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Production Know How
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Weed Management in Wet bed Nursery

 1. Apply any one of the pre-emergence herbicides viz., Pretilachlor + Safener 0.3 kg/ha, on 3rd or 4th day after sowing to control weeds in the lowland nursery.

2. Keep a thin film of water and allow it to disappear. Avoid drainage of water. This will control germinating weeds


Fertilizer Management in Wet bed Nursery

Fertilizer Management in Wet bed nursery is as follows
1. Apply 1ton of fully decomposed FYM or compost to 20 cents nursery and spread the manure uniformly on dry soil.
2. Basal application of DAP is recommended when the seedlings are to be pulled out in 20-25 days after sowing in less fertile nursery soils.
3. For that situation, before the last puddling, apply 40 kg of DAP and if not readily available, apply straight fertilizers 16 kg of Urea and 120 kg of Super Phosphate.
4. If seedlings are to be pulled out after 25 days, application of DAP is to be done 10 days prior to pulling.
5. For clayey soils where root snapping is a problem, 4 kg of Gypsum and 1 kg of DAP/cent can be applied at 10 days after sowing.
6. Apply 1 ton of fully decomposed FYM or compost to 20cents nursery and spread the manure uniformly on dry soil.


Watering of Wet-Nursery

1. Drain the water 18 to 24hrs after sowing.

2. Care must be taken to avoid stagnation of water in any part of the seedbed.

3. Allow enough water to saturate the soil from 3rd to 5th day. From 5th day onwards, increase the water depth to 1.5cm depending on the height of the seedlings.

4. Thereafter maintain 2.5cm depth of water.


Nursery Bed Preparation in Wet-Bed Nursery


Nursery Bed Preparation in wet-bed nursery is done as follows: 1. Mark plots of 2.5m breadth with channels 30cm wide all around the seedbeds. 2. Length of the seed bed may vary from 8 to 10m according to soil and slope of the land. 3. Collect the puddled soil from the channel and spread on the seedbeds. 4. Otherwise drag a heavy stone along the channel to lower it, so that the seed bed is at a higher level. 5. Level the surface of the seedbed, so that the water drains into the channel.

Nursery area required for transplanting and sowing of seeds in nursery


1. 1000 m2 nursery area is required for raising seedlings to plant one hectare land.

2. Sow the sprouted seeds uniformly on the seedbed, having thin film of water in the nursery.

Seed Treatment with Azospirillum :

1. Three packets (600 g/ha) of Azospirillum and 3 packets (600g/ha) of Phosphobacteria or 6 packets (1200g/ha) of Azophos.

2. In bio-inoculants mixed with sufficient water wherein the seeds are soaked overnight before sowing in the nursery bed.

3. Bio-control agents are compatible with bio-fertilizers.

4. Bio-fertilizers and bio-control agents can be mixed together for seed soaking.

5. Fungicides and bio-control agents are incompatible.

Seed Treatment with Pseudomonas fluorescens:

1. Treat the seeds with talc based formulation of Pseudomonas fluorescens 10g/kg of seed and soak in 1lit of water overnight.

2. Decant the excess water and allow the seeds to sprout for 24hrs and then sow.


Seed Treatment for Wet-bed Nursery

1. Treat the seeds in Carbendazim or Pyroquilon or Tricyclozole solution at 2 g/l of water for 1 kg of seeds. 2. Soak the seeds in water for 10 hrs and drain excess water. 3. This wet seed treatment gives protection to the seedlings up to 40 days from seedling disease such as blast and this method is better than dry seed treatment. 4. If the seeds are required for sowing immediately, keep the soaked seed in gunny in dark and cover with extra gunnies and leave for 24hrs for sprouting.


Seed Rate for Wet-Bed Nursery

The Seed rate for Wet-Bed Nursery is

i) 30 kg for long duration varieties (> 140 days)

ii) 40 kg for medium duration varieties (121 - 135 days)

iii) 60 kg for short duration varieties (105 - 120 days)

iv) 20 kg for hybrids (All durations)


Wet-bed Nursery

1. The wet-bed nursery is mainly used in areas where there is enough water.

2. Pre-germinated seeds are broadcast on a soil that is thoroughly puddled and levelled. Drainage canals for proper removal of water must be constructed.

3. Addition of organic manure (decomposed) and small amount of inorganic fertilizer as basal dressing will increase easiness of uprooting of seedlings and seedling vigour.


Types of Nursery

There are five different types of nursery for Rice cultivation in India.They are

1.Wet-bed nursery

2.Dry-bed nursery 

3.Dapog or Mat nursery

4.Modified Mat nursery

5.Bubble tray nursery

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