Utilization of by-Product of Monosodium Glutamate Industry (Ami-Ami) as Fertilizer for Cassava

Abstract

The affects of chemical fertilizer ami-ami, and a mixture of bath chemical fertilizer mixed with ami-ami on yields of Cassava, namely Kasetsart 50, and loamy sand (Sai Ngam soil series) were studied over a two-year period. The trial was carried out as Randomized Complete Block Design with 3 replications. The treatments comprised of 1) application of 15-15-15 rate 50 kg.rai-1 to the soil, 2) application of 15-15-15 rate 100 kg.rai-1 to the soil, 3) application of 15-15-15 rate 50 kg.rai-1 and ami-ami rate 150 L rai-1 to the soil, 4) application of ami-ami rate 300 L rai-1 to the soil and 5) application of ami-ami rate 300 L rai-1 to the soil. The results indicated that fresh root yield obtained from the 1st cropped year was not significant affected by any of the treatments.The averaged yield was 4,599 kg.rai-1 on the other hand, in the 2nd cropped year the application of 15-15-15 rate 100 kg rai-1 and 15-15-15 rate 50 kg rai-1 plus ami-ami rate 150 L rai-1 gave higher significant (P≤0.05) root yields than the application of 15-15-15 rate 50 kg rai-1 and ami-ami rate 600 L rai-1 (8,177, 8,221 vs. 6,205, 6,224 kg. rai-1) respectively. Moreover, more soil acidity, nitrogen and phosphorus contents were found in the treatments applied with 15-15-15 rate 100 kg rai-1 and all rates of ami-ami whereas soil organic matter, potassium, calcium and magnesium did not differ in all fertilized treatments and decreased after finished the 2nd cropped year.