论文部分内容阅读
以青藏高原高寒地区—金强河地区 (海拔高度约 30 0 0 m)旱作条件下建植的多年生禾草混播草地为材料 ,进行草地植被状况和土壤肥力变化的研究。经过 3年 (1998～ 2 0 0 0年 )的试验分析和调查总结 ,可以得出如下结论 :多年生禾草混播草地可以有效增加地表的植被覆盖率 ,减少水土流失 ,恢复土壤肥力 ;多年生禾草混播草地的产出 /投入比、劳动生产率和单位草地面积的净收益都明显高于作物田 (燕麦地 )、放牧草地和封育草地 ,经济效益明显 ;多年生禾草混播草地的合理建植和推广是解决青藏高原高寒草地高效生产和持续发展矛盾、推动牧业经济发展、提高农牧民生活水平的一条重要途径。
The perennial grass mixed sown grassland was planted in the alpine region of Qinghai - Tibet Plateau - Jinqianghe region (elevation of about 30 000 m), and the changes of grassland vegetation status and soil fertility were studied. After three years (1998 ~ 2000) of the experimental analysis and survey concluded that the following conclusions can be drawn: perennial grass mixed grassland can effectively increase the surface vegetation coverage, reduce soil erosion and restore soil fertility; perennial grass The output / input ratio, labor productivity and grassland net profit of mixed grassland were significantly higher than those of cropland (oat field), grazing grassland and enclosed grassland, and the economic benefits were obvious. The rational planting of perennial grass mixed grassland and Promotion is an important way to solve the problem of efficient production and sustainable development of alpine grasslands in the Qinghai-Tibet Plateau, promote the economic development of animal husbandry and improve the living standards of farmers and herdsmen.