Phosphorus mineralization in response to organic and inorganic amendment in a semi-arid pasture soil

Authors : Shahab Ahmad KHOSA, Kehinde O ERNİLE, Khalid Saifullah KHAN, Muhammad AKMAL

Pages : 26-31

Doi:10.18393/ejss.801099

View : 94 | Download : 14

Publication Date : 2021-01-01

Article Type : Research Paper

Abstract :Phosphorus deficient soil was amended with compost insert ignore into journalissuearticles values(C); insert ignore into journalissuearticles values(organic source of phosphorus); and inorganic P insert ignore into journalissuearticles values(KH2PO4 as inorganic phosphorus); at different rates and incubated for 28 days. Six treatments were used including i); Control ii); Inorganic P insert ignore into journalissuearticles values(0.79 mg per 30 g of soil sample); iii); 100 % C insert ignore into journalissuearticles values(0.13 g); iv); 75% C insert ignore into journalissuearticles values(0.1 g); + 25% P insert ignore into journalissuearticles values(0.2 mg); v); 50% C insert ignore into journalissuearticles values(0.065 g); + 50% P insert ignore into journalissuearticles values(0.4 mg); vi); 25% C insert ignore into journalissuearticles values(0.03 g); + 75% P insert ignore into journalissuearticles values(0.6 mg);. Soil respiration was recorded using Infra-red CO2 gas analyzer. MBC was determined by using fumigation extraction method. Resin P and MBP extraction was carried out by anion exchange membranes and was determined colorimetrically. P pools were determined by using DeLuca method. Cumulative respiration microbial biomass significantly increased in organic amended soil with higher increase in soil emended with 75% C +25% P rate followed by 50% C and 50% P rate. It was concluded that compost amended with high inorganic P stimulated the formation of P labile pools which supply long term slow release of P for plants and microbes.
Keywords : Compost, microbial dynamic, phosphorus pools, pasture soil

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