Production and nutritional quality of black oat forage grown in different population stands under a successive cutting regime

A Dochwat,V.H Bumbieris Junior,F.B Cristo,B.F Zdepski,M Neumann,J.C Heker Junior,A.M Souza,A.F Matchula

doi:10.1590/1678-4162-11313

Abstract

ABSTRACT The present study aimed to evaluate the agronomic productive and qualitative traits of forage of black oats grown in different stands of plants. The experimental design was a 2 x 2 factorial randomized complete block design consisting of four treatments, two plant stands (175 and 350 plants m2) associated with two successive cutting periods (vegetative and full vegetative) and four replications. The stand of plants did not influence the production of dry biomass; with 175 plants m2, we obtained a compensatory effect by the greater number of tillers m2-1 and/or tiller plant-1. The population stand influenced the chemical parameters, where 175 plants m2 resulted in forage with higher contents of hemicellulose and total digestible nutrients and a lower content of neutral detergent fiber. In the comparison between cuts, the first cut compared to the second presented higher values of crude protein (26.53%). It is recommended that the black oat be cultivated with a population stand of 175 plants m2 for generating an increase in the number of tillers m2-1 and tillers plant-1, in addition to improving the in situ dry matter digestibility of the whole plant, without causing reduction of production of dry biomass per unit area.

Highlights

Among the factors that may influence the growth of black oats, population stand or sowing density in the establishment of the crop stand out
Research has shown that the production of dry biomass of black oats is higher in higher plant populations at the beginning of development, tending to disappear during the crop cycle, especially after a first cut (Flaresso et al, 2001)
In the overall mean, when black oats were cultivated with 175 plants m2, there was a pasture structure with a lower (P

Summary

Introduction

Among the factors that may influence the growth of black oats, population stand or sowing density in the establishment of the crop stand out. The selection of the appropriate plant population for a given species influences the tillering capacity (Argenta et al, 2001), which may result in the compensation of existing voids in the crop. For Rosseto and Nakagawa (2001), black oats are characterized as a species with high tillering ability, and can grow up to 17 tillers per plant. Another alternative for the plant to compensate for smaller populations encompasses the increase in the dry biomass of tillers and the main stem. Research has shown that the production of dry biomass of black oats is higher in higher plant populations at the beginning of development, tending to disappear during the crop cycle, especially after a first cut (Flaresso et al, 2001)

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Conclusion