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对有林草场和无林草场，以绵牛为试验对象，进行基本动态观测、采食率调查、日食量测定、进食状况、表现行为和抗病力、植被动态变化的研究、生理活动的测定、牧草恢复速度的试验。研究表明；草场防护林除了具有显著的生态、经济、社会效益外，可提高无林草场的载畜量０．６７５只／ｈｍ２；增加草场的综合生产能力；具有增强绵羊抗病能力的功能。通过测定知：有林草场采食率高于无林草场１０．５２％；绵羊采食后牧草的恢复时间比无林草场短２～４ｄ，既单位时间内能生产更多的牧草；由于有林草场的庇护、蔽荫作用，与无林草场试验羊在生理活动上差异显著，能有效地在炎热夏季维持绵羊的正常新陈代谢，减少能量的消耗。有利于绵羊的生长发育和增骠
The dynamic observation, the survey of feed intake, the measurement of solar eclipse amount, the state of eating, the performance behavior and disease resistance, the dynamic change of vegetation and the determination of physiological activities were conducted on the forested and non-forested grassland. , Forage recovery speed test. The results showed that grassland shelterbelts could increase the carrying capacity of no grasslands by 0.675 / hm2 in addition to significant ecological, economic and social benefits; increase comprehensive productivity of grasslands; and enhance sheep disease resistance. The results showed that: The feed efficiency of forest grazing grassland was 10.52% higher than that of no-forest grassland; the recovering time of grazing sheep was 2 ~ 4 days shorter than that of no-forest grassland, which could produce more pasture per unit time; The shelter and shade effect of grassland in forest and grassland were significantly different from that in the non-forest grassland test sheep, which could effectively maintain the normal metabolism of sheep during the hot summer and reduce the energy consumption. Is conducive to the growth and development of sheep and increase 骠