BIOFERTILIZER BIOTECHNOLOGYBiofilm inoculants & Rhizobial Inoculants

S. A. Kulasooriya and Gamini SeneviratneNational Institute of Fundamental Studies, Hantane Road,

Kandy, Sri Lanka

Control

50% CFs

100% CFs

BFBFs

BFBFs + 50% CFs

100%N

Inoculation

Control

100%N+PM

Inoculation

Control

100%N+PM

Inoculation02468

101214161820

Hanguranketha

Rikillagaskada

Doragala

(ii) Vegetable Bean- Fresh pod yield (kg/m2)

Con N -fert Strain-1 Strain-2 Slurry165

170

175

180

185

190

195

200

205

210

FP RH BFBF140145150155160165170175180 14%

7%

N-Fertilizer Inoculant Cont0

500

1000

1500

2000

2500

3000

3500

4000

(i) Soya bean Seed yield (Kg/ha)

CONCLUSIONS• Biofilm biofertilizers can replace 50% N, P

& K chemical fertilizers without any reduction in yield of tea, rice, maize, potato, carrot, tomato, capsicum and straw berry.

• Rhizobial biofertilizers can replace 100% chemical N-fertilizer without any reduction in yield of soybean, vegetable bean, cowpea, mung bean and the forage legume white clover.