Plot level assessment of irrigation water savings due to the shift from sprinkler to localized irrigation systems or to the use of soil hydric status probes. Application in the French context

摘要: Abstract In order to reduce irrigation water withdrawal, the European Commission provides grants farmers for investments in techniques that save water. However, little is known about real extent of savings at plot scale resulting from change application equipment or adoption scheduling devices a given agro-pedo-climatic context. The aim this study was evaluate achievable by switching sprinkler localized system using soil hydric status probes. For purpose, we used French metropolitan context our case and compiled all available studies conducted over past 30 years. A total 93 records were collected experimental field trials representative wide range pedo-climatic conditions (25 different sites) crops (field crops, fruit vegetable production). Each record represents consumption two systems (sprinkler vs system) (without probe with probe) assess saving made when comparing most consuming least one. Results show are highly variable, ranging 0% more than 75% initial consumption. They originate both technology management. Their key features following. (1) Water systems, compared irrigation, significantly decrease deficit cropping season increases holding capacity rises. Moreover, they tend be higher managed (2) obtained probes (when without probes) seem, on contrary, not influenced capacity. type (tensiometric capacitive) has no influence obtained. (3) achieved either result increased productivity only marginally crop type. This frame reference can guide public policies encouraging financially supporting implementation subject devices, but also tools.