【摘要】 通过该研究,揭示了蒿属荒漠春秋场封育与放牧演替的规律性,找出了改良和合理利用蒿属荒漠草地、提高其生产力的两个有效措施和封育+中牧利用(50%)这一优化利用模式。结果还表明,封育4年草地产量比封育前增长87.8%,多年生牧草占总产比重增加5.6倍;从五个不同处理相比,既要合理利用牧草,又要使草群质量得以改善而言,仍以中牧最优,其产草量比封育前增长79.6%,与封育4年相比,也只低4.3%,草群中多年生牧草占总产比重比封育前提高3.1倍。封育与中牧,无论在增加产量和改善草群组成结构方面,都取得显著的效果。更多还原

【Abstract】 The fencing and grazing succession laws were explored by the study in this paper on the spring—au- tumn pasture of sagebrush desert.Two effective measures and optimized utilizing model of fencing+ moderately grazing(50%) were found of improving and conservative utilizing sagebrush desert grassland as well as raising its productivity.The results showed also that forage yields and perennial grass yield ratio af- ter fencing for 4 years increased by 87.8% and 5.6 times more than those before fencing,respectively; By comparison to five different measures,the moderately grazing was the best measure,either conservative utilizing grassland or improving grassland quality;In the moderately grazing measure,forage yield in- creased by 79.6% over that before fencing,decreased to 4.3% less than that after fencing for 4 years, and perennial grass yield ratio raised 3.1 times more than before fencing.The fencing and moderately graz- ing gained remarkably the benefits of increasing forage yield and improving grassland composition and struc- ture.更多还原