Abstract
Soybean, Glycine max is an annual crop belonging to the family Fabaceae, which has 40% protein, 20% oil and 30% carbohydrate and plays a very significant role in world agriculture. Some farmers hasten the maturity and desiccation of soybean crop by applying herbicides without giving attention to the effects on seed. This study was conducted to investigate the effect of herbicides as desiccant on protein and sugar content of soybean seed. For this, three cultivars of soybean seed SB 19, SB 25 and SB 3 were planted and applied with three types of herbicides Glyphosate, Paraquat, 2,4-D. The herbicides were sprayed at three stages of soybean seed development R6, R7, and R8. The herbicides effect was highly significant (P ≤ 0.001) on the protein content in two locations and were highly significantly different (P ≤ 0.001) on the sugar content in all locations. All the herbicides showed reduction in sugar content in all locations and were also lower in protein content as compared to the control. It is concluded that using herbicides as desiccant have negative effect on the protein and sugar content of soybean seed. Keywords: Herbicide, Stages of application, Protein, Sugar. DOI : 10.7176/JBAH/9-18-07 Publication date :September 30 th 2019
Highlights
Soybean, Glycine max is an annual herbaceous leguminous crop belonging to the family Fabaceae, which has erect bushy leafy plant structure
3.2 Sugar content as affected by herbicides There was no significant difference among the cultivars on sugar content at UoE but differed significantly (P ≤ 0.05) at Mabanga and Busia
This study showed that, protein and sugar were influenced by environment, herbicides and stages of application
Summary
Glycine max is an annual herbaceous leguminous crop belonging to the family Fabaceae, which has erect bushy leafy plant structure. It is a strictly self-pollinating legume with 40% protein, 20% oil and 30% carbohydrate and plays a very significant role in world agriculture (Tefera, 2010). A smaller percentage is processed to make soy flour and protein for human consumption. Maturity, and harvest management are critical considerations for maintaining high seed quality (Bewley et al, 2013). Harvesting of seeds at the optimum stage of maturity is important as harvesting either at early or late stage results in poor quality seeds
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