Fiber Content and Relative Feed Value Estimation of Gamma Irradiated Rice Straw

Abstract

Ionizing irradiation is an alternative treatment to reduce the cell wall constituents and improve the nutritional value of substrates. The purpose of this research was to evaluate the fiber content and relative feed value of rice straw after gamma irradiation treatment. Rice straw was obtained from Sidenuk rice variety. Two polyethylene packages of samples were irradiated in Iradiator Karet Alam (IRKA), Indonesia at doses of 5 and 10 kGy in the presence of air. Treatments includes untreated/unirradiated, 5 kGy and 10 kGy irradiated rice straw. The observed parameters were neutral detergent fiber (NDF), acid detergent fiber (ADF), dry matter digestibility (DMD), dry matter intake (DMI) and relative feed value (RFV) estimation. The change of fiber content was also qualitatively observed by Fourier Transform Mid-Infrared (FTIR). This research was arranged into a completely randomized block design with five replications. The results showed that there was no difference in NDF and ADF content between all treatments. There was also no difference in RFV due to the results of NDF and ADF measurements. Interestengly, there was a strong absorption with a wide and strong band centred at 3331 cm−1 (O-H stretch) only observed in the untreated sample. Meanwhile, a peak signal was observed at 1722 cm−1 only in 5 kGy and 10 kGy irradiated rice straw spectra. This could affect in the increased of hemicellulose compounds after irradiated treatments. It can be concluded that gamma irradiation treatment at doses of 5 and 10 kGy has not been able to influence the fiber content and relative feed value of rice straw. However, there was a tendency for hemicellulose compounds increasingly due to irradiation treatment.

Nutrient Value and In Vitro Digestibility of Pennisetum purpureum cv. Mott under Varying Gamma Irradiation Doses in Acidic Soil

“…The study emphasizes the importance of IR 15 treatment, emphasizing its unique features. Remarkably, IR 15 distinguishes itself by having the lowest lignin value, indicating its potential influence on feed quality (Firsoni et al, 2019). Furthermore, the study shows that IR 15 exhibits improved nutritional digestibility, as indicated by higher values for parameters such as dry matter digestibility (DMD), organic matter digestibility (OMD), crude protein digestibility (CPD), crude fiber digestibility (CFD), and nitrogen-free extract (NFE).…”

Investigation of co-ensiling for the storage of grain stillage and Jerusalem artichoke residue from inulin extraction

“…The RFV represents the digestibility (from a percentage of ADF) and intake potential (from a percentage of NDF) of a feed stuff. As shown in Table S2, the RFV scores of most treatments were assessed as fair (87 to 102) according to the quality grading standard outlined in Firsoni et al (2019). In addition, the RFVs of all the tested groups were higher than the RFVs of quinoa stalks (Filik 2020) and rice straw (Firsoni et al 2019).…”

“…As shown in Table S2, the RFV scores of most treatments were assessed as fair (87 to 102) according to the quality grading standard outlined in Firsoni et al (2019). In addition, the RFVs of all the tested groups were higher than the RFVs of quinoa stalks (Filik 2020) and rice straw (Firsoni et al 2019). Additionally, when the mixing ratio was 1.2 to 1 (M5) and 1 to 1.5 (M6), the RFV of the silage was significantly greater than the RFVs of the other treatment groups, which may be due to the appropriate proportion of silage fermentation helping to reduce the content of the various lignocellulose components, thus increasing the RFV of the silage.…”

Pengaruh iradiasi Gamma terhadap kandungan nutrien, fenol dan aktivitas biologis tanin daun nangka (Artocarpus heterophyllus)

“…Osman et al [24] dan Zarei et al [23] bahkan melaporkan bahwa iradiasi gamma dosis rendah dapat meningkatkan kadar serat kasar dan NDF sampel. Iradiasi gamma dosis 5 kGy mampu meningkatkan ketersediaan hemiselulosa pada substrat jerami padi [25].…”