Growth and yield responses of forage sorghum ratoon to different inorganic fertilizers

Abstract

Abstract The purpose of this study was to determine effect of the level of NPK fertilizers on the growth and yield of sweet sorghum forage. Experiment was arranged in a completely randomized design consisting of five treatments and three replications. Each treatment was given a dose of NPK fertilizers (16:16:16) with different doses. The treatments were P1 by 100 kg N/ ha (3,125 g NPK/polybag); P2 by 150 kg N/ha (4,625 g NPK/polybag); P3 by 200 kg N/ha (6,125 g NPK/polybag); P5 = 250 kg N/ha (7,625 g NPK/polybag) and P5 = 300 kg N/ha (9,125 g NPK/polybag). Parameters observed were growth and production of sorghum. Results showed that NPK fertilizer was a significantly (P <0.05) by plant height, internode length and leaf blade length, while stem diameter, leaf width and number of leaves per plant was no significantly (P>0.05). Application of NPK fertilizer was a significant (P<0.05) by production of leaf dry matter, stem dry matter and leaf/stem ratio. It was concluded that NPK fertilizer increased the growth and production of sorghum ratoon.

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