CAJ | 학술논문

试验选用5只瘤胃瘘管羊，用尼龙袋法对采自甘肃玛曲高寒草甸、沼泽化草甸、甘肃张掖平山湖荒漠草原及新疆温性草原天然混合牧草的干物质消化率（DMD）和营养成分进行测定。结果表明，高海拔地区的高寒草甸和沼泽化草甸牧草干物质消化率显著高于低海拔地区荒漠草原，且随着时间的推移，高寒草甸和沼泽化草甸牧草干物质消化率先升高后降低，且在6月体内消化率达到最高，而平山湖荒漠草原表现相反趋势。新疆温性荒漠草原则随着季节的变化，从花期—果期—枯草期牧草干物质消化率逐渐降低。玛曲高寒草甸牧草干物质消化率与牧草粗蛋白含量（CP）呈极显著正相关（P ＜0．01），与牧草中酸性洗涤纤维（ADF），中性洗涤纤维（NDF）呈极显著负相关（P ＜0．01）；牧草生育期与 CP 含量和 DMD 呈极显著负相关，与 DM，ADF，NDF 均呈极显著正相关（P ＜0．01），说明在高寒牧区，6，7和8月牧草营养价值较高，可满足放牧家畜维持和生产能量需要。
시험선용5지류위루관양，용니룡대법대채자감숙마곡고한초전、소택화초전、감숙장액평산호황막초원급신강온성초원천연혼합목초적간물질소화솔（DMD）화영양성분진행측정。결과표명，고해발지구적고한초전화소택화초전목초간물질소화솔현저고우저해발지구황막초원，차수착시간적추이，고한초전화소택화초전목초간물질소화솔선승고후강저，차재6월체내소화솔체도최고，이평산호황막초원표현상반추세。신강온성황막초원칙수착계절적변화，종화기—과기—고초기목초간물질소화솔축점강저。마곡고한초전목초간물질소화솔여목초조단백함량（CP）정겁현저정상관（P ＜0．01），여목초중산성세조섬유（ADF），중성세조섬유（NDF）정겁현저부상관（P ＜0．01）；목초생육기여 CP 함량화 DMD 정겁현저부상관，여 DM，ADF，NDF 균정겁현저정상관（P ＜0．01），설명재고한목구，6，7화8월목초영양개치교고，가만족방목가축유지화생산능량수요。
The digestibility of dry matter in forages collected from Maqu alpine meadow,swampy meadow, Pingshan lake desert steppe of Zhangye in Gansu and temperate steppe in Xinjiang was analyzed using the nylon bag method in 5 rumen-fistulated sheep.The digestibility of forage dry matter in alpine meadow and swampy meadow in high altitude areas was significantly higher than that of herbage from desert steppe of low altitude areas.In addition,the digestibility of forage dry matter in alpine meadow and swampy meadow tended to rise in spring to a peak in June and then decline in late season,while the opposite trend was observed in Pingshanlake desert steppe of Zhangye.In contrast,the digestibility of forage dry matter in Xinjiang temperate steppe exhibited a declining trend as herbage progressed through flowering,seed set,and hay stages of growth.As expected,forage dry matter digestibility was significantly positively correlated (P <0.01 )with forage crude protein (CP)content,and significantly negatively correlated (P <0.01)with ADF and NDF in alpine meadow. That is,forage growth stage was negatively correlated with CP content and DMD,but was highly positively correlated with DM,ADF,and NDF (P <0.01 ).The study indicated that the forage from alpine meadow in June,July and August had very high nutritional content,and is ideal to meet the energy needs of maintenance and growth,for grazing livestock.