Nutritional value of baled rice straw for ruminant feed

Abstract

-The objectives of this study were to evaluate the effects of cultivation and hay making factors on chemical composition, protein fractionation, and digestibility in rice straw, as well as to identify the chemical fractions that contribute to the variation in its nutritional value for ruminants. Statistical procedures were performed in a model that included rice crop cycle, sowing season, baling season, soil classification, fertilizer application, and productivity (kg/ha) as fixed effects and the hay bale as random effect. Chemical composition, protein fractionation, and digestibility data were subjected to multivariate analyses including factor, cluster, and discriminant. Considering the cultivation and haymaking factors, development cycle, baling season, and grain production explained the most variation in the rice straw nutritional value. Straws derived from early maturing cultivars showed the lowest levels of neutral detergent fiber, acid detergent fiber, acid detergent insoluble nitrogen, and C nitrogen fraction in comparison with straw originating from mid cycle cultivars. Rice straw from more productive cultivars had lower levels of lignin and C fraction as well as higher levels of crude protein and B3 fraction compared with straws from less productive cultivars. However, the main variation in the nutritional value between the samples of rice straw was related to the baling season. The bailing seasons were grouped in two clusters. Straws with better nutritional value were those with lower levels of cell wall fractions, from more productive crops, with early development cycle and baled until March. Rice crop cycle, baling season, and grain production effects explain the variation in the nutritional value of rice straws. Straws with better nutritional value have lower levels of fractions related to secondary cell wall and lignification.

Nutritional assessment of three baled rice straw varieties intended for use as ruminant feed in Namibia

“…Crude protein is generally considered a good determinant of forage quality. The low CP values of 30-50 g/kg reported in the current study (Table 1) are consistent with a number of previous studies (Sophal et al, 2010;Rahman et al 2010;Peripolli et al, 2016;Singh, 2016;Ganai et al, 2017), but lower than the 50-80 g/kg reported by Dong et al (2013) and fall short of the 110-130 g/kg recommended for ruminant maintenance diets (National Research Council (NRC), 2007). Results of this study also showed that per growing and baling year, Angola straw had the highest CP content, while the late maturing SUPA rice had the lowest CP content.…”

“…The highest hemicellulose content was recorded in IRGA 418 and Angola rice straws and this was lower than the 260-333 g/kg DM reported in Brazil (Peripolli et al, 2016), but similar to the 190-250 g/kg reported in India (Malik et al, 2015). Compared to a study in India (Yoswathana & Phuriphipat, 2010), the average cellulose content of rice straw in this study was lower, while the ADL was comparable.…”

Differences in milk metabolites in Malnad Gidda (Bos indicus) cows reared under pasture-based feeding system

“…It has been reported that the nutritional value of paddy straw is lower than alfalfa hay and is a highly lignified material 14 . There is a perception that milk and milk products derived from cows reared in the grazing system are natural and healthier, and hence have high demand in the dairy market 15 .…”

Potensi jerami sebagai pakan ternak ruminansia

“…Hasil penelitian yang dilakukan oleh santos et al (2010) dan Peripolli et al (2016) menunjukkan bahwa nilai nutrisi dari jerami sangat bervariasi. Variasi tersebut kemungkinan disebabkan oleh siklus panen, jumlah produksi beras yang dihasilkan dan waktu pengemasan.…”