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Sunday, 2nd October 2022 || १६ असोज २०७९, आईतबार

4 methods for the preparation of rice seedlings for transplanting

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२०७८ जेठ ३१ , सोमबार ०१:०६ मा प्रकाशित | १२७१ पटक पढिएको

  1. Wet bed

Use this method in areas with sufficient water supply. Allot 1/10 of the field for the seedbed area, and prepare 40 kg of seed to transplant 1 ha of land.

  • Prepare beds at 1 m wide by convenient length. Raise the soil to 5−10 cm height.
  • Broadcast pre-germinated seeds in thoroughly puddled and leveled soil.
  • Construct drainage canals for proper water removal.
  • Add organic manure (decompose) and a small amount of inorganic fertilizer as basal dressing. This increases seed vigor and allows easier uprooting for transplanting.
  • Transplant seedlings at 15−21 days old.

2. Dry Bed

Prepare the nursery in dry soil conditions. Ensure that the site is free of shade and has access to irrigation facilities. Allot 1/10 of the field for the seed bed area, and prepare 60−80 kg of seed to transplant 1 ha of land.

  • Prepare beds at 1 m wide by convenient length. Raise the soil to 5−10 cm in height.
  • Distribute a layer of half burned paddy husk on the nursery bed to facilitate uprooting.
  • Prevent moisture stress by irrigation. Without appropriate moisture, roots may be damaged during pulling.
  • If nutrient supply is low, apply basal fertilizer mixture and incorporate it between rows.
  • Transplant seedlings at 15−21 days old. 

Seedlings raised in dry-bed are short, strong, and has a longer root system than those raised in wet beds. Dapog or mat method is most appropriate for growing short-duration varieties, as seedlings experience less transplanting shock. Compared to other methods, this requires less labor and has minimal root damage.

3. Dapog Method

Prepare dapog nurseries where a flat firm surface is available and the water supply is very reliable. Allot 100 m2/ha or 1% of the field for the seedbed, and prepare 40−50 kg of seed per ha.

  1. Mark out 1 m wide and 10−20 m long plots.
  2. Cover the surface with banana leaves, plastic sheets, or any flexible material from penetrating the bottom layer of the soil. Cemented floors may also be used as a base. Form the boundary with bamboo splits or banana sheath.
  3. Cover the seedbed with about 1 cm of burned paddy husk or compost.
  4. Sow pre-germinated seeds on the seedbed. Maintain a thickness of 5−6 seeds (1 kg per 1.5 m2).
  5. Sprinkle water to the seeds after sowing, and then press down by hand or with a wooden flat board. 
  6. Prevent water stress by irrigation.
  7. Transplant seedlings at 9−14 days old.

4. Modified dapog method

The modified mat nursery uses less land and requires fewer seeds and inputs (i.e., fertilizer and water). Allot 100 m2/ha for the seedbed, and prepare 18−25 kg of good quality seeds.

  1. Cover the surface of 4 cm layer  soil mix with banana leaves, plastic sheets, or any flexible material from penetrating the bottom layer of the soil. 
  2. Sow pre-germinated seeds on the seedbed, then sprinkle with water. Maintain a thickness of 2−3 seeds.
  3. Water the nursery 2 times a day for 5 days.
  4. Transplant seedlings at 15−21 days old, when seedlings reach the four-leaf stage.
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preparation of rice seedlings for transplanting

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