Dicentra

Abstract: The invention relates to the field of fertilizers, in particular to a fertilizer for cultivating dicentra spectabilis, and provides a method for preparing the fertilizer for the dicentra spectabilis. After the fertilizer serving as a basic fertilizer is applied at one time, the basic nutritional requirement of the dicentra spectabilis in the whole growth period can be met; the fertilizer contains basic elements such as N, P, K and the like, various secondary and trace elements and a plant growth regulator, so that the requirement of the dicentra spectabilis on various elements in different growth periods can be met, and the growth and development of roots and leaves of the dicentra spectabilis are promoted; a bactericide is added in a formula, so that the fertilizer has the effects of killing bacteria and pests and preventing pest and disease damage, and has a good effect of preventing and treating possible leaf spot disease and scale insect disease of the dicentra spectabilis; and attapulgite is taken as an additive of an agricultural fertilizer and has peculiar physical properties, so that the metabolism of plants can be promoted, and the conversion rate of nutritional substances can be improved.

Abstract: The pollination of a large mixed population of Dicentra canadensis and D. cucullaria was studied in a beech-maple forest in southwestern Ohio. Analyses of pollinator frequencies and species, pollinator behavior, sugar components and concentrations in nectar, corbicular pollen loads carried by pollinators, spectral reflectance from corollas including ultraviolet reflectance, fragrance, blooming phenology, insect-related fertility, and hybridization potentials suggested that these sympatric Dicentra species are reproductively isolated by internal mechanisms but not by external barriers to hybridization. Both species were exclusively and obligately dependent upon queen bumblebees for their pollination unlike other members of the spring ephemeral flora to which they belong. The occurrence of one or both species in one area is considered primarily the result of their adaptive preference for different edaphic and possibly climatic situations and not the consequence of competitive exclusion