干旱区生态环境知识资源中心(Arid): 水氮控制对荒漠草原凋落物分解的影响

Arid

	水氮控制对荒漠草原凋落物分解的影响
其他题名	Effects of Water and Nitrogen Control on the Decomposition of Litter in Desert Grassland
	霍利霞 1; 红梅 2; 赵巴音那木拉 1; 高海燕 1; 叶贺 1
来源期刊	中国草地学报
ISSN	1673-5021
出版年	2018
卷号	40 期号:5 页码:57-63
中文摘要	为探讨水氮控制对荒漠草原优势植物无芒隐子草和冷蒿凋落物分解的影响,设置自然降雨(CK)、增雨30%(W)和减雨30%(R)3个水分处理以及0(N0)、30kg/hm~2·a(N30)、50kg/hm~2·a(N50)、100kg/hm~2·a(N100)4个氮素(NH_4NO_3)水平,开展水氮交互试验。结果表明:在21个月的分解过程中,无芒隐子草分解速率快于冷蒿。同一分解时间同水分处理,氮沉降促进两种凋落物的分解,CK-N和R-N处理,随施氮水平的增加促进作用先增强后减弱,于N50水平分解最快,分解50%所需时间为2.15a、2.45a和2.37a、2.69a,分解95%需要9.99a、11.37a和10.75a、12.24a;W-N处理,促进作用随施氮水平的增加而增强,于N100水平分解最快,分解50%所需时间为1.87a和2.23a,分解95%需要8.84a和10.30a。同一分解时间同氮素水平,增雨促进凋落物分解。相关分析表明:凋落物分解速率与初始全氮含量呈正相关,与初始全碳、纤维素、C/N、木质素、木质素/N和纤维素/N呈负相关。
英文摘要	To explore the effects of water and nitrogen manipulation on the litter decomposition of two dominant species, Cleistogenes songorica and Artemisia frigida in a desert grassland, the water and nitrogen interaction test in three levels of water treatments: natural rainfall(CK),increased rainfall of 30%(W) and reduced rainfall of 30%(R) and four levels of nitrogen(NH_4NO_3) treatment:0(N0),30kg/hm~2·a(N30),50kg/hm~2·a(N50) and 100kg/hm~2·a(N100)level was designed. The results showed that in 21 months of decomposition,the decomposition rate of Cleistogenes songorica was faster than Artemisia frigida.With the same decomposition time and water treatment,nitrogen deposition promoted the litter decomposition,whereas the promotion effect of Cleistogenes songorica and Artemisia frigida was increased first and then weakened with increasing the nitrogen application level under the treatments of CK-N and R-N.In addition,the decomposition rate reached the maximum at N50 level.The required time for the decomposition of 50% was 2.15a,2.45a,2.37a and 2.69a,respectively,and the decomposition of 95% required 9.99a,11.37a,10.75a and 12.24a.Under W-N treatment,the promotion effect was enhanced with the increasing of nitrogen application level.The decomposition achieved the fastest rate at N100 level,and the decomposition time was 1.87a and 2.23a for 50% decomposition and 8.84a and 10.30a for 95% decomposition,respectively.With the same decomposition time and nitrogen level,the increase of rainfall promoted the litter decomposition. The correlation analysis showed that there were positive correlations between the litter decomposition rate and the initial total nitrogen content,and negative correlations with the initial total carbon, cellulose, C/N, lignin, lignin/N and cellulose/N.
中文关键词	荒漠草原 ; 凋落物分解 ; 水分处理 ; 氮素处理 ; 初始化学含量
英文关键词	Desert grassland Litter decomposition Water treatment Nitrogen treatment Initial chemical content
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:6342785
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238664
作者单位	1.内蒙古农业大学草原与资源环境学院, 呼和浩特, 内蒙古 010011, 中国; 2.内蒙古农业大学草原与资源环境学院;;内蒙古自治区土壤质量与养分资源重点实验室, ;;内蒙古自治区土壤质量与养分资源重点实验室, 呼和浩特;;呼和浩特, 内蒙古;;内蒙古 010011;;010011, 中国
推荐引用方式 GB/T 7714	霍利霞,红梅,赵巴音那木拉,等. 水氮控制对荒漠草原凋落物分解的影响[J]. 内蒙古农业大学,2018,40(5):57-63.
APA	霍利霞,红梅,赵巴音那木拉,高海燕,&叶贺.(2018).水氮控制对荒漠草原凋落物分解的影响.中国草地学报,40(5),57-63.
MLA	霍利霞,et al."水氮控制对荒漠草原凋落物分解的影响".中国草地学报 40.5(2018):57-63.