干旱区生态环境知识资源中心(Arid): Optimizing field management to promote the ecologicalization of agriculture in loess hilly-gully region, China

Arid

DOI	10.1007/s11442-023-2119-5
	Optimizing field management to promote the ecologicalization of agriculture in loess hilly-gully region, China
	Huang, Yunxin; Li, Yurui; Liu, Yansui
通讯作者	Liu, YS
来源期刊	JOURNAL OF GEOGRAPHICAL SCIENCES
ISSN	1009-637X
EISSN	1861-9568
出版年	2023
卷号	33 期号:5 页码:1055-1074
英文摘要	Scientific field management is an important path to realize ecological production and sustainable development of agriculture. As the main content of field management, nitrogen (N) management is the key to balance the economic and ecological benefits of agricultural production. In the loess hilly-gully region, for the fragile ecological and social system, ecologicalization of agricultural production is an important direction to promote sustainable agricultural development. However, irrational fertilization has been one of the main constraint factors, hindering the ecologicalization of local agriculture. In order to solve the problem and prove the practical significance of field management to ecologicalization of agriculture, this study aimed at evaluating the effects of different N fertilization rates and timing using Root Zone Water Quality Model (RZWQM) and then optimizing the N management. Experiments were conducted from 2018 to 2019 in Yangjuangou watershed, loess hilly-gully region, to calibrate and validate the model. The root mean square error (RMSE) of soil water content, nitrate N concentration, above-ground biomass, leaf area index ranged from 10.5-13.5 mm, 2.96-3.80 mg center dot kg(-1), 730.3-1273.9 kg center dot ha(-1) and 0.26-0.38, respectively, with the agreement index (d) between observed and simulated values ranging between 0.88 to 0.98. Simulation results showed that N leaching in semi-arid areas was also quite high due to concentrated rainfall and loose soil, which had previously been neglected. When the fertilization rate decreased by 35% (applying the chemical fertilizer at rate of 245.7 kg N ha(-1)) of typical fertilization (applying the chemical fertilizer at rate of 378.0 kg N ha(-1)), the leaching and residual N decreased by 72.2%-75.4% and 35.6%-50.9%, respectively, while NUE increased by 41.5%-45.2% with no reduction in maize yield. Additionally, compared with applying additional N at seedling stage in one batch, applying at seedling and jointing stages in two batches further decreased N leaching and improved NUE. Thus, a 35% reduction of typical fertilization rate combined with applying additional N at seedling and jointing stages is recommended. From the perspective of N management, this study demonstrated optimizing field management can play a positive role in the ecologicalization of agriculture, and more field management measures should be explored.
英文关键词	field management nitrogen fertilization ecologicalization of agriculture gully agriculture loess hilly-gully region
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000980419400008
WOS关键词	WATER-USE EFFICIENCY ; FERTILIZATION MANAGEMENT ; CROPPING SYSTEM ; N FERTILIZATION ; NITROGEN ; QUALITY ; YIELD ; MODEL ; RICE ; ROTATION
WOS类目	Geography, Physical
WOS研究方向	Physical Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397341
推荐引用方式 GB/T 7714	Huang, Yunxin,Li, Yurui,Liu, Yansui. Optimizing field management to promote the ecologicalization of agriculture in loess hilly-gully region, China[J],2023,33(5):1055-1074.
APA	Huang, Yunxin,Li, Yurui,&Liu, Yansui.(2023).Optimizing field management to promote the ecologicalization of agriculture in loess hilly-gully region, China.JOURNAL OF GEOGRAPHICAL SCIENCES,33(5),1055-1074.
MLA	Huang, Yunxin,et al."Optimizing field management to promote the ecologicalization of agriculture in loess hilly-gully region, China".JOURNAL OF GEOGRAPHICAL SCIENCES 33.5(2023):1055-1074.