relações entre a produção de laranjeira 'westin' e as precipitações em botucatu, sp relationships between production of 'westin' sweet orange trees and rainfall at botucatu, são paulo state, brazil
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1999
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Abstract
O trabalho estuda a correlação entre a produção de um pomar de laranja, plantado no altiplano de Botucatu, SP, com as precipitações que ocorrem dezesseis meses antes da colheita e a idade do pomar. As plantas eram de laranjeira doce (Citrus sinensis (L.) Osbeck), variedade Westin, de clone nucelar, enxertadas em porta-enxerto de limoeiro 'Cravo' (Citrus limonia Osbeck), plantadas em solo Terra Roxa Estruturada, a 810 m de altitude e em região de clima do tipo Cwb. A cultura foi conduzida de modo convencional e sem irrigação. Coletaram-se dados de produção, nos períodos entre o 3º e o 17º e entre o 21º e o 27º ano de idade do pomar, para análise do comportamento da produção e o efeito da idade e das precipitações na produção. Calcularam-se equações lineares múltiplas de regressão, entre a produção, idade do pomar e as precipitações mensais, nos períodos de pomar juvenil, adulto, senescente e adulto-senescente. A produção correlacionou-se com a idade e com valores mensais de precipitação. Os pequenos desvios observados entre os valores medidos e estimados de produção revelaram que as equações de regressão poderiam ser usadas na previsão de safra ou no controle de irrigação suplementar do pomar.
This paper deals with the existence of correlation between the production of a sweet orange orchard, planted at the plateau of Botucatu, São Paulo State, Brazil, with the orchard age and the rainfall that occurred in the sixteen months before the picking season. The plants were of sweet orange trees (Citrus sinensis (L.) Osbeck), variety Westin, budded on 'Rangpur' lime (Citrus limonia Osbeck) rootstock, grown on "Terra Roxa Estruturada" soil, at an altitude of 810 m above sea level and in a region with Cwb climatic type. The orchard was conducted by conventional ways and no irrigation was applied. The production of the orchard was recorded, during the period from the 3rd until the 17th and from the 21st until the 27th year old, to analyse the behaviour of the production and the effect of the orchard age and of the rainfalls on the production of the plants. Multi linear regression equations among the production, age of the orchard and monthly rainfalls were calculated for the juvenile, adult, senescent and adult-senescent phases of the period of orchard production. The production was found to be correlated with the orchard age and with the monthly rainfalls. The small deviations between the measured and calculated values of production showed that the regression equations could be used to crop forecast or to suplemental irrigation control of the orchard.
This paper deals with the existence of correlation between the production of a sweet orange orchard, planted at the plateau of Botucatu, São Paulo State, Brazil, with the orchard age and the rainfall that occurred in the sixteen months before the picking season. The plants were of sweet orange trees (Citrus sinensis (L.) Osbeck), variety Westin, budded on 'Rangpur' lime (Citrus limonia Osbeck) rootstock, grown on "Terra Roxa Estruturada" soil, at an altitude of 810 m above sea level and in a region with Cwb climatic type. The orchard was conducted by conventional ways and no irrigation was applied. The production of the orchard was recorded, during the period from the 3rd until the 17th and from the 21st until the 27th year old, to analyse the behaviour of the production and the effect of the orchard age and of the rainfalls on the production of the plants. Multi linear regression equations among the production, age of the orchard and monthly rainfalls were calculated for the juvenile, adult, senescent and adult-senescent phases of the period of orchard production. The production was found to be correlated with the orchard age and with the monthly rainfalls. The small deviations between the measured and calculated values of production showed that the regression equations could be used to crop forecast or to suplemental irrigation control of the orchard.
| Reference Key |
tubelis1999pesquisarelaes
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|---|---|
| Authors | ;Antonio Tubelis;Ary Aparecido Salibe;Gislene Pessim |
| Journal | proc - the fourth ieee workshop on software technol for future embedded and ubiquitous syst, seus 2006 andthe second int workshop on collaborative comput, integr, and assur, wccia 2006 |
| Year | 1999 |
| DOI |
10.1590/S0100-204X1999000500007
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| URL | |
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