长期养分添加对贝加尔针茅草原中小型土壤节肢动物群落的影响  

Effects of long-term nutrient addition on meso-micro soil arthropod communities in a Stipa baicalensis grassland

作　　者：武振丹 红梅[1,2] 马尚飞 卢俊艳 裴志福 杨殿林 WU Zhendan;HONG Mei;MA Shangfei;LU Junyan;PEI Zhifu;YANG Dianlin(Inner Mongolia Agricultural University,Huhhot,010011,China;Inner Mongolia Key Laboratory of Soil Quality and Nutrient Resources,Huhhot,010011,China;Agro-Environmental Protection Institute,Ministry of Agriculture and Rural Affairs of China,Tianjin 300191,China)

机构地区：[1]内蒙古农业大学,呼和浩特010011 [2]内蒙古自治区土壤质量与养分资源重点实验室,呼和浩特010011 [3]农业农村部环境保护科研监测所,天津300191

出　　处：《应用与环境生物学报》2022年第6期1534-1541,共8页Chinese Journal of Applied and Environmental Biology

基　　金：国家自然科学基金项目(31170435)资助。

摘　　要：为解析养分添加对贝加尔针茅草甸草原中小型土壤动物群落的影响,于2010年在内蒙古呼伦贝尔市鄂温克旗贝加尔针茅草甸草原设计氮磷添加试验,研究施N、P和NP混合施入(其中N和P的施入量均为100 kg hm-2a-1)对土壤动物群落结构和多样性的变化及其与环境因子之间的关系.土壤动物于2019年牧草返青期(5月)、生长期(8月)和枯黄期(9月末)进行采集.结果显示,与对照相比,N和NP添加使土壤动物个体数显著增加了1.38倍和1.15倍,类群数显著增加28.57%和21.43%,P处理土壤动物个体数和类群数高于对照,但未达到显著水平;(2)试验区植被生长期(8月)良好的水热条件更适合土壤动物群落的发展;(3)冗余分析(RDA)的结果进一步表明,土壤动物的群落组成主要受pH和植物均匀度影响,且pH是控制中小型土壤动物群落变化的主要因子.本研究揭示长期的养分添加通过改变植物均匀度与土壤pH对中小型土壤节肢动物群落产生积极影响,且土壤pH比植物均匀度的贡献更大.(图6表3参37)To analyze the effect of nutrient addition on small-and medium-sized soil arthropod communities in a Stipa Baikal meadow grassland, a nitrogen(N) and phosphorus(P) addition experiment was designed in the Stipa Baikal meadow grassland at Ewenki Banner, Hulunbeier City, Inner Mongolia, China in 2010. Changes in the structure and diversity of soil arthropod communities and their relationship with environmental factors were studied. Soil arthropod samples were collected during the forage greening(May), growth(August), and yellowing(end of September) periods in 2019. The results showed that:(1) compared to the control sample, N-added and NP-added samples had higher number of soil arthropods by 1.38 and 1.15 times, respectively, and an increase of 28.57% and 21.43% in the number of soil arthropod groups. The numbers of individual as well as groups of soil arthropods tended to increase with P addition;however, this response did not reach a significant level.(2)The water and heat conditions during the vegetation growth period in the test area were more suitable for the development of soil fauna communities.(3) The redundancy analysis(RDA) results further indicated that the community composition of soil fauna is mainly regulated by pH and plant evenness, and soil pH is particularly important in mediating changes in small-and medium-sized soil fauna communities. This study suggests that long-term nutrient addition has a positive impact on small-and medium-sized soil arthropod communities by changing plant evenness and soil pH, and the contribution of soil pH is greater than that of plant evenness.

关 键 词：氮磷添加 草甸草原 中小型土壤节肢动物群落 环境因子 

分 类 号：S812.2[农业科学—草业科学]