Water application uniformity and fertigation in a dripping irrigation set

Engenharia Agrícola

Adilson L. Borssoi¹  Marcio A. Vilas Boas²  Marcelo Reisdörfer¹  Ricardo H. Hernández¹  Franciele A. C. Follador¹ 

[1] ,Universidade Estadual do Oeste do ParanáCascavel PR

关键词: emitter;    hydraulic performance;    low head;    drip irrigation;    emissores;    performance hidráulica;    carga hidráulica;    irrigação por gotejamento;   

DOI  :  10.1590/S0100-69162012000400011

来源: SciELO

【 摘 要 】

The purpose of this study was to evaluate the uniformity of distribution coefficient (UDC) and coefficient of variation (CV) of a familiar set of irrigation, classifying it the ASAE standard. The irrigation and fertigation are determined by two methods the KELLER & KARMELI and DENÍCULI . The two experiments were subjected to varying pressures: 12, 14, 16 and 18 kPa, in a completely randomized design of twenty samples composed of flows with three replications. Urea, potassium chloride (KCl) and ammonium phosphate (MAP) were the elements used for fertigation. The system consisted of a 200 L tank, which supplied another container of 30 L, it was moved vertically to control the pressure. The data was statistically compared between treatments for each methodology. In fertigation the best pressure was 16 kPa and was classified as "excellent" for UDC (91.03%) and "marginal" for C.V. (7.47%). For the irrigation treatment, the best pressure was 16 kPa rated "excellent" for UDC (91.2%) and "marginal" for C.V. (7.68%). The DENÍCULI et al. (1980) methodology proved more reliable for the evaluation of drip systems. It was observed that this set has good uniformity of distribution, but with great variability in flows.

【 授权许可】

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