(TN)、全磷(TP)、硝态氮(NO_(3)^(−)−N)、铵态氮(NH_(4)^(+)−N)含量及其生态化学计量比,探讨毛竹不同扩张模式对森林土壤碳(C)、氮(N)、磷(P)的影响。结果表明:在2种扩张模式下,随土壤层次的增加,除NO_(3)^(−)−N呈不规律变化外,SOC、TN、TP、NH_(4)^(+)−N含量均呈逐渐降低趋势。在毛竹向杉木林扩张过程中,杉木林、竹杉混交林、毛竹林同一土层SOC、TN、TP含量均无显著差异;在毛竹向阔叶林扩张过程中,毛竹林0~10 cm土层SOC和TN含量较阔叶林和竹阔混交林分别降低了27.71%、30.45%和36.67%、31.11%,而在10~20 cm和20~30 cm土层则无显著差异;毛竹扩张对杉木林和阔叶林各土层TP含量无显著影响;毛竹向杉木林扩张增加了0~10 cm和20~30 cm土层NH_(4)^(+)−N含量,毛竹向阔叶林扩张增加了10~20 cm土层NH_(4)^(+)−N含量及20~30 cm土层NO_(3)^(−)−N含量;毛竹向杉木林扩张对土壤C/N、C/P、N/P无显著影响,毛竹向阔叶林扩张导致0~10 cm土层N/P明显降低、10~20 cm土层C/N显著增加。综上,毛竹向杉木林扩张对土壤SOC、TN、TP影响不显著,但提升了表层和深层土壤NH_(4)^(+)−N含量,毛竹向阔叶林扩张造成表层土壤SOC、TN含量显著降低,并导致中层土壤NH_(4)^(+)−N含量和深层土壤NO_(3)^(−)−N含量明显增加。
To study the effect of moso bamboo expansion on soil carbon(C),nitrogen(N)and phosphorus(P)into different stands,we selected 2 continuous interfaces from a moso bamboo stand to its surrounding Chinese fir forest and broad-leaved forest in Mufu mountain area as the research objects.The contents of SOC,TN,TP,NO_(3)^(−)−N,NH_(4)^(+)−N and their ecological stoichiometric ratios in different forest types were analyzed.The results showed that the contents of SOC,TN,TP and NH_(4)^(+)−N decreased gradually with the increase of soil depth under the 2 expansion patterns,except the content of NO_(3)^(−)−N changed irregularly.During the expansion of moso bamboo to Chinese fir forest,there was no significant difference in SOC,TN and TP contents in the same soil layer.However,during the expansion of bamboo to broad-leaved forest,the SOC and TN contents in 0–10 cm soil layer of bamboo forest decreased by 27.71%and 30.45%compared to those in broad-leaved forest and d−ecrease 36.67%and 31.11%compared to bamboo broad-leaved mixed forest,while there was no significant difference in 10–20 cm and 20–30 cm soil layers.Moso bamboo expansion had no significant effect on TP content in each soil layer of Chinese fir forest and broad-leaved forest.The expansion of moso bamboo to Chinese fir forest increased NH_(4)^(+)−N content both in 0–10 cm and 20–30 cm soil layers,and the expansion to broad-leaved forest increased NH_(4)^(+)−N content in 10–20 cm soil layer and NO_(3)^(−)−N content in 20–30 cm soil layer.There was no significant effect of moso bamboo expansion to Chinese fir forest on soil C/N,C/P and N/P,while the expansion to broadleaved forest resulted in a significant decrease in N/P in 0–10 cm soil layer and a significant increase in C/N in 10–20 cm soil layer.In conclusion,the expansion of moso bamboo to Chinese fir forest had no significant effect on the SOC,TN and TP contents,but increased the content of NH_(4)^(+)−N in surface and deep soil layer.However,the expansion of moso bamboo to broadleaved forest resulted in a significant decrease in SOC and TN contents in surface soil,and a significant increase in NH_(4)^(+)−N contents in middle soil and NO_(3)^(−)−N content in deep soil layer.
作者
王晓荣
胡兴宜
龚苗
辜忠春
戴薛
夏少丹
刘清平
牛红玉
Wang Xiaorong;Hu Xingyi;Gong Miao;Gu Zhongchun;Dai Xue;Xia Shaodan;Liu Qingping;Niu Hongyu(Hubei Academy of Forestry,Wuhan Hubei 430075,China;National Positioning Observation and Research Station of Bamboo Forest Ecosystem in Mufu Mountain,Xianning Hubei 437100,China;Xianning Academy of Forestry,Xianning Hubei 437100,China;School of Life Sciences,Central China Normal University,Wuhan Hubei 430079,China)
出处
《西南林业大学学报（自然科学）》
CAS
北大核心
2024年第2期77-85,共9页
Journal of Southwest Forestry University：Natural Sciences
基金
湖北省自然科学基金项目(2021CFB505)资助
国家自然科学基金项目(31870416)资助。
关键词
毛竹扩张
杉木林
阔叶林
土壤养分
生态化学计量
幕阜山区
Moso bamboo expansion
Chinese fir forest
broad-leaved forest
soil nutrient
ecological stoichiometry
Mufu mountain area
