Dissolution of rock phosphate in animal manure soil amendment and lettuce growth

Authors : Kofi AGYARKO, Akwasi Adutwum ABUNYEWA, Emmanuel Kwasi ASİEDU, Emmanuel HEVA

Pages : 84-88

Doi:10.18393/ejss.2016.2.084-088

View : 13 | Download : 7

Publication Date : 2016-04-02

Article Type : Research Paper

Abstract :A study was conducted in pots on the field to assess the effect of different quantities of poultry manure insert ignore into journalissuearticles values(PM);, cattle manure insert ignore into journalissuearticles values(CM); and pig manure insert ignore into journalissuearticles values(PG); on the release of available phosphorus from Togo rock phosphate insert ignore into journalissuearticles values(RP); and lettuce growth. There were eleven insert ignore into journalissuearticles values(11); treatments which were: Control insert ignore into journalissuearticles values(soil only);; 2.5g RP; 2.5g CM; 2.5gRP + 2.5g CM; 2.5gRP + 5gCM; 2.5gPM; 2.5gRP + 2.5gPM; 2.5gRP + 5gPM; 2.5gPG; 2.5gRP + 2.5gPG; 2.5gRP + 5gPG, applied per kg soil, using the Completely Randomized Design insert ignore into journalissuearticles values(CRD); with three replications. Available phosphorus and other parameters were assessed using standard methods. Results were statistically analyzed using the the GenStat insert ignore into journalissuearticles values(11 th Edition); statistical software package. The amount and type of animal manure in the amendment affected the amount of the available P released. The addition of 2.5g manure to 2.5g RP in a kg of soil significantly insert ignore into journalissuearticles values(P<0.05); increased available P by 4 to 7 times over the sole 2.5g RP/kg soil treatment. Doubling the amount of manure in the amendment insert ignore into journalissuearticles values(5g manure + 2.5g RP); almost doubled the amount of P released, with the poultry manure combinations being more significant. The amount of available P in the soil positively related to the plant height insert ignore into journalissuearticles values(R 2 =63);, leaf area insert ignore into journalissuearticles values(R 2 =0.55);, dry weight insert ignore into journalissuearticles values(R 2 =0.73); and the percentage P in the leaf insert ignore into journalissuearticles values(R 2 =0.88); of lettuce. The PM at 2.5gRP + 5gPM recorded the highest significant insert ignore into journalissuearticles values(P<0.05); values. The study has provided further basis for manure selection and quantities to be used in enhancing the release of P from rock phosphate. However, investigations need to be continued using nuclear techniques.
Keywords : Available phosphorus, manure, rock phosphate, soil amendment