干旱区生态环境知识资源中心(Arid): Photophysiological Mechanism of Dense Planting to Increase the Grain Yield of Intercropped Maize with Nitrogen-Reduction Application in Arid Conditions

Arid

DOI	10.3390/agronomy12122994
	Photophysiological Mechanism of Dense Planting to Increase the Grain Yield of Intercropped Maize with Nitrogen-Reduction Application in Arid Conditions
	Fan, Hong; Yin, Wen; Zhao, Cai; Yu, Aizhong; Fan, Zhilong; Hu, Falong; Zhang, Jindan; Chai, Qiang
通讯作者	Chai, Q
来源期刊	AGRONOMY-BASEL
EISSN	2073-4395
出版年	2022
卷号	12 期号:12
英文摘要	Leaf photophysiological characteristics are the main indexes that determine crop yield formation. However, it remains unclear whether photosynthesis is systematically regulated via the cropping pattern and nitrogen supply when maize crops are planted with a high density. So, a field experiment that had a three-factor split-plot arrangement of treatments was conducted from 2020 to 2021. The main plot was two cropping patterns that included the sole cropping of maize and wheat-maize intercropping. The split plot had two nitrogen application rates: a traditional nitrogen application rate (N2, 360 kg ha(-1)) and one reduced by 25% (N1, 270 kg ha(-1)) for maize. The split-split plot had three planting densities: a traditional density (M1, 78,000 plant ha(-1)), a medium density (M2, 10,400 plant ha(-1)), and a high density (M3, 129,000 plant ha(-1)) for sole maize; the corresponding densities of intercropped maize were 45,000, 60,000, and 75,000 plant ha(-1), respectively. The grain yield, the photosynthetic traits, and chlorophyll a fluorescence of the maize were assessed. The results showed that a 25% nitrogen reduction and dense planting had a negative impact on the individual maize's photosynthesis. However, intercropping could alleviate these drawbacks. When the maize was grown in the intercropping system at a lower nitrogen level and a medium planting density (IN1M2), the photosynthetic traits were better or similar to those of the traditional treatment (SN2M1) at the reproductive growth stage. Moreover, IN1M2 improved the light energy distribution among photochemistry, photo-protective and heat dissipation process of maize compared with SN2M1. A grey relation analysis demonstrated that the Pn and Tr of the individual maize played the most significant role in the group's productivity. Thus, the IN1M2 treatment achieved the highest grain yield and can be recommended as a feasible agronomic practice in oasis-irrigated regions.
英文关键词	intercropping nitrogen level photosynthetic traits yield performance oasis-irrigated regions
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:000900421500001
WOS关键词	HIGH-LIGHT ; PHOTOSYNTHETIC CHARACTERISTICS ; CHLOROPHYLL FLUORESCENCE ; SYSTEMIC REGULATION ; POPULATION DENSITY ; DROUGHT TOLERANCE ; WHEAT/MAIZE ; CHLOROPLASTS ; INTERCEPTION ; PERFORMANCE
WOS类目	Agronomy ; Plant Sciences
WOS研究方向	Agriculture ; Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/391793
推荐引用方式 GB/T 7714	Fan, Hong,Yin, Wen,Zhao, Cai,et al. Photophysiological Mechanism of Dense Planting to Increase the Grain Yield of Intercropped Maize with Nitrogen-Reduction Application in Arid Conditions[J],2022,12(12).
APA	Fan, Hong.,Yin, Wen.,Zhao, Cai.,Yu, Aizhong.,Fan, Zhilong.,...&Chai, Qiang.(2022).Photophysiological Mechanism of Dense Planting to Increase the Grain Yield of Intercropped Maize with Nitrogen-Reduction Application in Arid Conditions.AGRONOMY-BASEL,12(12).
MLA	Fan, Hong,et al."Photophysiological Mechanism of Dense Planting to Increase the Grain Yield of Intercropped Maize with Nitrogen-Reduction Application in Arid Conditions".AGRONOMY-BASEL 12.12(2022).