干旱区生态环境知识资源中心(Arid): 覆膜玉米不同生育期土壤酶活性对大气CO

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	覆膜玉米不同生育期土壤酶活性对大气CO_2浓度升高的响应
其他题名	Effects of elevated CO_2 on soil enzyme activities at different growth stages of maize grown with plastic film mulching
	周娅 1; 冯倩 1; 王玉 1; 张晓媛 1; 王丽梅 2; 李世清 2
来源期刊	农业环境科学学报
ISSN	1672-2043
出版年	2019
卷号	38 期号:5 页码:1185-1192
中文摘要	为探讨旱区覆膜玉米农田土壤酶活性对未来气候变化的响应,在田间条件下通过改进的开顶式气室(OTC)系统自动控制大气CO_2浓度,设置自然大气CO_2浓度(CK)、OTC对照(OTC)、OTC系统自动控制CO_2浓度(700 mumol·mol~(-1),OTC+CO_2)3个处理,研究了旱区覆膜高产栽培春玉米播前、六叶期(V6)、十二叶期(V12)、吐丝期(R1)、乳熟期(R3)及完熟期(R6)土壤脲酶、碱性磷酸酶、蔗糖酶及过氧化氢酶活性对大气CO_2浓度升高的响应特征.研究发现:OTC处理条件下,土壤碱性磷酸酶活性相比CK在V12期降低8.80%(P<0.05),而在R6期提高8.95%(P<0.05);蔗糖酶活性在播前、V6、R1期降低12.65%~21.43%(P<0.05),R3期升高17.50%(P<0.05);过氧化氢酶活性在V12、R1、R6期均显著降低.大气CO_2浓度升高对玉米各生育期土壤脲酶活性均无显著影响;使R1、R6期碱性磷酸酶活性降低8.74%和6.39%(P<0.05);使V6、R3期蔗糖酶活性升高30.18%和18.37%(P<0.05);此外,增加了V12期过氧化氢酶活性,而降低了R3期过氧化氢酶活性.结果表明:当前旱作覆膜高产栽培模式下,大气CO_2浓度升高对春玉米农田土壤酶活性的影响因作物生育期和酶种类不同而异;土壤酶活性对OTC及大气CO_2浓度升高的响应程度不一,在当前试验条件下,OTC对土壤酶活性的影响较大气CO_2浓度升高更为显著.
英文摘要	A field experiment was conducted in a semiarid area to investigate the response of soil enzyme activities to climate change in a farmland of spring maize where plastic film mulching was used. Open-top chamber(OTC)system was used to control elevated CO_2 concentrations(700 mumol·mol~(-1), marked as OTC+CO_2)during the growing period of maize. At the same time, OTC systems with the current atmospheric CO_2 concentration(marked as OTC)and natural atmospheric CO_2 concentration(control, marked as CK)were also set up. Activities of soil urease, alkaline phosphatase, sucrase, and catalase, at the different growth stages of spring maize(i.e., pre-sowing, sixth leaf (V6)stage, twelfth leaf(V12)stage, silking(R1)stage, milk(R3), and physiological maturity(R6)stage), were measured. The results showed that, compared with CK, OTC treatment decreased the activity of soil alkaline phosphatase by 8.80% at the V12 stage(P<0.05), and increased it by 8.95%(P<0.05)at the R6 stage, decreased the soil invertase activity by 12.65%~21.43%(P<0.05)at the pre-sowing, V6, and R1 stages, but increased it by 17.50%(P<0.05)at the R3 stage, and significantly decreased the activity of catalase at the V12, R1, and R6 stages under OTC. Compared with OTC, OTC+CO_2 treatment had no significant effect on soil urease activity, increased the activity of soil sucrase by 30.18% and 18.37% at the V6 and R3 stages(P<0.05), respectively, and decreased the activity of alkaline phosphatase at the R1 and R6 stages by 8.74% and 6.39%(P<0.05), respectively. In addition, elevated CO_2 increased activity of catalase at the V12 stage, but reduced it at the R3 stage. In conclusion, the effect of elevated CO_2 on soil enzyme activities in spring maize farmland varied with the growth period and the enzyme. Further, under the current experimental conditions, the effect of OTC on soil enzyme activities was more significant than that of elevated CO_2.
中文关键词	开顶式气室 ; 大气CO_2浓度升高 ; 春玉米 ; 土壤酶活性
英文关键词	open-top chamber elevated CO_2 spring maize soil enzyme activity
语种	中文
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6497683
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315833
作者单位	1.西北农林科技大学资源环境学院, 杨凌, 陕西 712100, 中国; 2.西北农林科技大学资源环境学院;;西北农林科技大学, ;;黄土高原土壤侵蚀与旱地农业国家重点实验室, 杨凌;;杨凌, 陕西;;陕西 712100;;712100, 中国
推荐引用方式 GB/T 7714	周娅,冯倩,王玉,等. 覆膜玉米不同生育期土壤酶活性对大气CO_2浓度升高的响应[J],2019,38(5):1185-1192.
APA	周娅,冯倩,王玉,张晓媛,王丽梅,&李世清.(2019).覆膜玉米不同生育期土壤酶活性对大气CO_2浓度升高的响应.农业环境科学学报,38(5),1185-1192.
MLA	周娅,et al."覆膜玉米不同生育期土壤酶活性对大气CO_2浓度升高的响应".农业环境科学学报 38.5(2019):1185-1192.