FERTILIZER RECOMMENDATION FOR PADDY

Content

Introduction Recommendation variation Fertilizer Recommendation-2001 Subsidy scheme Conclusion

Why need Fertilizer ???• The most crucial factor for the yield of rice

is soil nutrients

• The objective of fertilizing is to replenish the soil from loss of soil nutrients via;continuous cultivation on same land removal of harvest and straw leach to soil with water and decomposition

• So to get high yield need fertilizer

Recommendation varies……..

Agro-Climatic Region -According to Agro-Climatic zone’s potential of yield the areas are categorized in to 3 groups;

1. Dry and Intermediate zone2. Upcountry and Mid Country wet and

Intermediate zone3. Wet zone

Age category- 3M,3 ½ M ,4M,4 ½ M

Potential yieldrecommendations for expected yield

80 , 100 ,120 , >140 bushels per acre

Cropping system – Rice-Rice , Rice-vegetable Rice-OFC Soil type

Cont………

Special consideration on 2001 recommendation

1. Improvement of soil fertility

According to latest results SL soils deficit for:

Organic matter 60%Phosphorus 70%Exchangeable

potassium65%

Organic manure recommendation

Following quantities of organic manures are recommended

Along with first ploughing -total amount of previous season rice straw as small heaps

After second ploughing-5t/ha of FYM or compost or poultry litter

(layers)-2.5 t/ha of green manure

At final stage of land preparation250 kg of half burn paddy husk charcoal

Inorganic fertilizer…. DOA always recommend straight fertilizers(cheap and free of adulterant , can be used in

necessary amounts)

Apply BD before sowing or planting and prior to leveling

At 2nd ,5th ,7-8th weeks after sowing apply MOP and TSP

Use more Urea for 2 ½ M and 3M variety

Apply the urea amount in two times with in the particular week for more results

If it is for seed paddy production apply 10 kg of Urea (of 3rd TD) before flowering

2. Inorganic fertilizers –recommended on the basis of yield potential of given area

Agro -ecological zone yield potential

LCWZ and LCIMZ a. 7 t/hab. 6t/hac. 5t/ha

UCWZ , MCWZ and part of a. 5t/haGampaha district b. 4t/ha

LCWZ a. 5t/ha

3.Zink Sulphate

• New recommendation 2001 onwards-until 2001 only N ,P ,K recommended-now 5 kg/ha of ZnSo4 only for Maha season

4. Nitrogen fertilizer

• Basal 12.5 kg/ha of Urea as basal and 3 to 4 applications as TDM Age class No of applications

3 - 3.5 M 34 - 4.5 M 4

5.Phosporus fertilizer

Agro Ecological Zone

Yield Potential (t/ha)

Amount of TSP (kg/ha)

LCDZ and LCIMZ 567

62.587.5112.5

UCWZ and MCWZ

45

62.587.5

LCWZ To all paddy fields

112.5

6. Potassium fertilizerAgro Ecological zone

Yield Potential (t/ha)

Amount of MOP (kg/ha)

LCDZ and LCIMZ

567

Basal At tillering at PI37.5 - 25.037.5 - 37.537.5 - 50.0

UCWZ and MCWZ

45

37.5 - 25.037.5 - 25.0

LCWZ To all paddy fields

37.5 37.5 37.5

Recommendation 1• AEZ : LCDZ and IZ• Districts : Anuradhapura ,Polonnaruwa , Ampara ,Trinco,

Batticalo, Kurunegala,Vavunia and some areas of Ratnapura, Matale,Badulla, Matara,Kandy

• Yield levels :100,120,>140 bushel per acre

Recommendation 2• AEZ :UP and MC wet zone, IZ and part of Gampaha

District• Districts : Nuwara-Eliya and some areas of

Kandy,Badulla,Matale,Gampaha• Yield levels : 80 ,100 bushels per acre

Recommendation 3

• AEZ : LCWZ (soil category 1)• Districts : Colombo ,Kalutara , Galle ,and some

areas of Gampaha , Ratnapura and Matara• Yield levels : 80 bushels per acre only• AEZ : LCWZ (soil category 11)• Districts : Gampaha ( Mirigama ,Attanagalla,

Divulapitita and Minuwangoda• Yield levels : 80 ,100 bushels per acre

Fertilizer Recommendation 1 for Paddy

3 month variety

To obtain 100 bu/ac To obtain 120 bu/ac To obtain 140 bu/ac

Fertilizer (Kg/ac)

Urea TSP MOP Urea TSP MOP Urea TSP MOP

Basal dressing

5 25 15 5 35 15 5 45 15

1st top dressing

35 - - 40 - - 50 - -

2nd top dressing

50 - 10 60 - 15 70 - 20

Total requirement

90 25 25 105 35 30 125 45 35

Source: Rice Research Institution, Batalagoda, 2004

Important

• When use inorganic fertilizers always apply with organic fertilizers

• For higher yielding areas in Gampaha district recommended Urea amount (BD) is higher than other areas

• Areas in Wayamba province which receive higher rainfall a special fertilizer recommendation is

used.

Common fertilizers

Source Nutrient(%) Price (Rs/Kg)

Urea Nitrogen(45) 65.00

Triple Super Phosphate

(TSP)

Phosphorous(21)

70.00

Murate of Potash (MOP)

Potassium (60) 100.00

ZnSo4 Zink 140.00

Factors determining fertilizer use efficiency Soil Crop and variety Season Time of planting Water management Weed control Insect and disease control Cropping sequence Time of fertilizer application

Fertilizer subsidy scheme Main objective: To make available the

fertilizers cheaply and encourage its wider use to enhance the productivity

(High yielding varieties are highly fertilizer responsive)

First introduced in 1962 Urea, Sulphate of Amonia, Muriete of Potash

(MOP) and Triple Super Phosphate (TSP) were subsidized first.

Reintroduced in 1994

Cont……. During the period 1994 to 1997, the fertilizer

subsidy scheme underwent several changes

In 1997 the government decided to restrict the fertilizer subsidy only to Urea

December 2005, the government decided to reintroduce subsidy scheme for all types of fertilizer

by fixing their selling price. However, this scheme is restricted only for paddy farmers.

Expenditure on fertilizer subsidy in Sri Lanka Rs. 6,846 mn in 2005