干旱区生态环境知识资源中心(Arid): Plant Photosynthesis and Dry Matter Accumulation Response of Sweet Pepper to Water-Nitrogen Coupling in Cold and Arid Environment

Arid

DOI	10.3390/w15112134
	Plant Photosynthesis and Dry Matter Accumulation Response of Sweet Pepper to Water-Nitrogen Coupling in Cold and Arid Environment
	Zhang, Hengjia; Wang, Yong; Yu, Shouchao; Zhou, Chenli; Li, Fuqiang; Chen, Xietian; Liu, Lintao; Wang, Yingying
通讯作者	Zhang, HJ
来源期刊	WATER
EISSN	2073-4441
出版年	2023
卷号	15 期号:11
英文摘要	In order to optimize the water and nitrogen management mode and realize the efficient scale production of sweet pepper, from 2021 to 2022, field experiments on sweet pepper cultivation with different water and nitrogen coupling modes were conducted in the Hexi Oasis irrigation areas. The regulation effects of the water-nitrogen coupling mode on the dry matter accumulation characteristics, photosynthesis, yield, and water-nitrogen utilization efficiency of sweet pepper were further discussed. Irrigation was set for full irrigation (W1, 75-85% FC [field capacity]), mild (W2, 65-75% FC), and moderate (W3, 55-65% FC) water deficit levels. Three levels of nitrogen were applied, high (N1, 300 kg center dot ha(-1)), medium (N2, 225 kg center dot ha(-1)) and low (N3, 150 kg center dot ha(-1)), with full irrigation and no nitrogen application used as the control (CK). The results showed that the appropriate water-nitrogen coupling mode could enhance the photosynthetic rate, increase dry matter accumulation and the accumulation rate, advance the days of a maximum rate of dry matter accumulation, and improve yield and water-nitrogen utilization efficiency. N1W1 had the greatest dry matter accumulation, the mean rate and the maximum increase rate of dry matter accumulation in sweet pepper, which was not a significant difference from N2W2, but significantly increased by 19.61%, 19.67%, and 23.45%, respectively, compared with CK. Water deficit significantly advanced the days of a maximum rate of dry matter accumulation. The days of a maximum rate of dry matter accumulation appeared 1.18-5.79 days earlier at W3 than at W2 and W1, and the maximum rate appeared gradually later with increasing irrigation. The net photosynthetic rate, the transpiration rate, and stomatal conductance of N2W2 sweet pepper showed the best performance at all growth stages, significantly increasing by 23.87%, 27.71%, and 27.39%, respectively, compared with CK. Moreover, the Intercellular CO2 concentration was significantly reduced by 14.77% in N2W2 compared to CK. The N2W2 had the highest yield, water use efficiency, and irrigation water use efficiency of sweet pepper, significantly increasing 26.89%, 33.74%, and 31.22% compared to CK. Excessive water and nitrogen dosage reduced nitrogen partial factor productivity, while an appropriate increase in irrigation under reduced nitrogen conditions facilitated the water nitrogen potential. Passage path analysis further showed that water-nitrogen coupling promotes plant biomass formation and distribution by increasing photosynthetic assimilation capacity, ultimately increasing yield. Therefore, the N2W2 treatment (65-75% FC, 225 kg center dot ha(-1)) is the ideal water and nitrogen mode for obtaining higher yields and water and nitrogen use efficiency of sweet pepper in a cold and arid environment.
英文关键词	water and nitrogen coupling photosynthesis dry matter accumulation characteristics water and nitrogen utilization efficiency sweet pepper
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001005008700001
WOS关键词	MICROBIAL COMMUNITY STRUCTURE ; USE EFFICIENCY ; WINTER-WHEAT ; DEFICIT IRRIGATION ; YIELD ; MAIZE ; FERTILIZATION ; STRESS ; GROWTH
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/399034
推荐引用方式 GB/T 7714	Zhang, Hengjia,Wang, Yong,Yu, Shouchao,et al. Plant Photosynthesis and Dry Matter Accumulation Response of Sweet Pepper to Water-Nitrogen Coupling in Cold and Arid Environment[J],2023,15(11).
APA	Zhang, Hengjia.,Wang, Yong.,Yu, Shouchao.,Zhou, Chenli.,Li, Fuqiang.,...&Wang, Yingying.(2023).Plant Photosynthesis and Dry Matter Accumulation Response of Sweet Pepper to Water-Nitrogen Coupling in Cold and Arid Environment.WATER,15(11).
MLA	Zhang, Hengjia,et al."Plant Photosynthesis and Dry Matter Accumulation Response of Sweet Pepper to Water-Nitrogen Coupling in Cold and Arid Environment".WATER 15.11(2023).