摘要
本文研究了杉木和枫香混交经营5 a后对杉木生长和林分土壤肥力的影响。结果表明:虽然杉木与枫香混交造林降低了杉木的存活率,保存率仅为87.0%,但混交林中杉木和枫香的平均胸径、树高均显著大于杉木纯林,其中杉木的平均树高、胸径分别为4.68 m、5.41 cm,分别是杉木纯林的1.20和1.19倍,说明杉木与枫香混交经营促进了杉木的树体生长;混交林土壤中的有机碳累积量大于纯林,且土壤的养分指标如全氮、全磷、水解氮、速效磷的含量均比杉木纯林高,阳离子交换量(CEC)和盐基离子含量分别比杉木纯林增加了17.37%和18.11%,说明混交林在提高土壤固碳能力的同时,也使林地的肥力状况得到一定程度的改善。
This study examined the effect of 5-year mixed forest management of Cunninghamia lanceolata(Chinese fir)and Liquidambar sweetliquidambar on tree growth and soil fertility.The results indicated that although the survival rate of C.lanceolata decreased to 87.0%in the mixed forest,both the mean tree height and diameter of breast high(DBH)of the two species in the mixed forest exceeded that of the Chinese fir monoculture plantation.For Chinese fir in the mixed forest,the mean tree height and DBH were 4.68 m and 5.41 cm,respectively,which is 1.20 and 1.19 times higher than that in Chinese fir monoculture plantation.This finding suggests that mixed forest management of Chinese fir and L.sweetliquidambar accelerates Chinese fir tree growth.Soil organic carbon(C)accumulation,and soil nutrient content such as total nitrogen(N)and phosphorus(P),hydrolyzable N and available P in the mixed forest were all higher than that in the Chinese fir monoculture plantation.Moreover,both cation exchange capacity(CEC)and base ion content in the mixed forest increased by 17.37%and 18.11%,respectively,compared with those in the Chinese fir monoculture plantation.This finding shows that mixed forest management may enhance forest soil C sequestration and improve soil fertility as well.
作者
钟祥顺
ZHONG Xiangshun(Louziba stated owned forest farm,Changting County of Fujian Province,Changting 366300,Fujian,China)
出处
《福建林业》
2022年第4期40-43,共4页
Fujian Forestry
基金
福建省科技厅对外合作项目“亚热带人工林土壤固碳技术研究”(2021I0011)。
关键词
杉木
枫香
混交林
生长量
土壤肥力
Cunninghamia lanceolata
Liquidambar formosana
mixed forests
growth volume
soil fertility
