Abstract
This study aimed to evaluate the use of hydro polymer retainer in the quantitative growth of coffee plants at different levels of irrigation and soil types. The experiment was conducted in pots with seedlings bag in the greenhouse of the Setor de Cafeicultura, Universidade Federal de Lavras. The experimental design was in randomized blocks in factorial (2x4x2): absence or presence of hydro polymer retainer, four levels of irrigation (25%, 50%, 75% and 100%), two soil types (sandy soil and medium texture). At 150 days evaluated the stem diameter, plant height, leaf area, number of leaves, dry weight of shoots, plant dry mass, root dry weight, root dry weight ratio of shoot, leaf area ratio, absolute growth rate, relative growth rate, net assimilation rate and leaf area index. It was concluded that the polymer hydro retainer hydrated favored the growth of coffee plants and irrigation promoted greater growth of coffee in medium textured soil compared to soils with sandy texture.
Highlights
Phytomass production in a coffee plant is the result of the plant interacting with the environment
Among the estimates in a quantitative analysis of plant growth, it is possible to determine: the “absolute growth rate” as being the increase in plant phytomass in any one period; the “relative growth rate” as representing the amount of plant material produced by a given amount of existing material (g) over a time interval; and the “net assimilation rate” as an assessment of the size of the assimilating system, which is involved in the production of dry matter
Interpretation of the results of quantitative growth analysis should take into account many other variables such as soil and air moisture and the plant water balance, since growth in coffee plants varies with the availability of water
Summary
Phytomass production in a coffee plant is the result of the plant interacting with the environment. The aim of this work was to analyse the quantitative growth of coffee plants cultivated with the use of a waterretaining polymer in an irrigated system, and on soils of a medium and sandy texture, under greenhouse conditions.
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