Paddy-SRI method fertilizer management
- Thread starter victorka
- Start date
Hi Siddhartha,
In a previous message to us you mentioned about already planting paddy for 2 hectares. ARe you taking up additional planting of paddy?? If so which variety and which area?? HAve you got the soil analysed?? Based on the results the appropriate dosage can be recommended. The general dosage for paddy are
Apply organic manure in the form of farmyard manure or compost or green leaf @ 5 t ha-1 and incorporate into the soil while ploughing. Vermicompost or coirpith compost @ 2.5 t ha-1 can be substituted for 5 t ha-1 FYM
Application of 25 per cent of the nutrient requirement as organics and 75 per cent as fertilizers during kharif season and reducing the fertilizer dose of rabi by 25 per cent gives comparable yield with full POP recommendation during both seasons.
A fertilizer dose of N
2O5:K2O 20:10:10 kg ha-1 for the first crop and 30:15:15 kg ha-1 for the second crop is recommended for high yield .
For pre-planting application, apply the fertilizers at the final ploughing. In areas where availability of water is assured, temporarily draining the field one day prior to application and re-flooding after twelve hours is recommended for top dressing of fertilizer.
For increasing the efficiency of urea for top dressing, mix urea with six times its weight of slightly moist soil and apply to the field 24-28 hours after mixing. Oil seed cakes such as punna and neem cakes can also be mixed with urea (1 part of oil cake + 5 parts of urea by weight) for increasing fertilizer use efficiency. This method is particularly useful for basal application of nitrogen. Under special conditions of drought and water-logging, apply nitrogen as foliar spray. Urea may be applied as a low volume spray at 15 per cent concentration using power sprayer or at 5 per cent concentration using a high volume sprayer, the quantity applied in one application being limited to 15 kg ha-1.
When zinc deficiency is noticed, apply zinc sulphate @ 20 kg ha-1. Early stages of zinc deficiency are evidenced by interveinal chlorosis, bleaching of midribs and light yellow colouration of the leaf. Older leaves develop brown rusty spots and are extremely brittle. Zinc sulphate and potash should not be applied on the same day.
The effect of zinc application can persist upto five years depending on the soil and cropping pattern. Hence soil application is not required for every season. Soil zinc status should be monitored before application to avoid accumulating toxic concentration of zinc.
Split application of water-soluble phosphatic fertilizers in two equal splits as basal and at maximum tillering stage is effective in giving higher grain and straw yield than the full dose as basal dressing under certain situations.
When the soil has less than 10 ppm of calcium chloride extractable sulphur or 15 ppm of phosphate extractable sulphur, substitute urea with ammonium phosphate sulphate to correct sulphur deficiency. For medium duration rice grown in brown hydromorphic soils ammonium phosphate sulphate may be used to supply 25 kg sulphur per hectare to protect the crop from sulphur deficiency (ad hoc recommendations).
Application of magnesium as basal dose in the form of magnesium sulphate (16 per cent MgO) or magnesite (40 per cent MgO ) or dolomite (10 per cent MgO) @ 20 kg MgO/ha is effective in giving a significant increase in grain and straw yield of rice in magnesium deficient soils. In non-deficient soils, a marginal increase in grain and straw yield is also obtained. On per unit MgO basis, magnesite is more concentrated and cheaper than magnesium sulphate.
In general, addition of lime is absolutely necessary when the pH is lower than 5.5 and it is advisable when pH varies between 5.5 and 6.5.
Apply lime @ 600 kg ha-1 in two split doses, the first dose of 350 kg ha-1 as basal dressing at the time of first ploughing and the second dose of 250 kg ha-1 as top dressing about one month after sowing/transplanting.
Regards
Ashwini S
In a previous message to us you mentioned about already planting paddy for 2 hectares. ARe you taking up additional planting of paddy?? If so which variety and which area?? HAve you got the soil analysed?? Based on the results the appropriate dosage can be recommended. The general dosage for paddy are
Apply organic manure in the form of farmyard manure or compost or green leaf @ 5 t ha-1 and incorporate into the soil while ploughing. Vermicompost or coirpith compost @ 2.5 t ha-1 can be substituted for 5 t ha-1 FYM
Application of 25 per cent of the nutrient requirement as organics and 75 per cent as fertilizers during kharif season and reducing the fertilizer dose of rabi by 25 per cent gives comparable yield with full POP recommendation during both seasons.
A fertilizer dose of N
2O5:K2O 20:10:10 kg ha-1 for the first crop and 30:15:15 kg ha-1 for the second crop is recommended for high yield .For pre-planting application, apply the fertilizers at the final ploughing. In areas where availability of water is assured, temporarily draining the field one day prior to application and re-flooding after twelve hours is recommended for top dressing of fertilizer.
For increasing the efficiency of urea for top dressing, mix urea with six times its weight of slightly moist soil and apply to the field 24-28 hours after mixing. Oil seed cakes such as punna and neem cakes can also be mixed with urea (1 part of oil cake + 5 parts of urea by weight) for increasing fertilizer use efficiency. This method is particularly useful for basal application of nitrogen. Under special conditions of drought and water-logging, apply nitrogen as foliar spray. Urea may be applied as a low volume spray at 15 per cent concentration using power sprayer or at 5 per cent concentration using a high volume sprayer, the quantity applied in one application being limited to 15 kg ha-1.
When zinc deficiency is noticed, apply zinc sulphate @ 20 kg ha-1. Early stages of zinc deficiency are evidenced by interveinal chlorosis, bleaching of midribs and light yellow colouration of the leaf. Older leaves develop brown rusty spots and are extremely brittle. Zinc sulphate and potash should not be applied on the same day.
The effect of zinc application can persist upto five years depending on the soil and cropping pattern. Hence soil application is not required for every season. Soil zinc status should be monitored before application to avoid accumulating toxic concentration of zinc.
Split application of water-soluble phosphatic fertilizers in two equal splits as basal and at maximum tillering stage is effective in giving higher grain and straw yield than the full dose as basal dressing under certain situations.
When the soil has less than 10 ppm of calcium chloride extractable sulphur or 15 ppm of phosphate extractable sulphur, substitute urea with ammonium phosphate sulphate to correct sulphur deficiency. For medium duration rice grown in brown hydromorphic soils ammonium phosphate sulphate may be used to supply 25 kg sulphur per hectare to protect the crop from sulphur deficiency (ad hoc recommendations).
Application of magnesium as basal dose in the form of magnesium sulphate (16 per cent MgO) or magnesite (40 per cent MgO ) or dolomite (10 per cent MgO) @ 20 kg MgO/ha is effective in giving a significant increase in grain and straw yield of rice in magnesium deficient soils. In non-deficient soils, a marginal increase in grain and straw yield is also obtained. On per unit MgO basis, magnesite is more concentrated and cheaper than magnesium sulphate.
In general, addition of lime is absolutely necessary when the pH is lower than 5.5 and it is advisable when pH varies between 5.5 and 6.5.
Apply lime @ 600 kg ha-1 in two split doses, the first dose of 350 kg ha-1 as basal dressing at the time of first ploughing and the second dose of 250 kg ha-1 as top dressing about one month after sowing/transplanting.
Regards
Ashwini S
Hi Siddharth,
The SRI method (system of Rice INtensification)... main points to be considered
1.Carefully transplant single seedlings at two-leaf stage (8-12 days)
2.Plant seedlings at a distance of 25 cm or more in a square pattern
3.Keep soil moist and aerated. Fertilize with compost - add chemical fertilizer only if needed
Regards
Ashwini S
The SRI method (system of Rice INtensification)... main points to be considered
1.Carefully transplant single seedlings at two-leaf stage (8-12 days)
2.Plant seedlings at a distance of 25 cm or more in a square pattern
3.Keep soil moist and aerated. Fertilize with compost - add chemical fertilizer only if needed
Regards
Ashwini S
Thank you very much Mr. Ashwini.
This is really helpful for my cultivation.
I will apply fertilizer as per your recommendation.
As per your your query, I have already plated paddy at 2 hectares area and I am looking forward for SRI in another 2 hectares area.
As per your recommendation for SRI: "add chemical fertilizer only if needed".
Please advice me how I can know that the chemical fertilizer is needed for the SRI cultivation.
Can I use the same dose as per your recommendation for normal paddy cultivation.
Regards,
Siddhartha.
This is really helpful for my cultivation.
I will apply fertilizer as per your recommendation.
As per your your query, I have already plated paddy at 2 hectares area and I am looking forward for SRI in another 2 hectares area.
As per your recommendation for SRI: "add chemical fertilizer only if needed".
Please advice me how I can know that the chemical fertilizer is needed for the SRI cultivation.
Can I use the same dose as per your recommendation for normal paddy cultivation.
Regards,
Siddhartha.