The Key Point of CR83 Seed Production

1. Seedling stage

350kg compound fertilizer, 75kg urea, 30kg zinc (Zn), 35kg carbofuran for 1 Hectare seedling bed.

Each Hectare production field demands 0.05 hectares seedling bed for male and 0.15 hectares for female. Sowing quantity is 7.5kg male seeds and 25-30kg female seeds.

Male sowing amount is 225kg-300kg for One hectare seed bed and female is 375kg-450kg.

First phase male sowing time is 20 days earlier than female, around 5.2 leafs different.

Second phase male 7 days later than the first.

After 3 leaves stage use 75kg/Ha urea as topdressing.

2. Field cultivation and transplanting

600kg compound fertilizer, 150kg urea, 30kg zinc (Zn)for 1 Hectare.

Male transplanting: 28-30days seedling age , around 8 leaf age .

Female transplanting: 18-20days seedling age , around 5 leaf age .

Bed width 1.8m, 1 line male, 10 line female each bed. Male to female 23cm distance for field work.

Transplant two different phase Male seedling cross as 2 by 2.

Female density 15cm by 17cm two plants each hole.

3. GA3 management

300-375g/Ha, 3 times within 3 days:

First time is at female 10-15% heading stage , use 75g/Ha.

Second time is at 20-25% heading stage , use 120g/Ha, at the same time use 30g for male.

Last time is at 40-50% heading stage, use 120-150g/Ha.

Timing is 8-9am or 2pm.