Search

The research aimed to investigate the effectiveness of organic and inorganic fertilizer combinations on the performance of rice. The research was designed in RBD, 3 replicates, and 14 treatments. The treatments consisted of without fertilizer, 200 kg Urea/ha+300 kg NPK 15:15:15 (Recommended Rates of Inorganic Fertilizers/RRIF), RRIF+500 kg organic fertilizer/ha (100%; 50%,50%; 50%,25%,25%; 33%,33%,33%), RRIF+750 kg organic fertilizer/ha (100%; 50%,50%; 50%,25%,25%; 33%,33%,33%), and RRIF+1,000 kg organic fertilizer/ha (100%; 50%,50%; 50%,25%,25%; 33%,33%,33%). RRIF treatment with a combination of an organic fertilizer dose of 1,000 kg/ha and organic fertilizer application times of 7 HST (50%) and 21 HST (50%) gave the best growth and yield of rice. The time of giving organic fertilizers is 7 DAP and 21 DAP each dose of 50% according to the rice growth phase because rice really needs balanced nutrition at this stage for the formation of tillers after transplanting. The more tillers that are formed, the greater the opportunity to get more yields. The parameters were analyzed using Analysis of Variance (ANOVA) and the means were determined by Duncan's Multiple Range Test (DMRT) 5%. The results showed that the application of RRIF+1,000 kg organic fertilizer/ha (50%, 50%) obtained of grain yield of rice 7.58 ton/ha (increased of 23.25%) from the RRIF, increased the C-organic of the soil 9.79%, R/C-ratio 2.45 and B/C-ratio 1.68. Fertilizers treatment L= RRIF+1,000 kg organic fertilizer/ha (50%, 50%) showed its effectiveness with an effectiveness of 183.14% (RAE >100%). [ABSTRACT FROM AUTHOR]

The paper presents the effect of additional bioactivators and dosage of goat manure on organic fertilizer made from the waste of cocoa pod husk in Malang District. The experimental design of this study is a Randomized Block Design (RBD) with 2 factors (variation of bioactivators and dosage of goat manure) with 4 replications. For the statistical evaluation of a two-way analysis of variance (ANOVA) at the significance level of 0.05. If the significance of F was less than 0.05, pairwise comparisons were made using the Least Significant Difference (LSD) test at a significance on level of 0.05 (α=5%). The results showed that the waste of cocoa pod husk could be used as an organic fertilizer after composting for 32 days, where the application of bioactivator and dosage goat manure did not show a significant effect on parameters of pH, temperature, moisture content, N-total content, and C/N ratio, but for the parameter of C-organic, it showed that the addition of bioactivator and goat manure has very significant interaction. The best treatment of this research on the treatment of bioactivator Decoprima types and dosage of goat manure 1.0 kg (B3K2) with the resulting pH 7.31, temperature 32.53°C, the water content of 32.51%, C-organic 25.62%, N-total 1.95, C/N ratio 13.16 with shrinkage 31.8%. Processing of organic fertilizer from waste cocoa pod husk can increase the value and meet the quality standards of the Minister of Agriculture of the Republic of Indonesia with number 261/KPTS/SR.310/M/4/2019 and Indonesian National Standard 19-7030 2004. [ABSTRACT FROM AUTHOR]