水土保持学报2017，Vol.31Issue(3)：263-270,8.DOI:10.13870/j.cnki.stbcxb.2017.03.044
封育和水平沟生态恢复措施对宁夏黄土丘陵区典型草原土壤生物学特性的影响
Effects of Enclosure and Level Trench Engineering Ecological Restoration on Soil Biological Characteristics of Typical Steppe in Loess Hilly Area in Ningxia
摘要
Abstract
In order to provide the basis for ecological construction in the area of grassland,we studied the effects of enclosure and level trench ecological restoration on soil biological characteristics in the hilly Loess Plateau Gully steppe.Using the method of space gradient instead of time gradient,in typical steppe in the loess hilly area of Ningxia,we selected soils in areas which included the unenclosed (grazing),enclosed for 3-15 years,the level trench after 1-15 years,analyzed the change characteristics and relationship of the number of microorganisms,soil microbial biomass nitrogen and carbon,and soil enzyme activity the in 0-10 cm,10-20 cm,20-30 cm,and 30-40 cm soil layers.The results showed that:(1) Soil microbial community in the test area was dominated by actinomycetes,which accounted for 86.18％-94.43％,and the overall order was actinomycetes ＞ bacteria ＞ fungi,the amount of soil microorganisms,the number of bacteria and actinomycetes,microbial biomass carbon and nitrogen,urease,protease,phosphatase,sucrase activity all showed an upward change with the increase of enclosure ages,but they all showed an up-down-up trend in level trench,the change of soil catalase activity had a opposite trend between the enclosure and level trench,and the number of fungi was lower in FY6 and SP6,being 11.33 cfu/g and 4.67 cfu/g,respectively;(2) Under different treatments,in the 0-40 cm soil layer,microbial and enzyme activity in the upper soil was higher than in the underlying soil.The correlations between soil microorganism,enzyme activity and contents organic matter and main nutrients were significant (p＜0.05);(3) Within the similar recovery period,the number of soil microorganisms,microbial biomass carbon and nitrogen,and enzyme activity were generally higher in the enclosed grassland (p ＜ 0.05);Our research showed that,compared with level trench,enclosure was more conducive to increase soil microorganisms and enzyme activities in typical steppe of the Loess Hilly Area.关键词
黄土丘陵区典型草原/土壤微生物/土壤酶活性/水平沟/禁牧封育Key words
typical steppe in Loess Hilly Area/soil microorganism/soil enzyme activities/level trench/enclosure分类
农业科技引用本文复制引用
周瑶,马红彬,贾希洋,沈艳,周静静,闫鹏科,陆琪,王建伟..封育和水平沟生态恢复措施对宁夏黄土丘陵区典型草原土壤生物学特性的影响[J].水土保持学报,2017,31(3):263-270,8.基金项目
国家自然科学基金项目(31460632) （31460632）
中国科学院西部之光人才培养引进计划项目(XAB2015A10) （XAB2015A10）
