Effects of Humic Acid Water-soluble Fertilizer on the Growth,Development and Photosynthetic Characteristics of Pansy
The effects of humic acid water-soluble fertilizer on the growth of potted flower pansies were studied,and the fertilizer efficiency at different application periods was compared in this study.Three treatments were set as follows,i.e.,conventional fertilization(T1),conventional fertilization + basal application of humic acid water-soluble fertilizer(T2),and conventional fertilization + top application of humic acid water-soluble fertilizer(T3).The results showed that,compared to T1,T2 and T3 were effective on the growth and development of pansy.In particular,T3 was more effective in promoting the flower,leaf,and plant fresh weight of pansy,while T2 was more effective in plant height.In terms of photosynthetic characteristics,compared to T1,both T2 and T3 treatments could effectively promote the development of leaf number,increase the content of chlorophyll b which promoted photosynthetic pigment,thereby increasing the photosynthetic area and enhancing the photosynthetic effect.There was little difference in the effect of T2 compared to T1 and T3 compared to T1.Compared to T1,T3 increased significantly the stomatal conductance and photosynthetic rate,promoted the growth and development of pansy.In summary,the addition of humic acid water-soluble fertilizer on the basis of conventional fertilization could promote the growth and development of pansy,and the effect of T3 was better.
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