Feeding value of rice (Oryza sativa L.) herbage for ruminants
1990
Zulkarnaen, F.
The herbage yields obtained from lowland rice cultivars were higher than those of the deepwater rice cultivars. Significantly higher herbage yields (P0.05) was obtained at 60 DAT [days after transplanting] compared to 40 DAT. The mean herbage yields among cultivars were significantly different (P0.05) at 40 and 60 DAT cutting interval. Lower DM [dry matter] content (P0.05) was obtained at 40 DAT compared to 60 DAT. However, DM content were similar among cultivars. Deepwater rice cultivars had generally higher CP [crude protein] contents than the lower rice cultivars. Crude protein content was significantly affected (P0.05) by cultivars and cutting interval. Higher CP content (P0.05) was obtained with 40 DAT compared to 60 DAT. Similar levels of NDF [neutral detergent fiber] contents was observed among cultivars, but a significant (P0.05) difference was observed between the pruning stages. There were significant (P0.05) differences in acid detergent fiber contents among cultivars and pruning stages. Hemicellulose contents were significantly (P0.05) different between pruning stages but not among cultivars. The in vitro true dry matter digestibility (IVTDMD) was significantly different (P0.05) among cultivars and pruning stages. Except for CP, IVTDMD was negatively correlated with DM and NDF. Rice herbage cut at 40 or 60 DAT have high IVTDMD coupled with high levels of CP and low NDF. Rice herbage is similar to legumes and would serve as good supplement to enhance the feeding value of the low quality roughages.
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