Ecologically‐Based Practices for Vegetable Crops Production in the Tropics

Valenzuela, Hector

doi:10.1002/9780470650776.ch4

Cited by 2 publications

(1 citation statement)

References 260 publications

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“…It has been well recognized that germplasm diversity exists within vegetable species with respect to nutrient rates and NUE [57] with respect to crops such as okra, pumpkin, and tomato (Table 4) [114]. However, breeding for NUE has not been a component of improvement programs for most crops, likely because it is a complex genetic trait, controlled by multiple genes, and because of the difficulty in managing the many environmental variables that affect N form, movement, and cycles in the farm [46].…”

Section: Crop Improvement For Nuementioning

confidence: 99%

Optimizing the Nitrogen Use Efficiency in Vegetable Crops

Valenzuela

2024

Nitrogen

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Nitrogen (N) is the most limiting nutrient for the production of vegetable crops, but anthropogenic sources pose risks due to its transformation into several reactive forms and movement throughout the environment. The bulk of the N research to date to improve Nitrogen Use Efficiency (NUE) has followed a reductionist factorial approach focused on synthetic N application rates and crop growth response, under monocultures. The increased adoption of diversified cropping systems, organic N sources, and alternative management practices makes it more challenging to unravel N form transformation, movement, and crop uptake dynamics, in time and space. Here, based on a selected review of the recent literature, we propose a holistic approach of nutrient management to highlight key management and production variables as well as multilevel cropping system, genetic, environmental, ecological, and socioeconomic interactions to improve the N cycle and NUE. The best management strategies to improve NUE include both organic and inorganic N rate calibration studies, germplasm selection, crop rotations, identification of nutrient x nutrient interactions, and pest and water management. Agroecological practices that may improve NUE include vegetational diversification in time and space, integrated crop–livestock systems, conservation tillage, organic amendment inputs, legume-based cropping systems, as well as a landscape approach to nutrient management.

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Section: Crop Improvement For Nuementioning

confidence: 99%

Optimizing the Nitrogen Use Efficiency in Vegetable Crops

Valenzuela

2024

Nitrogen

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Optimizing the Nitrogen Use Efficiency in Vegetable Crops

Valenzuela

2023

Preprint

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Nitrogen (N) is the most limiting nutrient for the production of vegetable crops, but anthropogenic sources pose risks due to its transformation into several reactive forms and movement throughout the environment. To mitigate the impact of environmental losses, current research efforts aim to improve management practices to obtain a greater Nutrient Use Efficiency (NUE). From a chemical, biological, and ecophysiological perspective, at a reductionist level we have acquired a considerable mechanistic understanding about the N cycle, the varied N chemical forms, microbial interactions and physiology of crop uptake. However, at a holistic level, we are far from obtaining an adequate understanding of the myriad of multi-level cropping system, genetic, socioeconomic, environmental, and ecological interactions that have an effect on the N cycle and NUE. Here, based on a selected review of the literature, we provide a perspective on the potentials to increase the NUE of vegetable crops, by adopting a range of best management practices and by highlighting some of the N x system interactions that may be considered to better understand the complex dynamics of the N cycle, to optimize the NUE of vegetable crops, and to explore alternatives to the reliance on the use of synthetic N sources.

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Ecologically‐Based Practices for Vegetable Crops Production in the Tropics

Cited by 2 publications

References 260 publications

Optimizing the Nitrogen Use Efficiency in Vegetable Crops

Optimizing the Nitrogen Use Efficiency in Vegetable Crops

Optimizing the Nitrogen Use Efficiency in Vegetable Crops

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