Share This Article:

Rice and Barnyardgrass: Water Stress and Initial Establishment

Full-Text HTML XML Download Download as PDF (Size:1363KB) PP. 3110-3119
DOI: 10.4236/ajps.2017.812210    580 Downloads   1,050 Views

ABSTRACT

The present work aimed to evaluate the effect of different water stress levels on the development of both rice and barnyardgrass. The study was established into greenhouse, in completely randomized design, in factorial scheme 2 × 5, with four replications. Factor “A” comprised the plant species (rice cv. BRS Querência, or the weed Echinochloa crusgalli), and factor “B” comprised the water stress levels: (T1) continuous flood (CF); (T2) 0 kPa (saturated soil); (T3) 10 kPa; (T4) 40 kPa; and (T5) 100 kPa. Plant emergence was assessed every day; plant length was measured 30 days after planting. At the end of the experiment, the number of leaves per plant, root length and shoot and root dry mass were determined. Our data supply evidence that under moderate water stress, up to approximately 40 kPa, rice tends to perform better than barnyardgrass in the initial stage of crop growth, when under equivalent plant density. However, barnyardgrass is usually present in much higher plant density than crop plants in fields traditionally cropped with rice. Thus, efficient control of barnyardgrass should be accomplished to avoid damage to rice crop by competition for environmental resources.

Cite this paper

Barbat Parfitt, J. , Andres, A. , Concenço, G. , Teló, G. , Schreiber, F. , da Silva, J. , Moisinho, I. and Timm, P. (2017) Rice and Barnyardgrass: Water Stress and Initial Establishment. American Journal of Plant Sciences, 8, 3110-3119. doi: 10.4236/ajps.2017.812210.

Copyright © 2020 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.