Camila Coelho Becker

Contribuição das ramificações e a evolução do índice de área foliar em cultivares modernas de soja

The purposes of this study were to quantify the branches contribution and the leaf area index evolution in modern cultivars of soybean with different maturity groups, stem termination, sowing in different dates and producing regions of soybean in Rio Grande do Sul. Field experiments were conducted during the growing season 2013/2014 in Santa Maria, Julio de Castilhos and in three soybean crops on the municipalities of Restinga Seca, Tupancireta and Agua Santa. It were carried out analysis (occurrence date) of reproductive stages and determination total, maximum, of main stem and of branches of leaf area index in thirteen cultivars of soybean. The leaf area index on the branches contributes with about 31%, 12.3% and 11% of the total leaf area index on the determinate cultivars and with 20.2%, 11.8% and 9% of the total leaf area index on the indeterminate cultivars sowing in September, November and February, respectively, in Santa Maria. Most cultivars showed a reduction on total leaf area index, maximum, of main stem and of branches with the delay on planting date, independently of the maturity group and stem termination.

Parâmetros quantitativos de hastes florais de gladíolo conforme a data de plantio em ambiente subtropical

The objective of this work was to determine the growing seasons, in a subtropical environment, when it is possible to produce gladiolus ( Gladiolus x grandiflorus ) stems that meet commercial, quantitative standards for cut flowers of the national market. Two field experiments were carried out – one from August 2011 to July 2012, and the other from August 2012 to July 2013 – with three gladiolus cultivars and 12 planting dates for each experiment. Stem total length, rachis length, and stem diameter were evaluated at the harvesting point, when the petal color appears in the first three florets at the stem base. The best months for production of gladiolus stems are July, August, September, February, March, and April, although in the other planting dates the stem quality was never below the minimum standard (except for the periods of frost during heading).

Dano por Granizo na Cultura da Soja em Condições de Lavoura: Um Estudo de Caso

The objective of this study was to quantify the damages caused by a hail event on a soybean farm. The hail event happened at Agua Santa County, Rio Grande do Sul State, Brazil, during the 2013/2014 growing season. Were conducted dry matter evaluations of leaf, petiolate, pod and leaf area index. Such measurements were obtained before and also after of the hail event occurred on 08/02/2014. By using satellite and radar images it was possible to identify the hail event intensity. The hail event damage on the soybean crop were reduction dry matter on leaf blade (0.13 Mg ha−1), on petiolate (0.01 Mg ha−1) and on pods (0.002 Mg ha−1), also were observed a decrease in leaf area index that varying from 7 to 34% and breaking off the growth apex in 32% of plants on the experiment. Therewith, the satellite and radar images can be a tool to help the extension on determination of hail damage on soybean farms.