One way to reduce mineral fertilizers is to use alternative fertilizers instead, such as the byproducts from the food industry. In the present study we evaluated the effects of sugarcane bagasse ash on the physiology, growth, and development of sunflowers (Helianthus annuus L.). We conducted an experiment in a greenhouse using a completely randomized design with two sunflower cultivars (Multissol and Catissol), five sugarcane bagasse ash doses (0.0, 3.125, 4.687, 6.25, and 7.812 mg ha-1), and 5 replicates. At 85 days after planting we determined the plant height; leaf number; stem diameter; internal and external diameter of the flower chapter; leaf area index; shoot dry weight; net assimilation rate; dry mass production rate; relative and absolute growth rate; extravasation of electrolytes; relative water content; photosynthetic pigments (chlorophyll a, b, carotenoids, and the chlorophyll a/b ratio); and soluble carbohydrates, proteins, and proline. The height, number of leaves, and shoot dry mass increased due to the availability of nutrients contained in the ash. The incorporation of ash into the soil increased the photosynthetic activity (chlorophyll a and b) of both sunflower cultivars. The diameter of the stem, leaf area index, and relative growth rate of both sunflower cultivars increased with increasing ash dose. Therefore, the ash can be used as an alternative fertilizer, complementing or replacing mineral fertilizers.

该杂志发表农学所有领域的原创文章，包括土壤科学、农业昆虫学、土壤肥力和肥料、土壤物理学、栽培植物生理学、植物病理学、植物健康、植物技术、成因、形态和土壤分类、管理和保护土壤、植物病虫害综合治理、植物改良、农业微生物学、农业寄生虫学、种子生产和加工。

The journal "Acta Scientiarum - Agronomy" publishes original research articles in all fields of agronomy, including soil science, agricultural entomology, soil fertility and fertilization, soil physics, crop physiology, plant pathology, plant health, plant technology, soil genesis, morphology and classification, soil management and conservation, integrated pest management, plant breeding, agricultural microbiology, agricultural parasitology, and seed production and processing.

《Acta Scientiarum - Agronomy》杂志发表农学各个领域的原创研究文章，涵盖土壤科学、农业昆虫学、土壤肥力与施肥、土壤物理学、栽培植物生理学、植物病理学、植物健康、植物技术、土壤的成因、形态与分类、土壤管理与保护、植物病虫害综合治理、植物改良、农业微生物学、农业寄生虫学，以及种子生产与加工等主题。

Category	Quartile
农林科学	4
农林科学, 农艺学	4

Growth and physiology of two sunflower cultivars fertilized with sugarcane bagasse ash

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