Nutrient Quality and Digestibility Improvement of Suwan Corn Ensiled with Microorganisms by in vitro Technique
Keywords:
corn silage, Bacillus subtillis, microbial activator super LDD2, silage quality, in vitro techniqueAbstract
Inoculation of Bacillus subtillis (BS) in corn silage improves the quality of the silage. Moreover, the microbial activator super LDD2 (LDD2) contains microorganisms that digest fiber and can produce lactic acid. Therefore, the objective is to use BS and LDD2 to ensile with corn to improve the quality of silage and its digestibility in the rumen. The experiment was designed as a 3 × 4 factorial, completely randomized design. Three Suwan corn varieties were used: 4452, 5731, and 5819 (factor 1) along with four groups of microorganism inoculations: whole plant corn, corn silage, corn silage ensiled with BS and corn silage ensiled with LDD2 (factor 2). The results showed that the corn varieties did not affect the quality and digestibility of corn silage (P>0.05), but did affect neutral detergent fiber and soluble carbohydrates (P<0.05). The interaction between corn varieties and microbial inoculation affected crude protein in corn silage (P<0.05). Inoculation of Bacillus subtilis and microbial activator super LDD2 resulted in an increase in crude protein (P<0.05). In addition, the digestibility of dry matter, crude protein, and neutral detergent fiber in the microbial inoculation treatments was better than the control corn silage (P<0.05). These treatments also resulted in a higher total bacterial count (P<0.05) and increased total volatile fatty acids in the rumen (P<0.05). Therefore, ensiling Suwan corn with BS and LDD2 can increase the quality of corn silage, affecting its nutritional value and digestibility, and can be considered an alternative option for improving roughage quality.
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