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

Abstract

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).

Mineralization of phosphorus as influenced by different organic and inorganic sources of phosphorus in calcareous soil

“…The lowest among the combination treatment of inorganic and organic was observed in SSP+FYM (15.68 mg kg -1 ). The results are also in conformity with the results of Abbasi et al (2015) [1] , Naima et al (2015) [9] and Thite et al (2021) [19] .…”

“…The decline in P release after 45 days in organic treatment could be due to meagre P supply power of organic sources and fixation of P as tricalcium phosphate during later days of incubation. The results are aligned with the results of Thite et al (2021) [19] who reported highest P release in POL treatment as compared to VC and FYM at 45 DAI and a decline in P availability thereafter in all organic treatments. Tamboli et al (2016) [18] reported that 50% recommended dose of phosphorus through inorganic fertilizer and rest through PMC significantly increased soil available phosphorus.…”

“…SSP+FYM (14.44 mg kg -1 ). Similar results are also reported by Naima et al (2015) [9] and Thite et al (2021) [19] .…”

“…(2021) [19] reported that the P release increased due to combine application of organic and inorganic as compared to only inorganic during latter hours of incubation.…”

“…The availability of P in calcareous soils as P from manure changes in soil phosphorus availability with poultry compost. The application of poultry manure @ 5 t ha -1 had distinct effect on N, P, and K content in soil, followed by application of press mud compost @ 5 t ha -1 which had a significant effect on soil properties under 60 days incubation study (Thite et al 2021) [19] . The application of poultry manure compost or organic fertilizer increased the available phosphorus (P) and organic matter content in all soils; however, the quantity of P and organic matter decreased with an increase in incubation time.…”