补播技术在库布齐沙地草场中的应用

THE APPLICATION OF INTERSEED TECHNIQUE ON HOBQ SANDY PASTURE

通过对库布齐沙地草场补播改良技术的研究，确定出适宜的补播牧草种类及播前种子处理技术，适时的补播时间，正确的补播地形和适宜的补播机器。改良后的沙地草场生态环境明显改善，土壤养分提高，植被盖度和产草量随着补播年限的增加而增加，补播第３年，植被盖度达到７８％，干草产量５２５０ｋｇ／ｈｍ２，分别比补播前提高３倍和７倍，流沙移动得到控制。生态环境的改善，带来了可喜的经济效益，草场载畜量由０．５～０．７５个羊单位／ｈｍ２提高到２个羊单位／ｈｍ２，草地年收入纯增２４６元，比补播前提高２倍。

The interseed techniques including suitable grass species selection, seed dealing, right interseed time, correct interseed terrain and appropriate interseed machine were studied and applied in the practice.The results of all effort were showed by the improvement of ecological environment and the increasing of soil nutrition, vegetation cover and pastural biomass. In the third year after interseeding, the vegetation cover and the yield of dry grass were 4 and 8 times as mach as those before interseeding. Moving sand was controlled. Benefit by the ecological environmental improvement, the carrying capacity for live stock was hightened to 2 goat unit/hm 2 from 1.5￣2 goat unit/hm 2 and the net annual income from grassland was 3 times as much as that before interseeding.