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甘肃省夏玛林区的森林在人为破坏和不良自然环境条件胁迫下所发生的林木病害,常造成林业生产的重大经济损失,使幼林的生长受到严重威胁导致森林生态系统健康状况不
Forest diseases occurring in the Xiamalin district of Gansu Province under man-made damage and adverse natural environmental conditions often result in significant economic losses in forestry production, which threaten the growth of young forests and lead to the deterioration of forest ecosystem health