Pengaruh Biochar terhadap Pertumbuhan Padi dalam Sistem Aerobik

Abstract

<p>An application of biochar to the intensive weathered soils potentially can change physical and chemical properties of the soils, improved soil function and increased yield of crops. A meta-analyses evaluation showed a significant correlation between biochar and plants productivity, that means there are benefits of biochar application to the soils on plants productivities, that was increased 10%.This experiment was used Randomized Completed Block Design with 8 treatments and 3 replications. The treatments are: contr), 20 ton biochar ha<sup>-1</sup>, 40 ton biochar ha<sup>-1</sup>, 50 ton biochar ha<sup>-1</sup>, 60 ton biochar ha<sup>-1</sup>, 10 ton biochar + 10 ton poultry litter ha<sup>-1</sup>, 20 ton biochar + 20 ton poultry litter ha<sup>-1</sup>, 30 ton biochar + 30 ton poultry litter ha<sup>-1</sup>. The results showed biochar 20 ton ha<sup>-1</sup> could increase significantly of plant heigh, number of punicles per clump, and the weight dried straw per clump. Whereas, application combination 20-30 ton biochar ha<sup>-1</sup> + 20-30 ton poultry litter ha<sup>-1</sup> could increase amount of tillers per clump, amound of punicles per clump, and weight dried straw (total biomass) per clump significantly.</p>

Residual Effect of Rice Husk Biochar on Growth and Yield of Aerobic Rice

“…Biochar and P addition, for example, increased nutrient availability in nutrient-limited soil while also stimulating microbial activity. The same thing was observed at the application of 30 Mg RHB + 30 Mg CPL.ha -1 , where its residual effect significantly increased plant height compared to the control, but in the first growing season nonsignificant (Suswana 2019). Probably, weakly the direct effect of the treatment, might be due to the immobilization of N by microorganisms during the decomposition process of CPL.…”

“…The effect size of biochar was reduced by 53 and 59% for NH3 and N2O, respectively, indicating that the residual effect of biochar on NH3 and N2O persists for at least up to 3 years under field conditions (Fungo et al 2019). The residual effect of application 30 Mg RHB + 30 Mg CPL.ha -1 is nonsignificant in panicle number compared to the control, which was contrary to its direct effect (significantly increased panicle number) (Suswana 2019). It might be due to the decomposition of CPL releasing more nutrient availability and increased microbial activities in the first growing season period than in the second growing season.…”

“…Applied 60 Mg RHB.ha -1 significantly increased panicles number compared to the control, either its direct effect (Suswana 2019) or its residual effect. This evidence might be due to when the plant grows up to the generative stage, the fresh biochar applied has partially oxidized and consequence in increasing CEC, and subsequently affected panicles generating.…”

“…The residual effect of the application of 50 Mg RHB ha -1 has significantly increased plant height compared to the control, whereas it was a nonsignificant effect in the first growing season (Suswana 2019). It might be due to the occurrence of oxidation on the surface of biochar after being applied to the soil.…”

“…The goal of this study was to gather evidence that biochar has a longer effect on enhancing the productivity of aerobic rice (Oryza sativa L.), it was conducted between February and June of 2019. This study is a continuation of the experiment conducted between September and December 2018 (Suswana 2019). As a result, the treatments of the experiment that were intended in this study were the same treatments that were used in the previous study.…”