| dc.contributor | CPATU | |
| dc.creator | DIAS-FILHO, M.B. | |
| dc.date | 1999 | |
| dc.date | 1999-08-04 | |
| dc.date.accessioned | 2017-03-06T19:22:40Z | |
| dc.date.available | 2017-03-06T19:22:40Z | |
| dc.identifier | 11430 | |
| dc.identifier | http://www.alice.cnptia.embrapa.br/handle/doc/95512 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/263787 | |
| dc.description | Ipomoea asarifolia (Desr.) Roem. & Schultz (Convolvulaceae) and Stachytarpheta cayennensis (Rich) Vahl. (Verbenaceae), two weeds found in pastures and crop areas in Brazilian Amazonia, were grown in controlled environment cabinets under high (800-1000 umol m-2 s-1) and low (200-350 umol m-2 s-1) light regimes during a 40-day period. For both species leaf dry mass and leaf area per total plant dry mass, and leaf area per leaf dry mass were higher for low-light plants, whereas root mass per total plant dry mass was higher for high-light plants. High-light S. cayennensis allocated significantly more biomass to reproductive tissue than low-light plants, suggesting a probably lower ability of this species to maintain itself under shaded conditions. Relative growth rate (RGR) in I. asarifolia was initially higher for high-light grown plants and after 20 days started decreasing, becoming similar to low-light plants at the last two harvests (at 30 and 40 days). In S. cayennensis, RGR was also higher for high-light plants; however, this trends was not significant at the first and last harvest dates (10 and 40 days). These results are discussed in relation to their ecological and weed management implications. | |
| dc.description | 1999 | |
| dc.language | en | |
| dc.publisher | Pesquisa Agropecuaria Brasileira, Brasilia, v.34, n.6, p.945-52, jun. 1999. | |
| dc.relation | Área de Informação da Sede - Artigo em periódico indexado (ALICE) | |
| dc.subject | Allocation patterns | |
| dc.subject | Growth analysis | |
| dc.subject | Amazonia | |
| dc.subject | Ipomoea asarifolia | |
| dc.subject | Stachytarpheta cayennensis | |
| dc.subject | Alocacao de biomassa | |
| dc.subject | Analise de crescimento | |
| dc.title | Physiological responses of two tropical weeds to shade. I. Growth and biomass allocation. | |
| dc.type | Artículos de revistas | |
