| Abstrak/Abstract |
This research was aimed to determine the effect of cow manure and chicken manure on the abundance of soil fauna and N uptake of rice as well as determine the best dose of fertilizer for plants based treatment in the early conversion of conventional to organic farming. Soil sampling was taken three times that is before planting, vegetative phase and generative phase. The abundance of soil fauna was observed that earthworms, nematodes, parasitic and non-parasitic and soil respiration. Earthworm population abundance is observed with ring-samples of PVC, parasitic and non-parasitic nematodes with Tray Technique Whitehead method has been modified, soil respiration was observed by measuring the CO2 in sealed bottles. Total soil of N content was analyzed using the Kjeldahl method, available soil N using Cottenie method and N total tissue using wet digestion with sulfuric acid and peroxide acid. The results of this research showed that cow ma-nure and chicken manure significantly affected the CEC soil, soil total N, abun-dance of worms, the abundance of non-parasitic nematodes, soil respiration, N uptake rice header of vegetative and generative phase and rice production. The combination of the type and dose of fertilizer based on N uptake of vegetative and generative phase as well as plant height and number of clumps showed that treatment P3D3 (cow manure 5 t • ha-1 + chicken manure 5 t • ha-1) was the optimal in the beginning conversion of conventional to organic farming systems with the productivity is 2.04 t • ha-1. |
