干旱区生态环境知识资源中心(Arid): Optimized nitrogen rate, plant density, and irrigation level reduced ammonia emission and nitrate leaching on maize farmland in the oasis area of China

Arid

DOI	10.7717/peerj.12762
	Optimized nitrogen rate, plant density, and irrigation level reduced ammonia emission and nitrate leaching on maize farmland in the oasis area of China
	Asibi, Aziiba Emmanuel; Yin, Wen; Hu, Falong; Fan, Zhilong; Gou, Zhiwen; Yang, Hongwei; Guo, Yao; Chai, Qiang
通讯作者	Chai, Q
来源期刊	PEERJ
ISSN	2167-8359
出版年	2022
卷号	10
英文摘要	Nitrogen fertilizers play a key role in crop production to meet global food demand. Inappropriate application of nitrogen fertilizer coupled with poor irrigation and other crop management practices threaten agriculture and environmental sustainability. Over application of nitrogen fertilizer increases nitrogen gas emission and nitrate leaching. A field experiment was conducted in China's oasis irrigation area in 2018 and 2019 to determine which nitrogen rate, plant density, and irrigation level in sole maize (Zea mays L.) cropping system reduce ammonia emission and nitrate leaching. Three nitrogen rates of urea (46-0-0 of N-P2O5-K2O), at (N-0 = 0 kg N ha(-1), N-1 = 270 kg N ha(-1), and N-2 = 360 kg N ha(-1)) were combined with three plant densities (D-1 = 75,000 plants/ha(-1), D-2 = 97,500 plants/ha(-1), and D-3 = 120,000 plants/ha(-1)) with two irrigation levels (W-1 = 5,250 m(3)/hm(2) and W-2 = 4,740 m(3)/hm(2)) using a randomized complete block design. The results showed that, both the main and interaction effects of nitrogen rate, plant density, and irrigation level reduced nitrate leaching (p < 0.05). In addition, irrigation level x nitrogen rate significantly (p < 0.05) reduced ammonia emission. Nitrate leaching and ammonia emission decreased with higher irrigation level and higher plant density. However, high nitrogen rates increased both nitrate leaching and ammonia emission. The study found lowest leaching (0.35 mg kg(-1)) occurring at the interaction of 270 kg N ha(-1) x 120,000 plants/ha(-1) x 4,740 m(3)/hm(2), and higher plant density of 120,000 plants/ha(-1) combined with 0 kg N ha(-1) and irrigation level of 5,250 m(3)/hm(2) recorded the lowest ammonia emission (0.001 kg N)(-1). Overall, ammonia emission increased as days after planting increased while nitrate leaching decreased in deeper soil depths. These findings show that, though the contributory roles of days after planting, soil depth, amount of nitrogen fertilizer applied and year of cultivation cannot be undermined, it is possible to reduce nitrate leaching and ammonia emission through optimized nitrogen rate, plant density and regulated irrigation for agricultural and environmental sustainability.
英文关键词	Environmental sustainability greenhouse gas nitrogen application sustainable cropping
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000759233000006
WOS关键词	GREENHOUSE-GAS EMISSIONS ; USE EFFICIENCY ; N FERTILIZATION ; SOIL ; WHEAT ; ACCUMULATION ; MANAGEMENT ; SYSTEM ; NORTH ; YIELD
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393924
推荐引用方式 GB/T 7714	Asibi, Aziiba Emmanuel,Yin, Wen,Hu, Falong,et al. Optimized nitrogen rate, plant density, and irrigation level reduced ammonia emission and nitrate leaching on maize farmland in the oasis area of China[J],2022,10.
APA	Asibi, Aziiba Emmanuel.,Yin, Wen.,Hu, Falong.,Fan, Zhilong.,Gou, Zhiwen.,...&Chai, Qiang.(2022).Optimized nitrogen rate, plant density, and irrigation level reduced ammonia emission and nitrate leaching on maize farmland in the oasis area of China.PEERJ,10.
MLA	Asibi, Aziiba Emmanuel,et al."Optimized nitrogen rate, plant density, and irrigation level reduced ammonia emission and nitrate leaching on maize farmland in the oasis area of China".PEERJ 10(2022).