Bag-cultivated lingzhi (Ganoderma lucidum) delivers good returns, and scientific growing and management are the key

Bag cultivation is currently one of the most widely used methods of artificial cultivation of lingzhi (Ganoderma lucidum): sawdust, cottonseed hulls and other substrate materials are placed into plastic bags, sterilized and inoculated, and then the mushrooms are grown indoors or in a greenhouse. This method takes up little space, makes temperature and humidity easy to control, and allows centralized management; it suits small-scale growing by farmers and can also be combined with mushroom houses, greenhouses and other facilities for scaled-up production.

To get good returns from bag-cultivated lingzhi, the first step is to choose a good variety and ensure the quality of the spawn bags. The growing substrate commonly uses hardwood sawdust combined with bran, gypsum and other supplements, with moderate moisture content; the bags should be filled to a consistent firmness, sterilization must be thorough, and inoculation must strictly follow aseptic procedures so that spawn running is uniform and the contamination rate stays low. During the spawn-running stage, the bags should be kept in a warm, dark, ventilated environment; once the mycelium has fully colonized the bags, they are moved on to fruiting management.

The fruiting stage is the key phase that determines the yield and quality of lingzhi. During this period, maintain a suitable temperature, raise air humidity, and at the same time strengthen ventilation and provide appropriate scattered light to encourage thick stipes and well-spread caps. If ventilation is poor, the stipes tend to become thin, elongated and misshapen; if humidity is too low, the edges of the caps tend to turn yellow, and both problems reduce market value, so daily management requires frequent observation and fine adjustment.

Returns can be improved in several ways. Arrange the cropping schedule sensibly so that the fruiting stage avoids unfavorable seasons; place the bags in three-dimensional stacks to make full use of space; in the later fruiting stage, bags can also be used to collect spore powder, adding another source of income; and the harvest timing must also be grasped well: harvest promptly once the white growth ring at the edge of the cap disappears, so that the lingzhi is plump and thick and looks good for sale. In addition, the spent substrate after harvest can be returned to the fields to fertilize the soil or used a second time, further reducing growing costs.