S. Ramos, Renato Alves Teixeira, R. S. Guedes, Markus Gastauer, Sâmia Nunes, C. Caldeira, E. C. S. Silva Junior, P. Souza-Filho
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引用次数: 0
摘要
亚马逊地区的再造林计划强调利用该地区的原生物种。然而,利用本地物种重新造林需要生产高质量的幼苗。摘要本研究旨在评价亚马孙地区具有造林潜力的原生植物paric (Schizolobium parahyba var. amazonicum)幼苗的发育和质量。我们进行了一个温室试验,对幼苗进行了不同基质中主要和微量营养素含量的处理,并评估了对功能属性(株高、茎粗、比叶面积、茎和根干物质)和生理反应(叶绿素a、b和类胡萝卜素浓度)的影响。结果表明,营养遗漏对颗粒幼苗生长有显著影响。综合生物计量和生理指标,幼苗对N、P、K、微量元素、Mg和S的营养需求最高,而在缺乏Ca的情况下,幼苗质量保持不变。总体而言,该物种表现出有效利用速效养分的能力,在低浓度碱基土壤中具有生长潜力。因此,为了生产优质颗粒苗,需要添加主要元素和微量元素,石灰是必不可少的,但在Ca省略下的良好幼苗表现表明,不需要在土壤中添加该元素。
Nutrient requirements of paricá (Schizolobium parahyba var. amazonicum): optimizing seedling quality for reforestation programs
ABSTRACT Amazonian reforestation programs emphasize the use of species native to the region. However, reforestation using native species requires the production of high-quality seedlings. The present study aimed to evaluate the development and quality of seedlings of paricá (Schizolobium parahyba var. amazonicum), a species native to the Amazon with high potential for reforestation activities. We carried out a greenhouse experiment in which seedlings were subjected to treatments with varying presence of major and micronutrients in the substrate, and evaluated the effect on functional attributes (plant height, stem diameter, specific leaf area, shoot and root dry matter) and physiological response (chlorophyll a, b and carotenoid concentrations). Our results showed that nutrient omission significantly affects paricá seedling growth. Considering the assessed biometric and physiological variables, the highest nutritional requirements of seedlings were for N, P, K, micronutrients, Mg and S, while seedling quality was maintained in the absence of Ca. Overall, this species shows efficient use of available nutrients and potential for growth in soils with low concentrations of bases. Therefore, for the production of high-quality paricá seedlings, major and micronutrients should be added and lime is essential, but the good seedling performance under Ca omission suggested that this element does not need to be added to the soil.
期刊介绍:
Acta Amzonica is a multidisciplinary, peer-reviewed, open access, free-of-charge scientific journal for research in and about the Amazon region, published since 1971 by the Instituto Nacional de Pesquisas da Amazônia - INPA, in Brazil.
The journal publishes quarterly issues containing articles and short communications in English across a broad range of disciplines, including Agronomy and Forestry, Animal Sciences and Fisheries, Biodiversity and Conservation, Biotechnology, Chemistry and Pharmacology, Environmental Sciences, Food Sciences, Geosciences, Health Sciences, Human and Social Sciences, and Materials Technology.