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黄土丘陵区小流域侵蚀环境对土壤微生物量及酶活性 的影响
杨佳佳1,2; 安韶山; 张   宏2; 陈亚南2; 党廷辉1,2
2015
Source Publication生 态 学 报
Volume35Issue:17Pages:5666 - 5674
Abstract

土壤侵蚀环境直接影响土壤的特性,对土壤微生物的形成和稳定具有重要的影响。土壤微生物量推动着土壤的物质循环
和能量流动,对土壤中各种环境的变化有很强的敏感性。土壤酶活性能表示土壤微生物功能的多样性,与土壤微生物量有着紧
密的联系。为了探究不同侵蚀环境对土壤微生物量和酶活性的影响,以黄土丘陵区陈家坬小流域为研究区,选择 5 种不同侵蚀
环境下 0 — 10cm 和 10 — 20cm 土层的土壤为研究对象,对土壤微生物量及其土壤蔗糖酶、脲酶和碱性磷酸酶活性进行了研究。
结果表明:( 1 )土壤微生物量碳、氮、磷含量均表现为 0 — 10cm 大于 10 — 20cm 土层;土壤微生物量碳和磷在阴沟坡最大,在阳梁
峁坡和峁顶较小,且阴沟坡和峁顶差异显著;土壤微生物量氮在阳沟坡最大,阴阳梁峁坡最小,差异性显著( P <0.01 )。( 2
)土
壤脲酶、蔗糖酶和碱性磷酸酶活性均表现为 0 — 10cm 大于 10 — 20cm 土层,且在不同侵蚀环境下均表现为阴梁峁坡最大,阳梁
峁坡最小。( 3 )相关性分析表明,土壤微生物量碳、氮、磷与土壤脲酶、蔗糖酶、碱性磷酸酶活性之间均有极显著的正相关。

Other Abstract

Erosion directly affects soil characteristics and has a significant effect on the formation and stability of the
soil microbial community.Soil microbial biomass not only plays a significant role in energy flow and nutrient cycling ,
but it also shows great sensitivity to changes in soil environment.Soil enzyme activities are indicative of the
functional diversity of the soil microbial community , as they
are closely associated with soil microbial biomass.To
reveal the effect of different erosion environments on soil microbial biomass and soil enzyme activities , soil samples
were collected from the Chengjiawa watershed , located in the Yanhe watershed of the hill and gully region of Ansai
County , Yan′an , Shaanxi Province
, China.Soil samples were collected from five erosion environments in the valley ,
at depths of 0 — 10cm and 10 — 20cm.We studied the characteristics of soil microbial biomass including carbon ,
nitrogen , and phosphorus , soil enzyme activities including soil urease , invertase , and alkaline phosphatase , and
correlations between soil microbial biomass and enzyme activities.The results showed that :( 1 ) Soil microbial
biomass carbon , nitrogen , and phosphorus were significantly different between the 0 — 10cm and 10 — 20cm soil  layers ; soil microbial biomass carbon and phosphorus in the shaded lower slopes were higher than in the other tested
environments , whereas in the sunny middle slope and the hill top
they
were lower than in the other tested soil
environments.The difference between the shaded lower slopes and sunny hill top were significant.Soil microbial
biomass nitrogen in the sunny lower slope was significantly higher than in the other tested soil environments.
Overall , soil microbial biomass of the ditch slope was higher than in the other tested environments.This suggested
that the erosion affects the soil microbial properties , and that soil nutrient accumulation and mineralization ability of
soils on the downhill slope were higher than in other tested locations. ( 2 ) Soil urease , sucrase , and alkaline
phosphatase activities were higher in the 0 — 10cm layer than in the 10 — 20cm layer.In different erosion
environments , soil enzyme activities were higher in the shaded middle slope than in any other tested environments ,
while they were the lowest in the sunny
middle slopes.Soil alkaline phosphatase activity did not significantly differ
between different soil environments.Soil invertase activity in the shaded middle slopes was significantly different
from the other four types of erosion environments.The difference in soil urease activity between the shaded lower
slope and other tested environments was significant.Comparisons showed that the environment exposed to erosion
affected the properties of soil enzyme activities ; the responses of soil invertase and urease were more sensitive to
changes in the soil environment. ( 3 ) Pearson correlation analysis showed that soil microbial biomass carbon ,
nitrogen , and phosphorus were significantly positively correlated with each other , as were the soil urease , sucrase ,
and alkaline phosphatase activities.There was a significant positive correlation between soil microbial biomass and
soil enzyme activities , which suggested that these two properties were closely linked and inseparable components of
the soil microbial community.Different environments exposed to erosion have diverse levels of soil organic matter
content , different physicochemical properties of the soil , diverse forms of soil microbes , and differ in the amount of
soil microbial biomass and soil enzyme activities.These differences were reflected in the soil quality , vegetation
types , and resistance to soil erosion.

Keyword黄土丘陵 侵蚀环境 土壤微生物量 酶活性
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/361005/8390
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学,黄土高原土壤侵蚀与旱地农业国家重点实验室,杨陵  712100
2.西北农林科技大学资源环境学院,杨陵  712100
Recommended Citation
GB/T 7714
杨佳佳,安韶山,张   宏,等. 黄土丘陵区小流域侵蚀环境对土壤微生物量及酶活性 的影响[J]. 生 态 学 报,2015,35(17):5666 - 5674.
APA 杨佳佳,安韶山,张   宏,陈亚南,&党廷辉.(2015).黄土丘陵区小流域侵蚀环境对土壤微生物量及酶活性 的影响.生 态 学 报,35(17),5666 - 5674.
MLA 杨佳佳,et al."黄土丘陵区小流域侵蚀环境对土壤微生物量及酶活性 的影响".生 态 学 报 35.17(2015):5666 - 5674.
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