Effect of Different Levels of Nitrogenous Fertilizers and Additions on Nitrate Accumulation in Com Silages
Whole plant corn fertilized with or without nitrogenous fertilizer during its growth was harvested at milk matured stage for silages. The lactic acid bacteria inoculants Lactobacillus＞6×10 cfu/g, Pediococcus>2×10 cfu/g) was used at 0.01 g/kg of fresh matter. Cellulase (CF) (concluding cellulase, acremmoocium and trichioderma) was used at 0.033 g/kg of fresh matter. And the mixture of lactobacillus and enzyme (LF+CF) were used respectively 0.01 g/kg and 0.033 g/kg of fresh matter. After 45 days, when the silages had been made, opened to air and sampling for the analysis of nitrate contents and nitrite contents at 0, 1, 3, 6 and 10 days. The results showed that, the nitrate content of fertilized corn silages was higher (p<0.05) than that of unfertilized corn silages significantly at the beginning of opening the silages. As the days extension, the nitrate content of all silages trended to decline. For the fertilized corn silages, the nitrate content of untreated silages higher (p<0.05) than that of treated silages and declined sharply throughout the process. This phenomenon appeared from 3 day point to 10 day point for treated silages. For unfertilized corn silages, there was no significant difference between untreated silages and treated silages at 0 day point. The nitrate content of untreated silages sharply declined from 0 day to 10 day point, which of treated silages began at 3 day point. From above, we can conclude that nitrogenous fertilizers can affect the nitrate content of corn silages, and adding LAB and enzyme can retard the nitrate transforming into nitrite.
Corn silages Lactobacillus Cellulose Nitrate Nitrite
Li-ying Han Zhu Yu
Department of Grassland Science China Agricultural University, Beijing 100193 China
国际会议
首尔
英文
180-181
2009-08-10（万方平台首次上网日期，不代表论文的发表时间）