Interference of Broadleaf Buttonweed and White-Eye in Soybean
| Autor: | Michelangelo Muzell Trezzi, S.C. Batistel, F.B. Pagnoncelli, M. Gallon, P.H.F. Mizerski, F. Diesel |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Glycine max Physiology QH301-705.5 media_common.quotation_subject Randomized block design Richardia brasiliensis Plant Science 01 natural sciences Biochemistry Competition (biology) Cultivar Biology (General) media_common density Rubiaceae biology interspecific competition Botany 04 agricultural and veterinary sciences Interspecific competition biology.organism_classification Horticulture Point of delivery QK1-989 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Borreria latifolia Weed Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Planta Daninha, Vol 38 (2020) Planta Daninha v.38 2020 Planta daninha Sociedade Brasileira da Ciência das Plantas Daninhas (SBCPD) instacron:SBCPD |
| ISSN: | 0100-8358 |
| Popis: | Weed species is one of the factors contributing to grain yield losses due to crop-weed competition. Two of the most common weeds of soybean fields in Brazil are from the Rubiaceae family: Borreria latifolia and Richardia brasiliensis. This study aimed to evaluate the effects of B. latifolia and R. brasiliensis on plant development, yield components, and soybean productivity. Two assays were conducted in a randomized block design with four replications, using a two-level factorial design, in which the first factor consisted of the species B. latifolia and R. brasiliensis and the second factor consisted of the densities 0, 2, 4, 6, 8, 10, and 12 plants m-2. Plant height, leaf area and total chlorophyll in the V6 and R5 stages, number of pods per plant, number of grains per pod, 1000-grain weight, and grain yield loss were evaluated in both cultivars. Grain yield of both soybean cultivars was negatively affected by the interference with B. latifolia and R. brasiliensis. The species B. latifolia was more competitive with soybean when compared to R. brasiliensis, causing higher reductions for all variables. Each B. latifolia plant per square meter is able to reduce the yield of soybean by 3 a 4.4%, while each R.brasiliensis plant reduces yield by 2 a 2.6%. For both species, the reduction in soybean yield due to competition was caused by a decrease in the number of pods per plant, number of grains per pod, and 1000-grain weight. |
| Databáze: | OpenAIRE |
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