Potencial de utilização de cobertura vegetal de sorgo e milheto na supressão de plantas daninhas em condição de campo: II - Efeitos da cobertura morta
By M. M. Trezzi, R. A. Vidal. 2004
107 citations recorded by the source corpus.
The weed supression capacity of cover crops is well known and explored, although only a few works have been conducted on the relative importance of the physical and allelopathic effects on this phenomenon. Two trials were carried out in the field, in 1999/2000 and 2000/2001, at the experimental area of the University of Rio Grande do Sul, Brazil, arranged in a randomized experimental block design with four replications to evaluate the effects of sorghum and pearl millet mulch on weedsupression. In both experimental years, the treatments resulted in a factorial, where factor A was composed by sorghum genotypes RS 11, BR 601, and BR 304, representatives of three classes of hydrophobic root extract production in the laboratory; the pearl millet genotype Comum RS; and by a check without cultures. Factor B was formed by different levels of straw of each genotype over the soil. In 1999/2000, sorghum straw levels of 1.3 t ha-1 were sufficient to decrease Brachiaria plantaginea (BRAPL) and Sida rhombifolia (SIDRH) infestations by 50%. In 2000/2001, 4 t ha-1 of sorghum or pearl millet straw were sufficient to decrease 91, 96, and 59% of the total SIDRH, BRAPL, and Bidens pilosa population, respectively. The presence of sorghum shoot residues is more important in weed supression than the presence of root residues of this crop.
Subfields: Agronomy and Crop Science, Plant Science
View Paper: https://www.semanticscholar.org/paper/6a6c15f3443b5c964f3b9afa544150135f89fd4e
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- Henrique von Hertwig Bittencourt
- R. A. Vidal
- Antônio Pedro da Silva Souza Filho
- Michelangelo Muzell Trezzi
- A. A. Balbinot Junior
Citations in the corpus
- Allelopathy: driving mechanisms governing its activity in agriculture (2016, background): “), which exudes sorgoleone from its roots and inhibits the emergence and growth of various weed species (Trezzi and Vidal 2004).”