On plant nutrition in ex situ conservation strategies for rare and endangered plants
珍稀濒危植物迁地保护策略中植物营养问题的探讨

Both the conditions of plant nutrient deficiency and excess can cause serious plant growth disor-ders, or even death. The main issue in plant nutrition research has always been to provide sufficient nutri-tional supplies through methods which improve soil fertility and provide essential mineral elements. Al-though research on plant nutrition has extended from traditional agroecosystems into natural ecosystems, it has not really extended into the field of ex situ conservation for rare and endangered plants. Extensive ex situ conservation is under way in all of the Chinese botanical gardens. In the process, attention is paid to most of the plant species introduction requirements, but usually plant growth and reproduction is negatively affected after ex situ conservation. Past studies on plant species maintenance ex situ seldom include components re-lated to available nutrient conditions required to sustain plant growth and reproduction. This paper therefore proposes three conservation strategies for ex situ conservation: (1) determining the priority list of plant spe-cies for nutrition research; (2) studying nutrient contents in natural soils, and (3) dynamic monitoring and di-agnosis of the nutritional status of species maintained ex situ. These strategies provide valuable guidance for plant nutrition and conservation study, including theoretical explorations and practical problem solving.