干旱区生态环境知识资源中心(Arid): 封育年限对伊犁绢蒿荒漠土壤有机氮组分的影响

Arid

	封育年限对伊犁绢蒿荒漠土壤有机氮组分的影响
其他题名	Effects of grazing exclusion length on soil organic nitrogen in Seriphidium transiliense desert
	杨静 1; 孙宗玖 2; 董乙强 1
来源期刊	草业科学
ISSN	1001-0629
出版年	2017
卷号	34 期号:9 页码:1778-1786
中文摘要	为探究荒漠土壤有机氮组分对封育年限的响应规律,研究了不同封育年限(封育时间为0、1、4和11 a)对中度退化伊犁绢蒿(Seriphidium transiliense)荒漠草地土壤全氮(total nitrogen,TN)、轻组氮(light fraction organic nitrogen, LFON)、颗粒氮(particulate organic nitrogen,PON)、微生物量氮(soil microbial biomass nitrogen,SMBN)及其分配比例的影响。结果表明,与封育0 a相比,其它封育年限510、1020、3050 cm 土层的TN含量均显著降低(P<0.05),且0 50 cm 土层TN含量随封育年限延长呈降一升趋势;封育11 a,0 5 cm 土层PON含量达到最高,而封育4 a, 510和20 30 cm 土层PON分配比例显著增加;0 20 cm 土层LFON含量增加显著,且0 5 cm 土层含量最高。0-50 cm 土层SMBN随封育年限增加呈降一升趋势,而封育4 a,5-10和20 30 cm 土层SMBN分配比例显著高于封育0 a和封育1 a(P<0.05) ;0 10 cm 土层LFON和0 50 cm 土层LFONR与封育年限呈显著正相关。总之,短期封育(1~11 a)下,中度退化伊犁绢蒿荒漠土壤全氮含量仍未得到恢复,但促进了 LFON、PON、SMBN及其分配比例的增加。
英文摘要	To explore the effects of different grazing exclusion lengths on soil organic nitrogen, we studied total soil nitrogen, particulate organic nitrogen, light fraction organic nitrogen, soil microbial biomass nitrogen and their distribution ratios in a moderately degraded Seriphidium transiliense desert. The influence of different grazing exclusion lengths on the percentage of soil organic nitrogen was researched using a control, one grazing-exclusion year, four grazing-exclusion years and eleven grazing-exclusion years. Compared with the control, the content of total soil nitrogen significantly decreased in 5 10,10 20 and 30 50 cm of soil depth and the content of total nitrogen in 0 50 cm of soil depth appeared first to decrease then increased with the increase in grazing-exclusion years. The particulate organic nitrogen was highest in 0 5 cm of soil depth after eleven grazing-exclusion years, with a significant increase in the accumulation of particulate organic nitrogen distribution ratios in soil depths of 5 10 and 20 30 cm. Light fraction organic nitrogen significantly increased in 0 20 and 0 5 cm of soil depth, while it reached the highest after four grazing-exclusion years. The soil microbial biomass nitrogen appeared first to decrease then increased in 0 50 cm of soil depth. Comparing four grazing-exclusion years with the control and one grazing-exclusion year, soil microbial biomass nitrogen distribution ratio significantly increased in 5 10 cm and 20 30 cm of soil depth. Correlation among grazing-exclusion years with light fraction organic nitrogen in 0 10 cm of soil depth and light fraction organic nitrogen distribution ratio in 0 50 cm of soil depth was significantly positive. In conclusion, the content of total soil nitrogen was not recovered ,but light fraction organic nitrogen, particulate organic nitrogen, soil microbial biomass nitrogen and their distribution ratios increased after short-term grazing exclusion (1~11 a) in moderately degraded S. transiliense desert.
中文关键词	封育年限 ; 伊犁绢蒿荒漠 ; 土壤颗粒氮 ; 轻组氮 ; 微生物生物量氮
英文关键词	grazing exclusion length Seriphidium transiliense desert soil particulate organic nitrogen light fraction organic nitrogen soil microbial biomass nitrogen
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:6069441
来源机构	新疆农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235679
作者单位	1.新疆农业大学草业与环境科学学院, 乌鲁木齐, 新疆 830052, 中国; 2.新疆农业大学草业与环境科学学院, 新疆草地资源与生态自治区重点实验室, 乌鲁木齐, 新疆 830052, 中国
推荐引用方式 GB/T 7714	杨静,孙宗玖,董乙强. 封育年限对伊犁绢蒿荒漠土壤有机氮组分的影响[J]. 新疆农业大学,2017,34(9):1778-1786.
APA	杨静,孙宗玖,&董乙强.(2017).封育年限对伊犁绢蒿荒漠土壤有机氮组分的影响.草业科学,34(9),1778-1786.
MLA	杨静,et al."封育年限对伊犁绢蒿荒漠土壤有机氮组分的影响".草业科学 34.9(2017):1778-1786.