Influence of Cycocel on Growth and Development of Soybean (Glycine max L.)
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Date
2018-07
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University of Agricultural Sciences, Dharwad
Abstract
A field experiment was conducted to study the effect of cycocel on growth, development and yield of soybean variety DSb–21 during kharif, 2017 at Main Agricultural Research Station, University of Agricultural Sciences, Dharwad. The experiment was laid out in randomized block design with three replication and three concentrations of cycocel viz., 125, 250 and 500 ppm sprayed at 30, 45 and 60 days after sowing.
Foliar application of 250 and 500 ppm of cycocel at 45 and 60 DAS decreased the plant height (9 to 10 per cent) whereas, the number of branches increased significantly. Application of cycocel significantly increased the leaf area, total dry matter and growth indices. Physiological traits like, relative chlorophyll content, photosynthetic rate, stomatal conductance and seed quality parameters i.e., seed protein and oil content increased. Yield and yield attributing characters viz., number of flowers per plant, number of pods per plant, flowers to pod ratio, seed weight per plant, seed yield per hectare, harvest index and 100 seed weight were significantly increased due to application of cycocel at 250 and 500 ppm at 45 and 60 DAS. Whereas, higher seed yield per hectare (36.71 q ha-1) was recorded in 500 ppm of cycocel sprayed at 45 DAS. Seed germination percentage and seedling vigour index increased due to foliar application of cycocel after two months of harvest over control.
The soybean genotype DSb-21 responded very well with 34 per cent increase in yield by increasing reproductive efficiency by the increased dry matter production, translocation of assimilates as well as increasing the sink efficiency by foliar application of 500 ppm of CCC at 45 DAS. It is concluded that foliar application of cycocel @ 250 ppm either at 45 or 60 DAS is economical in soybean which recorded B: C of 3.53 and 3.43 respectively.