Grapevine is not only a highly economic-valued fruit-tree kind but also suitable for the climate and soil conditions Ninh Thuan province. The water resource used for grapevine irrigation in Thai An village is mainly supplied by the groundwater. However, during the 3-year lasting drought (from 2014 to 2016), the groundwater has become exhausted and been affected severely by saltwater intrusion, resulting in many uncultivated plots of land. The local households have used a combination of water for domestic use with underground water as a replacing irrigation water resource in the context of water storage. This, costing about VND 20 million per ha per month (according to the information provided by the farmers in the survey in September 2015), has caused the reduced economic efficiency and waste of water, and will form bad habit and awareness of water-use for the people in the future.
Therefore the drip irrigation model is designed for automatically conveying water from Nuoc Ngot (fresh water) lake to the irrigation area about 5km far from the lake.
Nuoc Ngot lake
“Under the drip irrigation with low-pressure, self-flowing water is supplied from Nuoc Ngot Lake to the plants through main pipeline, branch pipes, drip taps", said the Project Management Unit (PMU)’s technical staff.
It is estimated that the above irrigation model, if applied, will save between 30% and 60% of water amount compared to the traditional strip irrigation. In addition, through the drip irrigation system, fertilizer can be directly mixed into the water which is very convenient for the daily fertilizer supply to crops and minimizes fertilizer loss due to evaporation or leaching once over-fertilizing at the same time. The drip irrigation does not result in partial waterlogged land like strip irrigation strengthening the development of the roots as well as the growth of the grapevines. Besides, the land will be kept dry and restricted weeds while the soil porosity and properties will be improved.
Economically, drip irrigation model reduces the production cost for grapevines, specifically reduction of labor irrigation, caring, weeding and amount of chemical fertilizers. Application of this advanced technology will definitely bring the farmers production cost reduction and so economic efficiency increase.
The pilot work was commenced in January, 2018 and expected to complete in May, 2018. The pilot project, once completed, is planned to be widely disseminated through communication activities to the other regions of the province.