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Previous issue date: 2016-08-31 / The aim of this research was study the use of simplified irrigation controller (SIC) in 4 tensions values to determine the best tension for the development of seedlings of Schinus terebinthifolius in protected environment. The treatments were: T 1 = 4 kPa of tension, T 2 = 6 kPa of tension, T 3 = 8 kPa of tension and T 4 = 10 kPa of tension. The seedlings were grown in plastic bags with 3534 cm3 of a volume. The parameters evaluated were diameter at breast height (D), height (H), relation H / D, dried mass weight of roots (DMWR), dried mass of aerial part (DMAP), Dickson quality index (DQI), water use efficiency (WUE) and chlorophyll content (IFC). The evaluations were performed every two weeks, from 30 days after transplanting up to 105 days. The results indicated that the 6 kPa of tension consists in optimum operating value for the system proposed in terms of experimental conditions studied because it represents the best growth ratio by volume of water used for irrigation. In this treatment the average results per plant were: D= 5.61 mm; H= 33.20 cm; H / D= 5.97; DMAP= 4.78 g; DMWR= 2.44 g; DQI= 0.91; WUE= 1.53 and IFC= 56.55. It's not recommended the production of seedlings of Schinus terebinthifolius using 10 kPa of tension because there was a high mortality. / O objetivo deste trabalho foi avaliar a utiliza??o do acionador simplificado de irriga??o (ASI) em 4 (quatro) diferentes tens?es de ?gua no substrato para determinar a melhor tens?o para o desenvolvimento das mudas de Aroeira-Pimenteira (Schinus terebinthifolius) em ambiente protegido. Os tratamentos utilizados foram: T 1 = Tens?o de 4 kPa, T 2 = Tens?o de 6 kPa, T 3 = Tens?o de 8 kPa e T 4= Tens?o de 10 kPa. As mudas foram produzidas em sacos pl?sticos com volume de 3.534 cm3. Os par?metros avaliados foram di?metro de colo (D), altura (H), rela??o altura por di?metro de colo (H/D), fitomassa seca das ra?zes (MSR), fitomassa seca parte a?rea (MSPA), ?ndice de qualidade de Dickson (IQD), efici?ncia de uso de ?gua (EUA) e clorofila total (IFC). As avalia??es foram realizadas quinzenalmente, a partir dos 30 dias ap?s o transplante at? os 105 dias. Os resultados obtidos indicaram que a tens?o de 6 kPa compreende a tens?o ?tima de opera??o para o sistema proposto diante das condi??es experimentais estudadas e isso deve-se a melhor rela??o crescimento por volume de ?gua utilizado na irriga??o. Neste tratamento os resultados m?dios por planta foram: D= 5,61 mm; H= 33,20 cm; H/D= 5,97; MSPA= 4,78 g, MSR= 2,44 g; IQD= 0,91; EUA= 1,53 g L-1 e IFC= 56,55. N?o se recomenda a produ??o de mudas de aroeira utilizando uma tens?o de 10 kPa pois houve uma alta taxa de mortalidade das mudas.
| Identifer | oai:union.ndltd.org:IBICT/oai:localhost:jspui/1874 |
| Date | 31 August 2016 |
| Creators | OLIVEIRA JUNIOR, Angelo Gomes de |
| Contributors | Medici, Leonardo Oliveira, Medici, Leonardo Oliveira, Silva, Leonardo Duarte Batista da, Grasiela, Dinara |
| Publisher | Universidade Federal Rural do Rio de Janeiro, Programa de P?s-Gradua??o em Agricultura Org?nica, UFRRJ, Brasil, Instituto de Agronomia |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da UFRRJ, instname:Universidade Federal Rural do Rio de Janeiro, instacron:UFRRJ |
| Rights | info:eu-repo/semantics/openAccess |
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