干旱区生态环境知识资源中心(Arid): 施氮对西北荒漠灌区紫花苜蓿土壤理化性质及微生物数量的影响

Arid

	施氮对西北荒漠灌区紫花苜蓿土壤理化性质及微生物数量的影响
其他题名	Effect of nitrogen application on soil physicochemical propertyand microbial quantityof alfalfa in desert irrigation area of Northwest China
	吴勇; 刘晓静; 童长春; 赵雅姣
来源期刊	草原与草坪
ISSN	1009-5500
出版年	2020
卷号	40 期号:6
中文摘要	以甘农3号紫花苜蓿为材料,设5个氮水平(0、51.75、103.5、155.25、207 kg/hm~2),通过2年(2016年、2017年)田间试验,探究不同施氮处理对紫花苜蓿土壤全氮、有机质、碱解氮含量等土壤的养分、pH值及土壤微生物数量的影响,并对土壤养分与微生物数量进行相关性分析。结果表明:施氮可以提高紫花苜蓿土壤有机质、碱解氮含量,降低土壤pH值。当施氮量为51.7 5、103.5 kg/hm~2时,紫花苜蓿土壤有机质、碱解氮含量最高,2016年和2017年分别为15.7 g/kg、17.89 g/kg和41.8 mg/kg、 65.2 mg/kg,同时土壤微生物(细菌、真菌和放线菌)的数量最多。土壤全氮、碱解氮、有机质含量及pH值均与真菌、细菌和放线菌数量成正相关关系,其中土壤有机质含量与真菌和细菌数量呈极显著正相关(P<0.01),与放线菌数量呈显著正相关(P<0.05),pH值与放线菌数量呈显著正相关(P<0.05 )。因此,当施氮量为51.75、103.5 kg/hm~2时,可以有效改善土壤理化性质,提高土壤微生物数量。
英文摘要	In order to explore the effect of nitrogen application on the number of alfalfa soil microorganisms under the condition of low soil nutrients and high salinization in desert irrigation area of Northwest China,alfalfa Gannong 3'was used as material and 5 nitrogen levels(0 kg/hm~2,51.75 kg/hm~2,103.5 kg/hm~2,155.25 kg/ hm2,and 207 kg/hm~2)were tested in the field for two years(2016 and 2017).The effects of different nitrogen application treatments on soil total nitrogen,organic matter,pH value,alkali-hydrolyzable nitrogen content of alfalfa, and the number of soil microorganisms were studied,and the correlation between soil nutrients and microorganisms was analyzed.The results showed that nitrogen application could increase the content of organic matter and alkali-hydrolyzable nitrogen in alfalfa soil and decrease the pH value of soil.In this study,when the amount of nitrogen application was 51.75 kg/hm~2 and 103.5 kg/hm~2,the contents of organic matter and alkalihydrolyzable nitrogen in alfalfa soil were the highest,which was 15.7 g/kg、17.89 g/kg and 41.8 mg/kg、65.2 mg/kg in two years,respectively,and the number of soil microorganisms(bacteria,fungi and actinomycetes)in alfalfa soil was the highest.Soil total nitrogen,alkali-hydrolyzable nitrogen,organic matter,and pH value were positively correlated with the number of fungi,bacteria,and actinomycetes,and soil organic matter showed an extremely significant positive correlation with fungi and bacteria(P<0.01),a significant positive correlation with actinomycetes(P<0.05),and PH was significantly positively correlated with actinomycetes(P<0.05). Therefore,when the amount of nitrogen application is 51.75 kg/hm~2 and 103.5 kg/hm~2,it can effectively improve the physical and chemical properties of soil and increase the number of soil microorganisms.
中文关键词	施氮 ; 紫花苜蓿 ; 土壤微生物数量 ; 土壤养分 ; 相关性
英文关键词	nitrogen application alfalfa soil microbial quantity soil nutrients correlation
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6895966
来源机构	甘肃农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353371
作者单位	吴勇, 甘肃农业大学草业学院,中-美草地畜牧业可持续发展研究中心, 草业生态系统教育部重点实验室;;甘肃省草业工程实验室, 兰州, 甘肃 730070, 中国. 刘晓静, 甘肃农业大学草业学院,中-美草地畜牧业可持续发展研究中心, 草业生态系统教育部重点实验室;;甘肃省草业工程实验室, 兰州, 甘肃 730070, 中国. 童长春, 甘肃农业大学草业学院,中-美草地畜牧业可持续发展研究中心, 草业生态系统教育部重点实验室;;甘肃省草业工程实验室, 兰州, 甘肃 730070, 中国. 赵雅姣, 甘肃农业大学草业学院,中-美草地畜牧业可持续发展研究中心, 草业生态系统教育部重点实验室;;甘肃省草业工程实验室, 兰州, 甘肃 730070, 中国.
推荐引用方式 GB/T 7714	吴勇,刘晓静,童长春,等. 施氮对西北荒漠灌区紫花苜蓿土壤理化性质及微生物数量的影响[J]. 甘肃农业大学,2020,40(6).
APA	吴勇,刘晓静,童长春,&赵雅姣.(2020).施氮对西北荒漠灌区紫花苜蓿土壤理化性质及微生物数量的影响.草原与草坪,40(6).
MLA	吴勇,et al."施氮对西北荒漠灌区紫花苜蓿土壤理化性质及微生物数量的影响".草原与草坪 40.6(2020).