南方典型栽培草地山羊有效放牧时间研究

Study on the Effective Grazing Time for Goats on Typical Cultivated Grassland in Southern China

采用跟踪观察法和称重法,研究了贵州黑山羊在南方典型栽培草地上的牧食行为变化及羊只体重增量趋势.结果表明：放牧第1～6h山羊以采食行为为主,采食时间显著高于第7h、第8h（P＜0.05）,而第7h、第8h以站立、卧息行为为主,二者时间均显著高于第1～6h（P＜0.05）;随着放牧时间（4h、6h和8h）增加,山羊体重增量呈递增趋势,而增重速度呈下降趋势,且各组间增重差异不显著.综上所述,在南方典型栽培草地上,山羊有效放牧时间为6h,而以4h为最佳.

On typical cultivated grassland in Southern China, the grazing behavior and weight gain of Guizhou black goat were studied by means of tracking observation and weighing. The results showed that the main behavior of goats in the first six grazing hours was ingestion, the time of which was significantly higher than that of the 7th and 8th hour （P〈0.05） ; the main behavior of goats in the 7th and 8th hour were standing and resting, the time of which was significantly higher than that of the first six hours （P〈 0.05）. With the increasing of grazing time （4, 6 and 8h）, the weight gain of goats showed an increasing trend, but the rate of weight gain slowed down and there were no significant differences among the three groups. In conclusion, on typical cultivated grassland in Southern China, the effective grazing time for goats was 6 hours and the optimal time was 4 hours.