Nitrogen Fertilisation Modulates Photosynthetic Performance and Antioxidant Defence Mechanisms in Intercropped Cactus Under Semi-Arid Conditions

Agriculture in semi-arid regions faces challenges, such as water scarcity and low soil fertility, making the forage cactus a highly important crop due to its crassulacean acid metabolism (CAM) pathway. The productivity of the forage cactus, however, depends on proper water and nutrient management, especially nitrogen. Despite its importance, there is little research into the effects of nitrogen fertilisation on productive, photochemical, physiological and biochemical parameters, or on intercropping systems. Increasing doses of nitrogen are assumed to enhance CAM pathway, improving productivity, gas exchange, photochemical efficiency and antioxidant accumulation, in addition to mitigating the effects of oxidative stress under adverse conditions. The experiment was conducted in Serra Talhada, Pernambuco, Brazil, in a randomised block design with four replications. Changes in the biometric, productive, photochemical, physiological and biochemical parameters were evaluated in forage cactus intercropped with sorghum (<i>Sorghum bicolor</i>) or pigeon pea (<i>Cajanus cajan</i>) subjected to different doses of nitrogen (0, 75, 150, 300 and 450 kg ha<sup>-1</sup>). The results showed that nitrogen fertilisation promoted a higher photosynthetic rate and greater stomatal conductance, increased transpiration, and higher levels of pigment and soluble proteins, in addition to reducing lipid peroxidation. Our findings revealed that the cactus-pigeon pea intercropping system has better photosynthetic, enzymatic and productive performance at a dose of 150 kg N ha<sup>-1</sup>, whereas the cactus-sorghum intercropping system required 450 kg N ha<sup>-1</sup> to achieve similar results. Overall, proper nitrogen management in intercropping systems can optimise the physiological performance and productivity of the forage cactus in semi-arid environments.

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Journal
Plants
Published
2025-12-17
DOI
https://doi.org/10.3390/plants14243841
Primary Topic
Botanical Research and Applications
Type
article
Field-Weighted Citation Impact
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article

Nitrogen Fertilisation Modulates Photosynthetic Performance and Antioxidant Defence Mechanisms in Intercropped Cactus Under Semi-Arid Conditions

Xuguang Tang, Sérgio Luiz Ferreira‐Silva, Jiaoyue Wang, Adriano do Nascimento Simões et al.
Plants
Botanical Research and Applications
article

Nitrogen Fertilisation Modulates Photosynthetic Performance and Antioxidant Defence Mechanisms in Intercropped Cactus Under Semi-Arid Conditions

Xuguang Tang, Sérgio Luiz Ferreira‐Silva, Jiaoyue Wang, Adriano do Nascimento Simões, Luciana Sandra Bastos de Souza, Lara Rosa de Lima e Silva, Carlos André Alves de Souza, Pedro Paulo Santos de Souza, Hugo Rafael Bentzen Santos, Lady Daiane Costa de Sousa Martins, Wilma Roberta dos Santos, Cléber Pereira Alves, Agda Raiany Mota dos Santos, Thieres George Freire da Silva, Alexandre Maniçoba da Rosa Ferraz Jardim, Elania Freire da Silva, José Edson Florentino de Morais, Wagner Martins dos Santos, João L. M. P. de Lima, José Francisco da Cruz Neto
article en

Abstract

Agriculture in semi-arid regions faces challenges, such as water scarcity and low soil fertility, making the forage cactus a highly important crop due to its crassulacean acid metabolism (CAM) pathway. The productivity of the forage cactus, however, depends on proper water and nutrient management, especially nitrogen. Despite its importance, there is little research into the effects of nitrogen fertilisation on productive, photochemical, physiological and biochemical parameters, or on intercropping systems. Increasing doses of nitrogen are assumed to enhance CAM pathway, improving productivity, gas exchange, photochemical efficiency and antioxidant accumulation, in addition to mitigating the effects of oxidative stress under adverse conditions. The experiment was conducted in Serra Talhada, Pernambuco, Brazil, in a randomised block design with four replications. Changes in the biometric, productive, photochemical, physiological and biochemical parameters were evaluated in forage cactus intercropped with sorghum (<i>Sorghum bicolor</i>) or pigeon pea (<i>Cajanus cajan</i>) subjected to different doses of nitrogen (0, 75, 150, 300 and 450 kg ha<sup>-1</sup>). The results showed that nitrogen fertilisation promoted a higher photosynthetic rate and greater stomatal conductance, increased transpiration, and higher levels of pigment and soluble proteins, in addition to reducing lipid peroxidation. Our findings revealed that the cactus-pigeon pea intercropping system has better photosynthetic, enzymatic and productive performance at a dose of 150 kg N ha<sup>-1</sup>, whereas the cactus-sorghum intercropping system required 450 kg N ha<sup>-1</sup> to achieve similar results. Overall, proper nitrogen management in intercropping systems can optimise the physiological performance and productivity of the forage cactus in semi-arid environments.

PlantsVol. 14(24)
Hangzhou Normal University (CN), Chinese Academy of Sciences (CN), Universidade Federal de Pernambuco (BR), Institute of Applied Ecology (CN), Universidade Estadual do Maranhão (BR), Universidade Federal Rural de Pernambuco (BR), University of Coimbra (PT), Universidade Federal Rural do Semi-Árido (BR), Universidade Estadual Paulista (Unesp) (BR)
Fundação de Amparo à Pesquisa do Estado de São Paulo, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Universidade de Coimbra, Fundação de Amparo à Ciência e Tecnologia do Estado de Pernambuco, Universidade de Pernambuco
Openalex Percentile: Top 54%
Botanical Research and Applications
DOIOpen Access PDFOpenAlex
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