Weed Suppression With Babassu Straw and Spatial Rice Arrangement

Denise Lima Cavalcante Marinho,Ivaneide De Oliveira Nascimento,Maria Rosângela Malheiros Da Silva,Raimundo Nonato Viana Santos,Maria José Pereira Corrêa

doi:10.5296/jas.v8i3.16974

Denise Lima Cavalcante Marinho, Ivaneide De Oliveira Nascimento + Show 3 more

Open Access

https://doi.org/10.5296/jas.v8i3.16974

Copy DOI

Abstract

Soil cover and spatial crop arrangement are practices that can suppress weeds. The study aimed to evaluate the babassu straw cover and the spatial arrangement of rice crops as weed control. The experiment was conducted in two rice arrangements spatial, the first, with a spacing of 35 cm and sowing density of 87 kg ha-1 (S35D87); and the second, with a spacing of 45 cm and sowing density of 68 kg ha-1(S45D68), and four amounts of babassu straw (0.0; 8.5; 12.5; and 16.5 t ha-1). Weed density, dry mass, phytosociology, and crop productivity were assessed. Babassu straw at 16.5 t ha-1 in the two crop arrangements reduced weed density from 66.8 to 76.2% and increased rice productivity. The most important weeds were Cyperus spp, Murdania nudiflora (L.) Brenan and Phyllanthus niruri L. Babassu straw cover and rice crop arrangement were efficient in the weeds suppression.

Highlights

Rice (Oryza sativa L.) is a crop that has socio-economic importance in Brazil due to its nutritional balance and growth potential in all regions in the country
Weeds, when not controlled in upland rice grown, could cause yield losses of up to 83.5% (Silva et al, 2015). These points to the negative impact of these species on the crop, and the importance of implementing management practices that keeps the populations at low levels of economic damages
Studies conducted by Silva et al (2015), Silva et al (2017) and Costa et al (2018) in rice crop showed the diversity of weed species is elevated in this crop, that the Poaceae and Cyperaceae families are the most relevant

Summary

Introduction

Rice (Oryza sativa L.) is a crop that has socio-economic importance in Brazil due to its nutritional balance and growth potential in all regions in the country. In Maranhão, rice is a cereal widely cultivated by family farmers in the upland system in which weeds are considered one of the major biological restrictions. Weeds, when not controlled in upland rice grown, could cause yield losses of up to 83.5% (Silva et al, 2015). These points to the negative impact of these species on the crop, and the importance of implementing management practices that keeps the populations at low levels of economic damages

Objectives

Methods

Results