| 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 |
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| 引用本文： | 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. |
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| 作者姓名： | 周 瑶 马红彬 贾希洋 沈 艳 周静静 闫鹏科 陆 琪 王建伟 |
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| 作者单位： | 1. 宁夏大学农学院,银川,750021;2. 宁夏大学西北土地退化与生态恢复国家重点实验室培育基地,银川750021;宁夏大学农学院,银川750021 |
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| 基金项目： | 国家自然科学基金项目(31460632)，中国科学院西部之光人才培养引进计划项目(XAB2015A10) |
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| 摘 要： | 研究禁牧封育和水平沟生态恢复措施下黄土丘陵区典型草原土壤生物学特性变化,以期为该区草地生态建设提供依据。采用空间梯度代替时间梯度的方法,在宁夏黄土丘陵区典型草原,选取未封育(放牧)、封育3~15a、水平沟整地后1~15a的土壤,分析0—10,10—20,20—30,30—40cm土壤微生物数量、微生物生物量碳、量氮和土壤酶活性的变化特征及其相关性。结果表明:(1)试验区土壤微生物类群以放线菌为主,达到86.18%~94.43%,数量表现为放线菌细菌真菌,土壤微生物总数、细菌和放线菌数、微生物生物量碳、量氮含量,脲酶、蛋白酶、磷酸酶、蔗糖酶活性随着草地封育年限增加呈上升变化,但水平沟措施下随着整地年限延长呈上升—下降—上升的趋势,2种措施下土壤过氧化氢酶活性变化趋势与其他指标相反,真菌数在封育6a和水平沟6a较低,分别为11.33,4.67cfu/g;(2)各处理下,0—40cm土壤微生物和酶活性整体呈现上层土壤高于下层土壤,土壤微生物、酶活性与有机碳等主要养分含量相关性显著(p0.05);(3)相近恢复年限下,土壤微生物数量、微生物生物量碳、微生物生物量氮以及酶活性总体为封育草地高于水平沟(p0.05);研究认为,禁牧封育较水平沟措施更有利于黄土丘陵区典型草原土壤微生物和酶活性的增加。
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| 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 |
Effects of Enclosure and Level Trench Engineering Ecological Restoration on Soil Biological Characteristics of Typical Steppe in Loess Hilly Area in Ningxia |
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| ZHOU Yao,MA Hongbin,JIA Xiyang,SHEN Yan,ZHOU Jingjing,YAN Pengke,LU Qi,WANG Jianwei.Effects of Enclosure and Level Trench Engineering Ecological Restoration on Soil Biological Characteristics of Typical Steppe in Loess Hilly Area in Ningxia[J].Journal of Soil and Water Conservation,2017,31(3):263-270. |
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| Authors: | ZHOU Yao MA Hongbin JIA Xiyang SHEN Yan ZHOU Jingjing YAN Pengke LU Qi WANG Jianwei |
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| Institution: | 1. State Key Laboratory Breeding Base of Land Degradation and Ecological Restoration of North-western China, Yinchuan 750021; 2. Agricultural College, Ningxia University, Yinchuan 750021 |
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| 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. |
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| Keywords: | typical steppe in Loess Hilly Area soil microorganism soil enzyme activities level trench enclosure |
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