As of my last knowledge update in September 2021, there were several innovative rice cultivation techniques being explored. However, I don't have access to information beyond that point. Some of the techniques being researched and implemented at the time included:

1. System of Rice Intensification (SRI): 
SRI emphasizes the use of organic fertilizers, transplanting younger seedlings, and maintaining intermittent water irrigation, leading to increased yields and reduced water requirements.

2. Aerobic Rice Cultivation:
This technique involves gr /owing rice in well-drained, non-flooded fields, which reduces water usage while improving weed control and nutrient uptake. It requires specific rice varieties and careful management.

3. Alternate Wetting and Drying (AWD):
AWD is a water-saving technique where farmers allow the paddy fields to dry periodically instead of keeping them continuously flooded. This method reduces water consumption while maintaining yields.

4. Conservation Agriculture:
This approach promotes minimum soil disturbance, permanent soil cover, and crop rotation. It helps to conserve moisture, prevent soil erosion, and improve overall soil health, leading to sustainable rice production.
Please note that agricultural research and advancements continue to evolve, so there may be more recent developments in rice cultivation techniques. It would be best to consult up-to-date agricultural resources or experts for the latest information on new techniques.