Yak dung pat fragmentation affects its carbon and nitrogen leaching in Northern Tibet, China

doi:10.1016/j.agee.2021.107301

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Yak dung pat fragmentation affects its carbon and nitrogen leaching in Northern Tibet, China
	Du, Ziyin 1,5; Wang, Xiaodan 5; Xiang, Jian 4; Wu, Yong 1; Zhang, Bin 1; Yan, Yan 5; Zhang, Xiaoke 3; Cai, Yanjiang 2
刊名	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
	2021-04-15
卷号	310 页码:9
关键词	Yak Dung pat fragmentation Dissolved organic carbon Nutrient cycling Qinghai-Tibetan Plateau
ISSN号	0167-8809
DOI	10.1016/j.agee.2021.107301
通讯作者	Cai, Yanjiang(yjcai@zafu.edu.cn)
英文摘要	The dung excreted by yaks (Bos grunniens) into alpine grasslands on the Qinghai-Tibetan Plateau is an important ecological pathway for returning organic matter and nutrients that are closely linked to soil fertility and grassland productivity. However, few previous studies have investigated the dynamics of carbon (C) and nitrogen (N) associated with yak dung pats, particularly with respect to C and N leaching. This study experimentally investigated the effects of yak dung pat fragmentation on its C and N dynamics in Northern Tibet. Four treatments were examined: a full-size dung pat (control, FDP) and respectively splitting the full-size dung pat into four (1/4FDP), eight (1/8FDP), and sixteen (1/16FDP) equal-sized pats, each within an identical leaching device and had three replicates. The results showed that fragmentation did not influence (P > 0.05) dung total organic C (TOC) and N (TN) concentrations, but it did cause a decrease (P < 0.05) in both ammonium-N (NH4+-N) and nitrate-N (NO3--N) concentrations and also reduced the loss of dry matter (P < 0.05), after 72 days of dung decomposition. Cumulative amounts of dissolved organic C (DOC) and N (DON) leached from the dung were significantly higher in the three fragmentation treatments than in the control (respectively 2.46-3.50 vs. 1.64 g C chamber(-1), 0.14-0.16 vs. 0.10 g N chamber(-1); P < 0.05). However, fragmentation did not always decrease cumulative dung NH4+-N and NO3--N leaching, and neither NH4+-N nor NO3--N leaching (P > 0.05) were affected by the 1/4FDP treatment. The DOC leaching accounted for 1.58-3.36 % of the initial dung TOC input, while the DON, NH4+-N, and NO3--N leaching respectively accounted for 2.34-3.82 %, 0.68-0.87 %, and 0.19-0.27 % of the initial dung TN input. In conclusion, our findings suggest that yak dung pat fragmentation can increase the leaching of DOC and DON and the heavily fragmenting can decrease the leaching of both NH4+-N and NO3--N after short-term dung decomposition in Northern Tibet.
资助项目	National Natural Science Foundation of China[41807109] ; National Natural Science Foundation of China[41877085] ; National Natural Science Foundation of China[41573070] ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK0404] ; National general cultivation project of China West Normal University[17E042] ; National general cultivation project of China West Normal University[18B016]
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000615985000010
资助机构	National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National general cultivation project of China West Normal University
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/55940]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Cai, Yanjiang
作者单位	1.China West Normal Univ, Sch Land & Resources, Nanchong 637009, Peoples R China 2.Zhejiang A&F Univ, State Key Lab Subtrop Silviculture, Hangzhou 311300, Peoples R China 3.Hohai Univ, Sch Publ Adm, Nanjing 210098, Peoples R China 4.Nanjing Forestry Univ, Coll Forestry, Nanjing 210037, Peoples R China 5.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China
推荐引用方式 GB/T 7714	Du, Ziyin,Wang, Xiaodan,Xiang, Jian,et al. Yak dung pat fragmentation affects its carbon and nitrogen leaching in Northern Tibet, China[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2021,310:9.
APA	Du, Ziyin.,Wang, Xiaodan.,Xiang, Jian.,Wu, Yong.,Zhang, Bin.,...&Cai, Yanjiang.(2021).Yak dung pat fragmentation affects its carbon and nitrogen leaching in Northern Tibet, China.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,310,9.
MLA	Du, Ziyin,et al."Yak dung pat fragmentation affects its carbon and nitrogen leaching in Northern Tibet, China".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 310(2021):9.