Weed effect on the initial growth of Coffea arabica

Planta Daninha

Universidade Federal de Viçosa, Rio Paranaíba¹  Fialho, C.M.T.¹  UFV¹  Universidade Federal de Viçosa, Viçosa¹  Ronchi, C.P.¹  França, A.C.¹  Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina¹  Tironi, S.P.¹  Silva, A.A.¹ 

关键词: Arabica coffee;    competition;    integrated management;    coexistence period;    sustainability.;   

DOI  :  10.1590/S0100-83582011000100016

学科分类：农业科学（综合）

来源: Sociedade Brasileira da Ciencia das Plantas Daninhas (S B C P D) / Brazilian Society of Herb Science

【 摘 要 】

The goal of this work was to evaluate the effects of weeds on the growth of young Arabica coffee plants, at different densities of infestation. Seedlings of Mundo Novo coffee cultivar were transplanted at the stage of four to five pairs of completely expanded leaves, to pots with capacity of 25 dm3. The experiment was arranged in a randomized block in factorial design (4 x 4), with four weed species (Digitaria horizontalis, Brachiaria decumbens, Brachiaria plantaginea and Mucuna aterrima) at four planting densities coexisting with coffee (zero, two, four, and six plants per pot), with four replications. The weed species were planted 60 days after the coffee plant transplanting (0 DAT). On this date, and on the day the experiment was concluded, at 90 DAT, height, leaf area and stem diameter of the coffee plants were determined. At 90 DAT, measurements were also performed to determine the increase in height, leaf area and stem diameter of the coffee plants, as well as shoot and root dry matter of the coffee plants and weeds and coffee plant root density. Based onthese data, estimations were made for leaf mass ratio, stem mass ratio, root mass ratio, leaf area ratio and root system/shoot ratio of the coffee plants. The species M. aterrima presented the highest reduction rate for plant height, leaf area, dry matter of stem and leaves and girth diameter of the coffee plants. Among the grasses, B. plantaginea presented the highest reduction rate for plant height, leaf area, girth diameter and root density. A negative relation was observed between weed increase and growth variables, and between root mass ratio and root system/shoot ratio.

【 授权许可】

Unknown