Delaying permanent water on drill sown rice

Delayed permanent water (DPW) has proven to be a successful alternative water management practice for rice growing that provides considerable water savings and significant financial benefit. 

The rice crop is sown and initially managed the same as a conventional drill sown crop but permanent water is not applied until late-tillering. The reduced time the crop is growing in ponded water results in lower water use, primarily due to reduced evaporative losses from the water surface, before the crop reaches full canopy cover.

This factsheet provides information on water savings, financial benefit, layouts, sowing requirements, irrigation frequency and timing of permanent water, nitrogen management and weed control.

Brian Dunn, NSW Department of Primary Industries, Primefact 1238, third edition, June 2018