IMPROVING POMEGRANATE FERTIGATION AND NITROGEN USE EFFICIENCY WITH DRIP IRRIGATION SYSTEM
Water Management Research
2010 Annual Report
1a.Objectives (from AD-416)
Determine real time seasonal nitrogen requirements to improve FUE of young and maturing pomegranates using drip and subsurface drip irrigation. Determine required level of nitrogen to maintain N levels in maturing pomegranates. Determine effect of N fertilization on macronutrient concentrations.
1b.Approach (from AD-416)
The project will use a complete randomized design of 2 irrigation treatments and 3 fertilization treatments with 5 replications. The water requirement will be determined by weighing lysimeter and the fertilization will be determined by tissue sampling in years 2 and 3 of the project. This is a field project on 2 acres. Documents Reimbursable with CDFA. Log 40504.
This agreement was established in support of Objective # 1 (Determine new water requirements and develop improved management practices and systems for irrigated crops to promote efficient resource use and water quality protection) of the in-house project and the goal was to determine the water requirements of horticultural crops grown in arid and semi-arid areas. The pomegranate trees were donated by Paramount Farms and the planting was completed in April 2010. The subsurface drip tubing was installed on the field site located on the Kearney Agricultural Center along with the filter set for the drip system. The remaining materials have been ordered to complete the installation of the surface and subsurface drip irrigation. The trees are being irrigated manually while the drip system installation is completed.