论文部分内容阅读
目前,我国很多草原地区的载畜量均出现不同程度的超载现象,因而造成草场退化,产草量下降,特别是冬春饲草缺乏,从而导致牲畜瘦乏、死亡。据内蒙古自治区三十年来的不完全统计,牲畜死亡数量超过了出售数量,严重阻碍着畜牲业的发展。畜牧业生产实践证明,围建草库论、建立人工草场和饲料基地是解决牲畜冬春饲草缺乏的有效途径。研究牧草不同生长年限产草量和不同发育阶段营养成分的变化规律,不仅可以确定牧草适宜的刈割时期和经济有效的利用年限,而且也具有重要的生产意义和理论价值。为此,我们于1977年—1980年对20种优良牧草的产量和营养动态进行了系统的研究。
At present, the carrying capacity of many grassland areas in our country is subject to various degrees of overloading, resulting in the degradation of grasslands and the reduction of grass yield, especially the lack of forage grass in winter and spring, resulting in the shortage and death of livestock. According to the incomplete statistics of Inner Mongolia Autonomous Region for three decades, the death toll of livestock exceeded the number of livestock sold, seriously hampering the development of animal husbandry. Animal husbandry practice has proved that the establishment of grass-covered theory, the establishment of artificial grassland and feed base is to solve the shortage of livestock winter and spring forage an effective way. Studying the law of grass forage growth in different growth stages and nutrient composition at different developmental stages can not only determine the appropriate mowing time and cost-effective useful life of pasture, but also have important production significance and theoretical value. To this end, we conducted a systematic study of the yield and nutrient dynamics of 20 excellent forage species from 1977 to 1980.