【摘要】 本文依据贺兰山东麓草场防护林体系的实际观测资料,论述了荒漠草原地带防护林体系的动力、热力与水文等生态效益,并估算了经济效益。更多还原

【Abstract】 Based on the exrerimental data taken from the grassland shelterbelt sy-stem at the eastern foot of the Helan Mountain, the paper expounds the dy-namic effect, the thermodynamic effect and the hydrologic effect of the sh-elterbelt system in the desert steppe zone, and estimates the economic ben-efits of the system.更多还原