The species and the quantities of facultative parasitic fungi on old needles are more than those on young needles, and increases with crown canopies from high to low.

• 兼性寄生性真菌在老龄针叶上的种类和数量均多于小龄针叶，并为老龄针叶的习居菌，而且随冠层的降低还有增加。