Abstract
The objective of the present study was to evaluate the interference of water excess in soil on the growth of young coffee plants of the Mundo Novo and Catuaí cultivars.Plants were subjected to the following three different substrate water availability conditions: control (well-watered), continuous substrate waterlogged, and intermittent substrate waterlogged. Several growth-related traits were evaluated over the course of 19 weeks. Based on the number and quality of the affected variables from all forms of analyses, the Catuaí cultivar showed greater sensitivity to waterlogging. Both cultivars exhibited growth inhibition in response to substrate waterlogging stress, which was exacerbated by premature leaf dropping.
Highlights
Brazil currently produces large amounts of high quality coffee as a consequence of recent expansions in production
This study aims to evaluate the effects of excessive soil water on the growth of coffee seedlings from Mundo Novo IAC 379-19 and Red Catuaí IAC 44 cultivars
After the development of eight pairs of fully expanded leaves, the seedlings were subjected to the following three different conditions of water availability in the substrate: (a) seedlings maintained with substrate moisture close to field capacity (FC), which were monitored by the direct method proposed by Souza et al (2002); (b) continuous waterlogging of the substrate (CW), where the seedlings were placed in buckets with a permanent layer of water covering two-thirds of the height of the polyethylene bag; and (c) intermittent waterlogging of the substrate (IW), where the plants alternately remained for three days under continuous waterlogging and for four days under field capacity throughout the experimental period
Summary
Brazil currently produces large amounts of high quality coffee as a consequence of recent expansions in production This expansion has been accomplished by using irrigation in regions that were previously considered to be marginal because of their extended periods of water deficiency (LEMOS FILHO et al, 2010). The global temperature is expected to increase by 2°C to 4.5°C with an increase of tropical rainfall, according to the latest report from the Intergovernmental Panel on Climate Change (IPCC, 2007). Based on these predictions, the areas that border climatically ideal coffee cultivation regions such as Brazil will become unfavorable for growing coffee (ASSAD et al, 2004). As a result of the increased rainfall that was predicted by these authors, even the cultivars that
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