Manejo da irrigação em diferentes substratos na produção de mudas de laranja
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Data
2006-02-01
Autores
Fachini, Emerson [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
O trabalho teve por objetivo avaliar o desenvolvimento de mudas de laranja em 4 níveis de irrigação e 5 tipos de substratos. O experimento foi conduzido na Fazenda Santa Cruz, no Município de Monte Azul Paulista no período de novembro de 2003 a outubro de 2004. Foi utilizada uma casa de vegetação comercial, coberta com filme de plástico transparente de 200 æm, cercada lateralmente com a tela de malha de 2mm2, de cor branca e com um pé direito de 3,5 m de altura. As bancadas eram de ferro, ficando a 60 cm de altura do solo. O delineamento experimental adotado foi o de blocos casualizados, com parcelas ubdivididas, tendo 4 repetições, sendo que as parcelas correspondem aos 4 níveis de irrigação e as sub-parcelas aos 5 tipos de substratos, com 4 mudas de laranja cada. Os substratos utilizados foram os seguintes: S1 - Golden Mix mistofibra (Amafibra); S2 - Golden Mix (Amafibra); S3 - Rendmax (Eucatex); S4 - Tropstrato (Vida verde); S5 - Plantmax (Terra do paraíso). As lâminas de irrigação foram calculadas com base na tensão de água no substrato: I1 - 10 kPa de tensão de água no substrato; I2 - 20 kPa de tensão de água no substrato; I3 - 40 kpa de tensão de água no substrato; I4 - 80 kPa de tensão de água no substrato. As variáveis avaliadas foram: altura de plantas e diâmetro do caule, tempo gasto para a enxertia, matéria seca da parte aérea e do sistema radicular, consumo de água pelas plantas. Os resultados obtidos mostraram que o substrato S2, desde o início do experimento, proporcionou o melhor desenvolvimento das plantas, enquanto as médias dos níveis de irrigação não apresentaram diferenças significativas. O substrato S2 foi o substrato em que as plantas atingiram primeiro o ponto de enxertia, seguido do substrato S1 e depois o substrato S5. Os substratos S3 e S4 não proporcionaram desenvolvimento adequado às plantas para que estas pudessem ser... .
The object of the research was evaluating the development of the orange tree in four irrigation levels and five substrate types. The research was conduced in Santa Cruz Farm, in the Monte Azul Paulista city, during November 2003 to October 2004. It was utilized commercial greenhouse, covered on the top with plastic film of 200um and the lateral with the tela of 2 mm2. A randomized block experiment design split plots, with 4 repetitions, 4 levels of irrigation and 5 types of substrate. The substrate were: S1 - Golden Mix mistofibra; S2 - Golden Mix granulate; S3 - Rendmax; S4 - Tropstrato and S5 - Plantmax. The irrigation levels were based on the time of the irrigation: I1 - 10 kPa of water tension in the substrate; I2 - 20 kPa of water tension in the substrate; I3 - 40 kPa of water tension in the substrate; I4 - 80 kPa of water tension in the substrate. The parameters evaluated were plant height, diameter of plant street, time spended for get graft, dry matter area part and roots part and plant's water requirement. The results shows that since begin of the research, the substrate S2 was better, because the plants in that substrate have a better development. Didn't have difference in irrigation level. The substrate S2 get first the time to graft after was Substrate S1 and the last one was Substrate S5. The substrates S3 and S4 didn't get adequate development to get a graft. The treatment that spent more water was the I2S2. Types of substrate influenced more in the development of the orange tree than the irrigation levels.
The object of the research was evaluating the development of the orange tree in four irrigation levels and five substrate types. The research was conduced in Santa Cruz Farm, in the Monte Azul Paulista city, during November 2003 to October 2004. It was utilized commercial greenhouse, covered on the top with plastic film of 200um and the lateral with the tela of 2 mm2. A randomized block experiment design split plots, with 4 repetitions, 4 levels of irrigation and 5 types of substrate. The substrate were: S1 - Golden Mix mistofibra; S2 - Golden Mix granulate; S3 - Rendmax; S4 - Tropstrato and S5 - Plantmax. The irrigation levels were based on the time of the irrigation: I1 - 10 kPa of water tension in the substrate; I2 - 20 kPa of water tension in the substrate; I3 - 40 kPa of water tension in the substrate; I4 - 80 kPa of water tension in the substrate. The parameters evaluated were plant height, diameter of plant street, time spended for get graft, dry matter area part and roots part and plant's water requirement. The results shows that since begin of the research, the substrate S2 was better, because the plants in that substrate have a better development. Didn't have difference in irrigation level. The substrate S2 get first the time to graft after was Substrate S1 and the last one was Substrate S5. The substrates S3 and S4 didn't get adequate development to get a graft. The treatment that spent more water was the I2S2. Types of substrate influenced more in the development of the orange tree than the irrigation levels.
Descrição
Palavras-chave
Laranja - Mudas, Laranja - Irrigação, Estufas, Irrigação por gotejamento, Orange tree, Irrigation, Substrate
Como citar
FACHINI, Emerson. Manejo da irrigação em diferentes substratos na produção de mudas de laranja. 2006. xiii, 123 f. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Ciências Agronômicas, 2006.