Main content area

Long-Term Effect of Fertilizers and Amendments on Different Fractions of Organic Matter in an Acid Alfisol

Meena, Hari Mohan, Sharma, R. P.
Communications in soil science and plant analysis 2016 v.47 no.11 pp. 1430-1440
Alfisols, animal manures, carbon, continuous cropping, corn, crops, demonstration farms, field experimentation, fulvic acids, grain yield, humic acids, long term effects, microbial biomass, mineral fertilizers, nitrogen, phosphorus, soil microorganisms, stover, straw, sulfur, India
The effect of fertilizers and amendments on organic matter dynamics in an acid Alfisol was studied in a long-term field experiment initiated during 1972 at experimental farm of Department of Soil Science, CSK HPKV, Palampur (India). Continuous application of chemical fertilizers either alone or in combination with farmyard manure (FYM) or lime for 42 years significantly influenced water-soluble organic carbon (WS-OC), water-soluble carbohydrate (WS-CHO), soil microbial biomass carbon, soil microbial biomass nitrogen, soil microbial biomass phosphorus, soil microbial biomass sulfur, humic acid (HA), and fulvic acid (FA). Continuous cropping without fertilization resulted in depletion to the order of 17, 21, 24, 23, 22, 26, 12, and 18% in WS-OC, WS-CHO, microbial biomass carbon, microbial biomass nitrogen, microbial biomass phosphorus, microbial biomass sulfur, HA, and FA, respectively. Different fractions of soil organic matter were found to be positively and significantly correlated with grain and straw/stover yield of wheat and maize crops.