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黄土丘陵区植被类型与土壤微生物区系及生物量的关系
田琴1,5; 牛春梅2; 谷口武士3; 山中典和3; 时伟宇4; 杜盛1,2
2017
Source Publication生态学报
Volume37Issue:20Pages:6847-6854
Abstract

以陕西延安黄土丘陵区5 种不同植被类型( 人工刺槐林、天然侧柏林、天然辽东栎林、灌丛和裸地) 为研究对象,分析了土
壤微生物生物量碳、氮含量、细菌和真菌的丰度变化规律及其与土壤基本化学性质的关系。结果表明: ( 1) 4 种植被类型的土壤
质量较之裸地都有不同程度的改善,总体趋势: 天然林地>人工林地>裸地; ( 2) 土壤微生物生物量碳、氮的总体趋势: 天然林地
最高,人工林次之,裸地最低,且与土壤有机碳( SOC) 、全氮( TN) 和速效磷( AP) 极显著正相关( P < 0.01) ; ( 3) 裸地土壤的细菌
丰度最低,人工刺槐林真菌含量显著低于天然辽东栎林。细菌丰度与土壤营养状况呈显著正相关( P < 0.05) ,而真菌与土壤营
养无明显相关性,只与土壤pH 负相关。说明在该研究区域,植被类型与土壤质量对微生物资源都具有不同程度的作用。

Other Abstract

To remedy adverse impacts on ecological environments,vegetation restoration has been completed on the Loess
Hilly region of China,thus yielding changes in vegetation types,and secondary forests and exotic vegetation have reclaimed
most of this area. Vegetation type plays an important role in soil quality,and similar land-use types usually possess similar
soil properties and,most likely,similar microbial communities. To assess the effects of vegetation type on soil development,
we measured the basic physicochemical properties,microbial biomass carbon ( MBC) and nitrogen ( MBN) ,and the
number of bacteria and fungi of soils from areas with five different vegetation types,including a secondary natural oak
forest,a non-typical natural forest of oriental arborvitae,a natural shrub land,a planted forest of black locust,and a plot ofunforested bare land. We found that ( 1) soil properties improved with the presence of vegetation,compared with the
abandoned bare land,and that there were differences in the physicochemical properties of soil from the different land-use
types. Soils from the bare land and black locust forest yielded higher pH values than the natural forests,and the overall
trend of soil quality was: natural forest > plantation > bare land. This indicated that vegetation coverage,especially natural
types,has a beneficial effect on soil nutrient conditions and soil pH. ( 2) Similar to the trend of the other soil parameters,
both MBC and MBN were highest in the oak forest and shrub land and lowest in the bare land and black locust forest. These
two indices ( MBC and MBN) were also strongly correlated with specific soil properties ( soil organic carbon,r2 = 0.725,
total nitrogen,r2 = 0.736,and phosphorus,r2 = 0.775; P < 0.001) ,suggesting that vegetation type and soil properties
influence microbial biomass. Thus,microbial biomass can be used to assess soil trophic status and which lower in
oligotrophic soils on the Loess Plateau of China. In our study area,the soil was alkaline ( pH 8.18—8.48) ,and the MBC/
MBN ratio was ~ 6,indicating that actinomycetes were dominant,possibly facilitated by the alkaline soil conditions. ( 3)
Bare land harbored the lowest abundance of bacteria,and the abundance of fungi in the black locust was lower than that of
the oak forest. The abundance of bacteria exhibited a strong relationship with specific soil properties and was positively
correlated with C/N ratio ( r2 = 0.754,P < 0.001) ,soil organic carbon ( r2 = 0.636,P < 0.05) ,total nitrogen ( r2 = 0.
611,P < 0.05) ,and phosphorus ( r2 = 0.775,P < 0.05) ,and negatively correlated with pH ( r2 = 0.761,P < 0.001) . In
contrast,the abundance of fungi was only correlated with soil pH,thus confirming previous reports that bacteria and fungi
respond to different environmental factors. This discrepancy may result from the different functions of bacteria and fungi.
Fungi are primarily responsible for the decomposition of recalcitrant soil organic matter in forest soils. Thus,the overall
trend of soil characteristic was: natural forest > plantation > bare land,indicating that the recovery of soil quality differed
among plots with different vegetation types,and both soil microorganisms and soil microbial biomass,to a certain extent,
can be used as an important index of soil fertility.

Keyword植被类型 土壤细菌 土壤真菌 土壤微生物生物量碳 土壤微生物生物量氮
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8428
Collection水保所知识产出(1956---)
Affiliation1.中国科学院水利部水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室
2.西北农林科技大学
3.日本鸟取大学干燥地研究中心,鸟取
4.西南大学地理科学学院,重庆
5.中国科学院大学,北京
First Author Affilication中国科学院水利部水土保持研究所
Recommended Citation
GB/T 7714
田琴,牛春梅,谷口武士,等. 黄土丘陵区植被类型与土壤微生物区系及生物量的关系[J]. 生态学报,2017,37(20):6847-6854.
APA 田琴,牛春梅,谷口武士,山中典和,时伟宇,&杜盛.(2017).黄土丘陵区植被类型与土壤微生物区系及生物量的关系.生态学报,37(20),6847-6854.
MLA 田琴,et al."黄土丘陵区植被类型与土壤微生物区系及生物量的关系".生态学报 37.20(2017):6847-6854.
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