干旱区生态环境知识资源中心(Arid): 喀斯特山区土地不同利用方式的土壤养分及微生物特征

Arid

	喀斯特山区土地不同利用方式的土壤养分及微生物特征
其他题名	Soil Nutrients and Microbial Characteristics under Different Land Utilization Patterns in Karst Mountainous Area
	文小琴 1; 舒英格 1; 何欢 2
来源期刊	西南农业学报
ISSN	1001-4829
出版年	2018
卷号	31 期号:6 页码:1227-1233
中文摘要	【目的】为贵州喀斯特山区石漠化生态恢复及退耕还林的顺利实施提供科学依据,【方法】在贵州省晴隆县典型喀斯特地区采集荒地、耕地、退耕还草地、林草间作地和楸树林地的土壤样品,并对其土壤理化性质、土壤微生物量碳/氮含量、土壤微生物数量和土壤酶活性进行分析。【结果】土地不同利用方式下,土壤养分含量存在差异,全磷含量退耕还草地最高,为0. 95g/kg,有效磷含量耕地最高,为6. 90 mg/kg,全氮、全钾、有机碳、碱解氮含量均是林草间地作最高,分别为4. 61、1. 19、54. 98 g/kg和406. 62 mg/kg;速效钾含量楸树林地的最高,为179. 5 mg/kg;土地不同利用方式的土壤微生物量碳含量为林草间作地>退耕还草地>楸树林地>耕地>荒地,微生物量氮含量为林草间作地>退耕还草地>楸树林地>耕地>荒地;与荒地相比,林草间作地和退耕还草地的土壤微生物量碳分别提高2. 46倍和2. 02倍,林草间作地和退耕还草地的土壤微生物量氮分别提高86. 92 %和77. 07 %。土地不同利用方式的土壤微生物数量存在较为明显的差异,均为细菌>放线菌>真菌。在土地不同利用方式下,土壤脲酶活性、蔗糖酶活性、磷酸酶活性均存在显著或不显著差异,过氧化氢酶活性差异均不显著。土地不同利用方式,土壤微生物群落多样性指数为耕地>林草间作地=楸树林地>退耕还草地>荒地,这种变化趋势与微生物总数的变化不一致。经相关性分析,土壤酶、微生物数量以及微生物量碳氮与土壤养分等具有较强的相关性,可用于表征土壤质量。【结论】林草间作方式具有较高的土壤微生物活性,该土地利用方式能有效改善喀斯特地区的生态环境。
英文摘要	【Objective】The present paper was conducted to provide the scientific basis for smooth implementation of stony desertification ecological restoration and returning farmland to forests in karst mountainous areas in Guizhou. 【Method】The physical and chemical properties, microbial biomass carbon/nitrogen content,microbial quantity and enzyme activity of soil samples collected from wasteland,farmland,returning farmland to grassland,forest and grass intercropping land and Chinese catalpa forest land in Qinglong County with a typical karst characteristics were analyzed.【Result】There was a difference in soil nutrients among five land utilization patterns. The highest total phosphorus content of returning farmland to grassland was 0. 95 g/kg. The highest available phosphorus content of farmland was 6. 90 mg/kg. The highest total nitrogen,total potassium,organic carbon,available nitrogen content of forest and grass intercropping land was 4. 61,1. 19,54. 98 g/kg and 406. 62 mg/kg respectively. The highest rapidly available potassium content of Chinese catalpa forest land was 179. 5 mg/kg. Soil microbial biomass carbon/nitrogen content under different land utilization patterns was forest and grass intercropping land > returning farmland to grassland > Chinese catalpa forest land > farmland > wasteland. Soil microbial biomass carbon of forest and grass intercropping land and returning farmland to grassland increased by 2. 46 times and 2. 02 times compared with wasteland respectively. Soil microbial biomass nitrogen of forest and grass intercropping land and returning farmland to grassland was 86. 92 % and 77. 07 % higher than wasteland separately. There was an obvious difference in quantity of different soil microbial under five land utilization patterns but the microbial quantity was bacteria > actinomycetes > fungi under five land utilization patterns. There was a significant difference or very significant difference in urease,sucrase and phosphatase activity but no difference in catalase activity under five land utilization patterns. The soil microbial community diversity of five land utilization patterns was farmland > forest and grass intercropping land = Chinese catalpa forest land > returning farmland to grassland > wasteland and the variation trend is not consistent with variation of total microorganism. The correlation analysis showed that soil enzyme,microbial quantity and microbial biomass carbon/nitrogen were closely related to soil nutrients. 【Conclusion】The forest and grass intercropping land utilization pattern with a higher soil microbial activity can be used to effectively improve the ecological environment in karst region.
中文关键词	喀斯特山区 ; 土地利用 ; 土壤微生物量碳/氮 ; 土壤微生物数量 ; 土壤酶
英文关键词	Karst mountainous area Land utilization Soil microbial biomass carbon/nitrogen Soil microbial quantity Soil enzyme
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6280252
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238507
作者单位	1.贵州大学农学院, 贵阳, 贵州 550025, 中国; 2.贵州大学生命科学学院, 贵阳, 贵州 550025, 中国
推荐引用方式 GB/T 7714	文小琴,舒英格,何欢. 喀斯特山区土地不同利用方式的土壤养分及微生物特征[J],2018,31(6):1227-1233.
APA	文小琴,舒英格,&何欢.(2018).喀斯特山区土地不同利用方式的土壤养分及微生物特征.西南农业学报,31(6),1227-1233.
MLA	文小琴,et al."喀斯特山区土地不同利用方式的土壤养分及微生物特征".西南农业学报 31.6(2018):1227-1233.