Mountains in the Chaning World, Mountains in the Chaning World

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EFFECT OF ORGANIC AND CHEMICAL FERTILIZERS ON SOIL BACTERIA AND FUNGI BIOMASS
Salina Panta, Roshan Babu Ojha, Chandeswor Prasad Shriwastav, Indira Bhattarai

Last modified: 2017-08-08

Abstract


ABSTRACT

Organic farming has great importance over chemical farming in the human health, soil health and ecological concern than only production benefits. To study the effect of different fertilizers on soil bacterial and fungal biomass in broccoli field under the climatic condition of chitwan, the research was undertaken at Agriculture and Forestry University from Sep, 2015 to Feb, 2016. Research was conducted in calabrese variety of broccoli with ten treatments viz; recommended chemical fertilizer (380:180:80 kg NPK ha-1), Farm Yard Manure (FYM), Vermi-compost (VC), Cow urine (CU), Bio organic fertilizer (BOF), (NPK 50%+FYM 50%), (FYM 50%+CU 50%),(FYM 50%+VC 50%),(FYM 50%+BOF 50%) and {25% (FYM+VC+CU+BOF)} in RCBD replicated three times with spacing of 60×45cm2 and plot size of 5.4m2. To find the soil bacterial and fungal biomass, serial dilution method was used. The study revealed that the highest bacterial populations (after 48 hrs.) with dilutions 10-5 and 10-6 was observed (37.6 x 106) and (43.6 x 107) respectively in the treatment combining all four organic fertilizers {25% (FYM+VC+CU+BOF)} whereas in recommended NPK fertilizer, the bacterial population with dilutions 10-5 and 10-6 was observed to be (3.21 x 106) and (4.10 x 107) respectively. Likewise, highest soil fungus populations (after 72 hrs.) with dilutions 10-5 and 10-6 was observed (10 x 105) and (11 x 106) respectively in the treatment combining all four organic fertilizers whereas in recommended NPK fertilizer, the fungus populations with dilutions 10-5 and 10-6 was found to be (6.19 x 105) and (7.1 x 106) respectively. Thus, the result showed the enhanced soil microbial biomass in the organic fertilizer applied soil.

Key words: soil fungus and bacteria, biomass, fertilizers, serial dilutions


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