人参地只能种植一次，然后这块地40-50年不能用，因为有diseases。

http://www.omafra.gov.on.ca/english/crops/hort/news/hortmatt/2014/01hrt14a2.htm

“Soil and Diseases

Ginseng is highly prone to a number of devastating diseases, including Phytophthora blight, Cylindrocarpon root rot, Alternaria leaf blight, Botrytis blight and Rhizoctonia root rot. Any one of these diseases can wipe out an entire garden in a matter of weeks if not intensively managed. Several additional diseases can also cause considerable damage. In periods of heavy rainfall, diseases can cause major reductions in yield even with intensive management. It is not uncommon for entire acreages to be wiped out by disease in heavy rainfall years. New growers face a higher risk of disease due to inexperience managing these diseases.“

“ginseng cannot be grown on the same land twice due to replant disease. Replant disease is a poorly understood issue that prevents ginseng cultivation on the same land even 40 or 50 years later because of significant soil-borne diseases in the second crop. This has resulted in a shortage of suitable land for ginseng production and increased land lease prices for ginseng. In addition, many growers have to travel long distances from their home farms to their fields, resulting in higher fuel and labour costs.“

 

所有跟帖： 

• 谢谢！不过可以用翻地，放药，解决的。。。呵呵！ -螺丝螺帽- ♀ (0 bytes) () 12/09/2017 postreply 05:42:29

• 所以，我后来去的专卖店，价格贵好多。 -螺丝螺帽- ♀ (152 bytes) () 12/09/2017 postreply 05:44:26