6. Rice 2/2 Flashcards
Australian brown rice uses how much water compared to the average?
50% less water
Close to 1t of rice is produced per ____ in _____
megalitre of water, Australia
Soil moisture requirements at stage: seed
Best practice is dry sowing prior to rainfall. Seed must germinate with moisture.
Soil moisture requirements at stage: emergence to 4 leaf
Low moisture
Soil moisture requirements at stage: 4 leaf to mid tiller
Moderate moisture requirement
Soil moisture requirements at stage:
Mid tiller to PI
Moderate moisture
Soil moisture requirements at stage: PI to maturity
Saturated profile
PI definition
Panicle Initiation - beginning of the reproductive stage of rice development.
Panicle - inflorescence of a rice plant
80% of required N to be applied into soil when and how?
Drilled into the soil atleast 10cm deep. Prior to planting.
Common weeds in rice fields (8)
- arrowhead
- barnyard grass
- silver top grass
- dirty Dora
- jerry jerry
- starfruit
- water plantain
- leaf miner
Common pest insects
- bloodworm
- leaf miner
- snails
Microspore soil moisture levels are critical because…
- deep water is a highly effective method to protect against cold damage
Microspore formation occurs when
In the middle of the reproductive stage
Durations of panicle to finish microspore and a whole field.
2-3 days
7 days for an entire field (differing growth stages).
Rice water depth until flowering
Minimum of 25cm
Rice cold damage over Microspore growth stage occurs below:
15-17 celcius
To minimise stress prior to reproductive cycle, permanent water must be applied when?
No later than 10-14 days before panicle initiation (PI)
When should rice be harvested
18-22 percent moisture, stems and leaves still green,
Rice should be harvested between what moisture level?
18-22 percent moisture, stems and leaves still green.
Paddy rice is
The entire rice whole grain. Bran, hull and white rice.
17-20% of rice weight is in its
Hull
10-13% of paddy rice weight is in its…
Bran
White rice component of paddy rice is ___% of its weight
70%
WGY stands for?
Whole grain yield
