期刊论文详细信息
CERNE | |
Biomass production, B accumulation and Ca/B ratio in Eucalyptus under various conditions of water availability and B doses | |
Sílvio Júnio Ramos2  Valdemar Faquin1  Fabrício William Ávila1  Rose Myrian Alves Ferreira1  Josinaldo Lopes Araújo1  | |
[1],Instituto Tecnológico Vale/ITV-MiBelo Horizonte MG ,Brasil | |
关键词: Micronutrient; synergism; water tension; Micronutriente; sinergismo; tensão hídrica; | |
DOI : 10.1590/S0104-77602013000200013 | |
来源: SciELO | |
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【 摘 要 】
Soils destined for forest crops are often limiting with respect to boron (B) and in several eucalyptus crops boron deficiency has been found to be a common occurrence. The objective of this study is to evaluate biomass production, B accumulation and Ca/B ratio in eucalyptus cultivated under different conditions of soil, water availability and doses of B. To that end, an experiment was conducted using a completely randomized design with a 5 x 2 x 2 factorial arrangement consisting of five doses of B (0.00, 0.25, 0.75, 2.25 and 6.25 mg kg-1), two types of soil, namely a Dark Red Latosol (LE) and a Red-Yellow Latosol (LV), and two water tension levels (-0.033 and -0.010 MPa), with four replicates. After plants were grown, determinations were made of Ca and B contents as well as Ca/B ratios in different portions of the plants. Accumulation of B was obtained from the ratio of its contents to dry biomass in each plant portion. It was found that, under natural conditions, both Dark Red Latosol and Red-Yellow Latosol fail to meet the nutritional requirements for B in eucalyptus, potentially being limiting to that species. Overall, soil moisture influenced dry biomass production and accumulation of B only in the case of the more sandy texture soil (Red-Yellow Latosol), denoting that this factor is conditional on soil texture. Ca/B ratio results showed that application of B to the soil without a suitable supply of Ca can lead to an imbalance between these nutrients, with possible implications for plant growth and nutrition.【 授权许可】
CC BY
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
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