SciELO - Scientific Electronic Library Online

 
vol.30 issue3Morphophysiology of corn plants in competition with picão-preto and trapoeraba submitted to clearingsSoil fertility and maize yields in green manure systems in northern Minas Gerais author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Planta Daninha

Print version ISSN 0100-8358

Abstract

CAMPOS, L.H.F. et al. Initial growth of Merremia cissoides, Mucuna aterrima and Neonotonia wightii . Planta daninha [online]. 2012, vol.30, n.3, pp.497-504. ISSN 0100-8358.  http://dx.doi.org/10.1590/S0100-83582012000300005.

This work aimed to evaluate the initial growth of three species of weed considered as emerging problems for sugarcane crop: Neonotonia wightii, Stizolobium aterrimum, and Merremia cissoides. The experiment was arranged in a completely randomized design, with seven treatments and four repetitions for each species studied. Seven growth evaluations (treatments) were carried out every 15 days, totaling a 105 day-cycle, followed by the analysis of the variables, such as leaf area (Af) given in (cm2 per plant). The sampled material was dried in an oven, with the dry mass (g per plant) of the roots (Mr), the shoot (Ma) and total (Mt) being measured. The biomass accumulation observed shows the high ability of S. aterrimum to produce biomass. At the end of the experiment, stabilization of the dry mass of the shoot (Ma) was observed for the three species, followed by the variable total dry mass (Mt) also showing stabilization at the end of the experiment. S. aterrimum presented the highest initial growth rate and total dry mass accumulation, besides the highest leaf area (Af). N. wightii presented slow initial growth, while M. cissoides showed a significant accumulation of total dry mass (Mt), compared with the other species.

Keywords : growth analysis; biology; dry mass; leaf area.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License