Effects of Moso Bamboo Expansion on Soil Carbon,Nitrogen,Phosphorus and Ecological Stoichiometry Characteristics of Forest in Mufu Mountain Area
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国家科技期刊平台
NETL
NSTL
万方数据
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(NO3--N)、铵态氮(NH4+-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NO3--N呈不规律变化外,SOC、TN、TP、NH4+-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0～10cm 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 0～10cm和20～30cm 土层NH4+-N含量,毛竹向阔叶林扩张增加了 10～20 cm 土层NH4+-N含量及20～30 cm 土层NO3--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0～10cm 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NH4+-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NH4+-N含量和深层土壤NO3--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,NO3--N,NH4+-N and their ecological stoichiometric ratios in different forest types were analyzed.The results showed that the contents of SOC,TN,TP and NH4+-N decreased gradually with the increase of soil depth under the 2 expansion patterns,except the content of NO3--N changed irregularly.During the expansion of moso bam-boo 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 NH4+-N content both in 0-10 cm and 20-30 cm soil layers,and the expansion to broad-leaved forest increased NH4+-N content in 10-20 cm soil layer and NO3--N content in 20-30 cm soil layer.There was no significant ef-fect of moso bamboo expansion to Chinese fir forest on soil C/N,C/P and N/P,while the expansion to broad-leaved 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 NH4+-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 NH4+-N contents in middle soil and NO3--N content in deep soil layer.
Moso bamboo expansionChinese fir forestbroad-leaved forestsoil nutrientecological stoi-chiometryMufu mountain area
国家科技期刊平台
NSTL
万方数据
