干旱区生态环境知识资源中心(Arid): Optimizing nitrogen application improves its efficiency by higher allocation in bolls of cotton under drip fertigation

Arid

DOI	10.1016/j.fcr.2023.108968
	Optimizing nitrogen application improves its efficiency by higher allocation in bolls of cotton under drip fertigation
	Tian, Yu; Tian, Liwen; Wang, Fangyong; Shi, Xiaojuan; Shi, Feng; Hao, Xianzhe; Li, Nannan; Chenu, Karine; Luo, Honghai; Yang, Guozheng
通讯作者	Luo, HH
来源期刊	FIELD CROPS RESEARCH
ISSN	0378-4290
EISSN	1872-6852
出版年	2023
卷号	298
英文摘要	Context: Nitrogen (N) loss is becoming one of the main limitations for sustainable agricultural production globally, particularly for crops such as cotton. Research question: To alleviate this issue, a promising strategy may be to exploit the N-saving potential of cotton plants by optimizing N application ratios at different growth stages under lower N rate and higher planting density with wide-row spacing. Methods: Two field experiments were carried out to investigate cotton yield, N use efficiency (NUE), N accumulation characteristics, and N-15 uptake and distribution in response to N fertilization. First, a two-year experiment was conducted with N fertilization of either 0, 120, 240, 360 (control) or 480 kg ha(-1). A three-year experiment was then carried out with 240 kg N ha(-1) being applied with different ratios across three periods (squaring, flowering to peak boll, and late peak boll), i.e., 0:6:4 (N-064), 1:6:3 (N-163), 2:6:2 (N-262, control), 3:6:1 (N-361) and 4:6:0 (N-460). Results: Compared with conventional N fertilization (360 kg N ha(-1)), moderate fertilization at 240 kg N ha(-1) resulted in steady and higher seed cotton yields of 5945 and 5603 kg ha(-1) in 2017 and 2018, respectively, and improved NUE by 49.1-53.6%. Compared with conventional N-262, a shift to later N application (N-064) increased both lint yield and partial factor fiber productivity of nitrogen (PFFPN) by 4.4-7.7%, and accumulated 6.1-14.4% more total N (K) in reproductive organs due to higher average (Vt) and maximum (Vm) accumulation rates by 25.2-49.0% and 15.0-48.7%, respectively, while the fast N accumulation period (Delta t) shortened by 15.2-24.4%. N-064 partitioned 15.6% more N-15 to reproductive organs. NUE was significantly positively correlated with K, t(1) (the day when Delta t started), Vt, Vm, Tm (the day on which Vm occurred) and N-15 accumulation in middle and upper canopy bolls, and negatively correlated with Delta t of total N accumulation in reproductive organs. Conclusions: Allocating N from the squaring period to the late peak boll period led to an increase in N uptake during the reproductive growth stage and greater allocation of N to cotton bolls under reduced-N cultivation and drip fertigation. Significance: This N management strategy is a potential way to improve NUE and achieve sustainable and efficient production of cotton in arid areas.
英文关键词	Cotton High-density planting Compensatory effects Nitrogen use efficiency Yield
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001000950400001
WOS关键词	DRY-MATTER ; PLANT-DENSITY ; YIELD ; GROWTH ; WATER ; ROOT ; ACCUMULATION ; POPULATION ; FERTILIZER ; BIOMASS
WOS类目	Agronomy
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396353
推荐引用方式 GB/T 7714	Tian, Yu,Tian, Liwen,Wang, Fangyong,et al. Optimizing nitrogen application improves its efficiency by higher allocation in bolls of cotton under drip fertigation[J],2023,298.
APA	Tian, Yu.,Tian, Liwen.,Wang, Fangyong.,Shi, Xiaojuan.,Shi, Feng.,...&Yang, Guozheng.(2023).Optimizing nitrogen application improves its efficiency by higher allocation in bolls of cotton under drip fertigation.FIELD CROPS RESEARCH,298.
MLA	Tian, Yu,et al."Optimizing nitrogen application improves its efficiency by higher allocation in bolls of cotton under drip fertigation".FIELD CROPS RESEARCH 298(2023).