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Revista Ciencias Técnicas Agropecuarias

versão On-line ISSN 2071-0054

Resumo

CUN GONZALEZ, Reinaldo; PUIG ESTRADA, Omar; MORALES GOMEZ, Carlos  e  DUARTE DIAZ, Carmen. Evaluation of the irrigation uniformity in drip liner under green house conditions. Rev Cie Téc Agr [online]. 2011, vol.20, n.1, pp.36-39. ISSN 2071-0054.

There are 673 greenhouses in Cuba, their dimensions ranges between (12 m x45 m y 20 m x 40 m) and they belong to 24 modules spread along 13 provinces with a production of (200 t·ha-1 y 300 t·ha-1 ) vegetables mearly. In this units drip irrigation is used. To obtain good quality harvestings is important that the systems perform with a high uniformity. The research was developed with the main objective of determining the irrigation uniformity through the calculation of the uniformity coefficient (Cu) of the system working with one lateral on the furrow and with two lateral of dripper on the bed under production conditions. The study was carried out in the module of greenhouses ¨Las Guásimas¨, located in Arroyo Naranjo municipality in Havana province to 23° 00'; 33,12 North latitude and 82° 17'; 42,57 longitude West, to 92 m on the sea level. The results demonstrated emitters work with good uniformity in the rates (> 80%), but outside of the value recommended by the manufacturer (2 L·h-1) for both situations. The general Cu of the systems was excellent and good (> 80 and> 90%). We conclude that it was higher the coefficient of uniformity of the rate and the system in general when a lateral by furrow instead of two. The irrigation systems in these productive units operate with higher pressures to those stated by the project, that´s why the rate of the originators is superior to those outlined by the maker.

Palavras-chave : emitters; irrigation unit; irrigation lateral; expense of the emitter; working pressure.

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