干旱区生态环境知识资源中心(Arid): Late nitrogen fertilization increases biomass of cotton bolls by reinforcing source-sink performance

Arid

DOI	10.1016/j.indcrop.2023.117663
	Late nitrogen fertilization increases biomass of cotton bolls by reinforcing source-sink performance
	Tian, Yu; Shi, Xiaojuan; Shi, Feng; Zhang, Hongxia; Liang, Qi; Luo, Honghai; Chenu, Karine
通讯作者	Luo, HH
来源期刊	INDUSTRIAL CROPS AND PRODUCTS
ISSN	0926-6690
EISSN	1872-633X
出版年	2023
卷号	206
英文摘要	The decrease in reproductive organ biomass is a principal constraint for cotton yield under conditions of limited nitrogen (N). We aimed to alleviate this challenge by reasoning N applications in order to exploit the photosynthetic potential and improve the distribution of photosynthates. Cotton crops were grown in a two-year field experiment (2019-2020) under N-reduced cultivation (23.9 x104 plants ha -1, 76 cm row spacing, and applied 240 kg N ha -1), N fertigated with five ratios at squaring (SQ): flowering to peak boll (FPB): late peak boll (LPB), i.e., 4:6:0 (N460), 3:6:1 (N361), 2:6:2 (N262, Control), 1:6:3 (N163) and 0:6:4 (N064). Impacts of N treatment (ratio) were investigated for leaf area, chlorophyll content, photosynthetic characteristics, photosynthetic N use efficiency (PNUE), sink capacity characteristics, and biomass accumulation. Correlations between traits were also analyzed. Compared with conventional N262, N064 increased reproduction organs biomass by 10.1-10.3%. Furthermore, during the LPB to boll opening stage, N064 increased fruit branch leaf area by 1.4-26.8%, chlorophyll content by 6.4-27.6%, net photosynthetic rate by 15.1-35.9%, actual photosynthetic efficiency by 14.4-41.6%, photochemical quenching by 18.0-57.7%, PNUE by 15.7-41.0%, and sink capacity by 6.7-10.5%; while it decreased foliage branch leaf area by 13.1-22.4% and chlorophyll a/b by 6.1-10.2%. Overall, late N fertilization was an effective strategy to (1) retain post-flowering photosynthetic capacity by developing more fruit branch leaf area with higher chlorophyll content and lower chlorophyll a/b, (2) optimize source-sink relationship by increasing boll capacity, and (3) increase biomass in reproductive organs, thus enhancing sustainable and efficient production of cotton under N-reduced cultivation in arid regions.
英文关键词	Cotton N-reduced cultivation Leaf function Photosynthetic physiology Boll capacity Biological yield
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001101608400001
WOS关键词	WATER-USE EFFICIENCY ; DRY-MATTER ACCUMULATION ; GLOBAL FOOD DEMAND ; PLANT-DENSITY ; LEAF SENESCENCE ; PHOTOSYNTHETIC CAPACITY ; UP-REGULATION ; WINTER-WHEAT ; GRAIN-YIELD ; IMPROVES
WOS类目	Agricultural Engineering ; 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/2XILL650/396937
推荐引用方式 GB/T 7714	Tian, Yu,Shi, Xiaojuan,Shi, Feng,et al. Late nitrogen fertilization increases biomass of cotton bolls by reinforcing source-sink performance[J],2023,206.
APA	Tian, Yu.,Shi, Xiaojuan.,Shi, Feng.,Zhang, Hongxia.,Liang, Qi.,...&Chenu, Karine.(2023).Late nitrogen fertilization increases biomass of cotton bolls by reinforcing source-sink performance.INDUSTRIAL CROPS AND PRODUCTS,206.
MLA	Tian, Yu,et al."Late nitrogen fertilization increases biomass of cotton bolls by reinforcing source-sink performance".INDUSTRIAL CROPS AND PRODUCTS 206(2023).