Effects of Potassium Fulvate on the Growth and Flowering Characteristics of Viola cornuta L.
In order to screen the most suitable application amount of potassium fulvate for the growth of Viola cornuta L.,the cultivated variety of"Juice ice cream"with bluish violet was used as the experimental material.Basis on conventional fertilization,five application amounts of potassium fulvate(0,20,40,60,and 80 mg/pot)were used to study the effects of potassium fulvate on morphological indicators,photosynthetic pigments,and flowering characteristics of potted Viola cornuta L..The results showed that as the application amount of potassium fulvate application increased from 0 to 40 mg/pot,the height,tiller number,leaf area and fresh weight of each plant of Viola cornuta L.showed a significant increase trend,with increases of 33.84％,40.91％,37.60％and 25.06％,respectively.At the same time,the chlorophyll a and carotenoid content of Viola cornuta L.significantly increased by 29.27％and 36.50％,respectively.The single flower area and number of flowers per plant significantly increased by 53.54％and 47.95％,respectively.When the application amount of potassium fulvate increased from 0 to 60 mg/pot,the fresh weight of the flowers per plant significantly increased by 90.14％.The application amount of potassium fulvate increased from 40 to 80 mg/pot,and the morphological indicators and photosynthetic pigments of Viola cornuta L.showed a relatively small increase.In summary,potassium fulvate could promote the growth and flowering of Viola cornuta L.to a certain extent.The preferred application amount of potassium fulvate was 40 mg/pot,from the perspective of promoting efficiency with less fertilizer.
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