Utilization of pond mud as fertilizer in an integrated aquaculture-agriculture system
2001
Rivera, J.F. | Aganon, C.P.
Two pot experiments were conducted to determine the effect of pond mud on the yield performance of tomato and pechay and on their nutrient uptake. The treatments used for tomato were: control (No fertilizer), 90-60-60 kg NPK/ha (RR), Full Pond Mud (PM) 1/3 PM + 2/3 RR, 1/2 PM + 1/2 RR, 2/3 PM + 1/3 RR. For pechay the treatments used were: control (No fertilizer), 150-35-35 kg NPK/ha (RR), application of pond mud (APM) daily, APM every other day, APM 3x a week and APM 2x a week. Application of full pond mud increased the number of tomato fruit and yield per plant by 107 and 151 percent over the control, respectively, whereas a yield decrease of 42 percent compared with full inorganic fertilizer was attained. Daily application of pond mud in pechay significantly increased the yield over the control. For both crops, pond mud application increased the N and P content of the plant as well as the N and P uptake. Organic matter, total N and available P of the soil at harvest were higher in pots where pond mud was applied compared to without pond mud application. Percent N recovery was lower in the pond mud treatments in both tomato and pechay pots. However, tomato plants allowed higher N recovery due to greater dry matter yield production as compared to pechay
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