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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Estudo comparativo entre os sistemas de produÃÃo integrada e convencional para cajueiro-anÃo precoce. / Comparative study between systems of production integrated and conventional for precocious cashew ( Anacardium occidentale L )

Ana Paula Silva de Andrade 31 January 2007 (has links)
O cajueiro (Anacardium occidentale L.) à uma planta de grande importÃncia econÃmica para o Nordeste brasileiro, pela diversidade de produtos proporcionados pelo fruto e pedÃnculo e pela quantidade de empregos gerados. Apesar disso, inexiste uma padronizaÃÃo nos sistemas de produÃÃo empregados, com reflexos negativos na produÃÃo e qualidade da matÃria-prima destinada ao consumo e à indÃstria. A conversÃo dos sistemas de produÃÃo vigentes para o sistema de produÃÃo integrada poderà contribuir para atenuar este quadro. O objetivo deste trabalho foi comparar os sistemas de produÃÃo integrada e convencional para cajueiro-anÃo precoce, quanto à produÃÃo de castanha e à produÃÃo e qualidade do caju-de-mesa (caju para consumo in natura). O experimento foi instalado em um pomar comercial, localizado no municÃpio de Beberibe (CE), em duas Ãreas contÃguas, de aproximadamente 0,5 ha cada, distanciadas entre si de 35 m, onde foram desenvolvidos os sistemas de ProduÃÃo Integrada (PI) e Convencional (PC), respectivamente. No sistema PI foram aplicadas as prÃticas recomendadas nas Normas TÃcnicas de ProduÃÃo Integrada de Caju. No PC foram aplicadas as prÃticas comumente utilizadas pelo produtor. Para as caracterÃsticas produtivas foram analisadas as seguintes variÃveis para castanha: produÃÃo (kg/planta), nÃmero/planta e peso mÃdio (g). Para caju-de-mesa foram avaliados: produÃÃo (kg/planta), nÃmero/planta e o peso mÃdio (g). Para as caracterÃsticas qualitativas foram analisadas: cor da pelÃcula, firmeza de polpa, sÃlidos solÃveis totais (SST), acidez total titulÃvel (ATT), teor de vitamina C e pH. Nas avaliaÃÃes das caracterÃsticas produtivas foi utilizado o delineamento experimental inteiramente casualizado, com dois tratamentos e 12 repetiÃÃes, onde cada planta constituiu-se numa unidade experimental. Para as anÃlises das caracterÃsticas de qualidade foi empregado o delineamento experimental inteiramente casualizado, com dois tratamentos e cinco repetiÃÃes, constituÃdas de seis cajus cada. As mÃdias obtidas foram comparadas pelo teste t (P≤0,050). Observou-se diferenÃa significativa nas variÃveis produÃÃo e nÃmero de castanhas comerciais e nÃmero total de castanhas, com a mÃdia do primeiro sistema superior a do segundo. Para as variÃveis ATT e teor de vitamina C verificou-se que as mÃdias obtidas no sistema PI foram significativamente superiores Ãs do PC. Para a variÃvel pH, observou-se diferenÃa significativa entre as mÃdias obtidas nos sistemas, sendo o valor obtido no PC superior ao do PI. A qualidade pÃs-colheita de pedÃnculos, a produÃÃo e o nÃmero de castanhas foram influenciados pelos sistemas de produÃÃo. / The cashew tree (Anacardium occidentale L.) is a plant of great economic importance for the Brazilian Northeast Region due to the diversity of products generated for the fruit and peduncle and the amount of generated jobs. Despite this, there is no standardization in the cropping systems presently used, with negative consequences in the yield and quality of the raw material for consumption and for industry. The conversion of traditional orchards to the integrated-fruit-production system will contribute to minimize this scenery. The objective of this work was to compare the integrated fruit production (IFP) and the conventional cropping production (CP) systems in dwarf cashew orchards, as to nut yield and apple quality for fresh fruit market. The experiment was installed in a commercial orchard, located in Beberibe County, Cearà State, Brazil, at two isolated areas of approximately 0,5 hectare each, where the systems of IFP and CP had been developed. In the IFP system, cropping practices were applied according to the Legal Marks of Integrated Fruit Production in Brazil. In the CP system, cropping practices were applied accordingly with common used by local growers. Twelve plants were randomly selected in each area were used as experimental unit. For the yield analyses, the following variables characteristics had been analyzed: nut yield (kg/tree), nut number/tree and nut weight (g). For the apple analyses, production (kg/tree), number/plant and the average weight (g) were evaluated. For the qualitative characteristics, apple color, firmness, soluble solids (SS), titratable acidity (TA), vitamin C content and pH were evaluated. A completely randomized design, with two treatments and 12 replications, with one plant per plot, was used for evaluating yield characteristics. Similar design was used for quality characteristics, but only five replications with six apples per plot. Means were compared by test t (P≤0,05). Significant differences were observed for the variables cashew nut yield, number of commercial nuts and cashew nut total number. IFP mean were superior to the CP one. For the TA and vitamin C content variables, the IFP system was significantly superior to the CP ones. For the pH variable, a significant difference was observed between the averages of the systems, being the value gotten in the CP superior to the one of the IFP. The post-harvest quality of the cashew apples, the cashew nut production and cashew nut number had been influenced by the production systems.

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