碳酸鉀與乳酸菌對柱花草青貯品質(zhì)的影響
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中圖分類號：S816.53 文獻標識碼：A 文章編號：1007-0435（2025）08-2737-08
Abstract：This experiment was conducted to investigate the efects of adding lactic acid bacteria （LAB）on nutrient composition，fermentation quality and microbial populations of stylo（Stylosanthes guianensis） silage treated with potassium carbonate solutions.Stylo treated with potassium carbonate at diferent concentrations （0% ， 1.5% ， 2.0% ，and 2.5% ）were used as raw materials. Two groups were set up： one with adding lactic acid bacteria（（LAB group）and the other with adding an equal volume of sterile water as the control group （CK group）.After 6O days of ensiling，samples were taken，and the nutritional components，fermentation quality， and microbial counts of the stylo silage were measured. The results indicated that spraying potassium carbonate significantly increased the counts of LAB and aerobic bacteria in the silage （ P<0.05） ，but significantly decreased their water-soluble carbohydrates content （ P<0.05' .The addition of LAB significantly increased the lactic acid content in silage and reduced the pH value of the system （ P<0.05） .However，the ammonia nitrogen content decreased significantly only in the group treated with 2.5% potassium carbonate solutions （ P< O.05），and there was an increasing trend in butyric acid content across diferent potassium carbonate levels. Furthermore，the addition of LAB significantly increased the count of LAB in silage （ ?P<0.05 ）and significantly decreased the water-soluble carbohydrate content （ （P<0.05） . In summary，spraying potassium carbon ate of different concentrations and adding LAB could improve the nutritional value of silage to a certain extent. Therefore， it is recommended to consider adding LAB when preparing semi-dry stylo silage.
Key words：Stylosanthes guianensis;Semi-dry silage;Potassium carbonate;Lactic acid bacteria;Silage quality
柱花草（Stylosanthes guianensis），亦稱巴西苜蓿，憑借其豐富的營養(yǎng)價值、高蛋白質(zhì)含量及全面的氨基酸組成，已成為我國南方地區(qū)不可或缺的優(yōu)質(zhì)豆科牧草資源，對推動當?shù)匦竽翗I(yè)發(fā)展具有重要意義[1]。（剩余12930字）