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Bioscience Journal
Article . 2011
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Tolerância do campim marandu a doses de manganês

Authors: Pires Maciel Guirra, Ana Paula; Fiorentin, Ciro Franco; Prado, Renato de Mello; Teixeira Caetano, Mayra Cristina; Felici, Ana Claudia;

Tolerância do campim marandu a doses de manganês

Abstract

O cultivo de pastagens no Brasil é feita na sua maioria com espécies pelo gênero Brachiaria spp., entretanto, são poucas as pesquisas sobre nutrição com manganês para essa forrageira. Objetivou-se avaliar os efeitos das aplicações de manganês no desenvolvimento e na nutrição do capim marandú. O delineamento experimental foi inteiramente casualizado, constituídos de cinco doses de manganês (0, 15, 30, 60 e 120 mg dm-3) e quatro repetições. . Cada unidade experimental foi constituída de vaso preenchido com Latossolo Vermelho distrófico (Mn = 0,6 mg dm-3). Foram realizados dois cortes, o primeiro após 38 dias do transplantio das mudas e o segundo 30 dias após o primeiro corte. Avaliou-se o teor de manganês foliar, massa seca da parte aérea, número de perfilhos e área foliar. As doses de manganês incrementou a sua absorção pela planta, sendo mais de três vezes maior no segundo corte comparado ao primeiro corte. O capim marandú apresentou alta tolerância a toxicidade de manganês, atingindo alto teor foliar na parte aérea próximo de 1000 e 2800 mg de Mn kg-1 no primeiro e segundo corte respectivamente, sem afetar o crescimento da planta.

The cultivation of pastures in Brazil is mostly done with the species Brachiaria spp. However, there is little research on nutrition with manganese for this forage. It was aimed to asses the effects of manganese in the development and nutrition of marandu grass. The experimental design used was fully randomized, consisting of five rates of manganese ( 0, 15, 30, 60 e 120 mg dm(-3)) and four repetitions. The experimental unit was formed in a vase filled with a Red Latosol dystrophic. There were two cuts, the first after 38 days of transplanting seedling and the second 30 days after the first cut. Was evaluated the content of manganese leaf, the dry mass of the shoot, the number of tillers and the leaf area. The levels of manganese increased its accumulation in the plant, second cut compared to the first cut. The marandu grass showed high tolerance to manganese toxicity, reaching a high leaf content in the shoot without affecting plant growth.

Country
Brazil
Keywords

580, Agricultural Sciences, S, QH301-705.5, Brachiaria brizantha, micronutriente, Agriculture, 630, Fertility, forrageira, Pasture, Micronutrient, forragicultura, Biology (General), Nutrition

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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