Document Type : Research Paper
Authors
Abstract
This experiment was carried out to study the forage yield, nutritional value and fermentation process of corn and sorghum silages. Agronomic and qualitative traits for corn and sorghum forages were evaluated in five row intercropping ratio, which were 100% corn, 75:25, 50:50, 25:75 and 100% sorghum. The experiment was done in a completely randomized design with five treatments and four replications. Approximately, 200 mg of each sample was weighed into a 120-ml serum vial and were incubated. There was significant differences (P<0.05) between treatment in wet and dry forage yield, while treatments contained sorghum were higher than corn (P<0.05). There were significant differences among treatments in silage quality; corn and sorghum silage alone have the highest and lowest respectively. The amount of pH and lactic acid decreased and increased respectively with increasing sorghum ratio in the silage. There was significant difference between dry matter (DM), organic matter, neutral detergent fiber (NDF), acid detergent fiber (ADF) and non fiber carbohydrate (NFC) of different treatments, with increasing of sorghum ratio from zero to 100%, the amount of DM and NFC decreased and amount of NDF and ADF increased. The results of gas production showed differences between treatments in asymptotic gas volume, OMD and ME were significant (P<0.05). With increasing sorghum ratio in silages, the amount of asymptotic gas volume, gas production constant rate, OMD and ME decreased. The results of this experiment showed that maize intercropping with sorghum increased forage production per hectare without any negative effect on silage quality parameters.
Keywords
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