Effect of incubation duration of incorporated organic manures on chemical properties of Inceptisol

Abstract

A laboratory incubation experiment of 60 days was carried out at Department of Soil Science and Agricultural Chemistry, Post Graduate Institute, MPKV, Rahuri, during 2020-21 to observe the effect of incubation duration of organic manures on chemical properties viz. pH, electrical conductivity (EC), soil organic carbon (SOC), available nitrogen, phosphorus and potassium. The experiment was laid out in a complete randomized block design (CRD) with three replication and seven treatments. The treatment comprised of (T1) soil + FYM @ 10 t ha -1 , (T2) soil + Vermicompost @ 5 t ha -1 , (T3) soil + Poultry manure @ 5 t ha -1 , (T4) soil + Press mud compost @ 5 t ha -1 , (T5) soil + Goat manure @ 5 t ha -1 , (T6) soil + Urban compost @ 10 t ha -1 and (T7) absolute control. Results indicated that incorporation of organic manures to soil significantly influenced soil properties. The effects of organic manures on soil varied with manure type and incubation period. The application of FYM @ 10 t ha -1 recorded significantly lower pH (7.73). However, the treatment vermicompost @ 5 t ha -1 was at par with treatment FYM @ 10 t ha -1 . The significantly highest EC was recorded with the application of press mud compost @ 5 t ha -1 (1.22 dS m -1 ). The application of poultry manure significantly influenced soil available N, P and K content. The organic carbon content significantly increased at 15 days of incubation and further decreased from 30 days of incubation. The highest organic carbon content was observed with application of FYM @ 10 t ha -1 (0.68% at 15 days of incubation).