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| GIANCOTTI,P.R.F.; MORO,M.S.; NEPOMUCENO,M.P.; MARTINS,P.F.R.B.; BARROSO,A.A.M.; ALVES,P.L.C.A.. |
| ABSTRACT This research was carried out to evaluate the interference periods and phytosociological indexes of the weed community on sweet sorghum, hybrid CVSW 80007, cultivated for two seasons in a year. The treatments were based on an increased duration of weed presence and weed absence after sowing (0, 4, 7, 14, 21, 28, 35, 42, 56 and 68 days after crop emergence for the summer season and 0, 4, 7, 14, 21, 28, 35, 42, 49, 56, 63 and 100 days for the fall season). The weed community was evaluated based on the number of weeds and the dry mass of each weed population in each period of weed control in the summer season and each period of no weed control and weed control in the autumn season. These data were used to determine the relative indexes of density,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sorghum bicolor; Weeds; Weed competition. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100249 |
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| BACHA,A.L.; MARTINS,P.F.R.B.; ALVES,P.L.C.A.; PAULA,R.C.. |
| ABSTRACT: Eucalyptus plants are sensitive to stress during their initial development, and water deficit is the most important one. Thus, the hormetic effect caused by the application of chemical products may be a factor that allows plants to tolerate such stresses. The objective of this study was to evaluate the effects of trinexapac-ethyl on the initial growth of Eucalyptus urophylla (Clone I-144), under water deficiency, at two application timings (before planting - BP; and after planting - AP). Two experiments were conducted simultaneously in a greenhouse for 74 days after planting (DAP) eucalyptus in 15 L pots. Treatments consisted of three trinexapac-ethyl doses (0.0, 30, and 60 g a.i. ha-1) and two water conditions (with and without water deficit). A... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus urophylla; Hormesis; Subdose; Abiotic stress. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100203 |
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| MARTINS,P.F.R.B.; YAMAUTI,M.S.; ALVES,P.L.C.A.. |
| ABSTRACT: The aim in this work was to evaluate the coexistence of Urochloa decumbens (signal grass) and Synedrellopsis grisebachii (Cinderella weed) in a replacement series experiment. To find the critical population density, 1, 2, 4, 8, 16, 24 and 32 plants were planted in the same box, harvested after 40 days, dried and weighted, and analyzed through regression analysis. The replacement series experiment used density percentages for signal grass and Cinderella weed of 100:0, 75:25, 50:50, 25:75 and 0:100. The aboveground parts were harvested, dried and analyzed through qualitative and quantitative measures. Sixteen plants per box were needed for the signal grass to achieve the critical population. Qualitative analysis showed mutual harm to the dry matter... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Replacement series experiment; Interspecific competition; Intraspecific competition ecological indexes; Urochloa decumbens; Synedrellopsis grisebachii. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100281 |
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