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      • Open Access Article

        1 - Process Optimization in Vacuum Frying of Green Bean Slices Using Response Surface Methodology
        M. Nikkhah Eshghi B. Ghiassi Tarzi A. R. Basiri
        Introduction: Vacuum frying is a new technology that might be useful for producing newkind of snacks such as fruit and vegetable chips. The reason for this technology is to reducethe presence of oxygen and lower the processing temperature. The aim of this work is todete More
        Introduction: Vacuum frying is a new technology that might be useful for producing newkind of snacks such as fruit and vegetable chips. The reason for this technology is to reducethe presence of oxygen and lower the processing temperature. The aim of this work is todetermine the effect of process parameters namely time, pressure, temperature on the specificcharacteristics of green bean in order to achieve the optimal processing condition.Materials and Methods: In this research, samples were processed in predeterminedtemperatures, pressures and times by using statistical response procedures. The effects offrying time and temperature and pressure on reduction of moisture, oil absorption, shrinkage,texture, and color were studied.Results: The optimum conditions of 119.13oC for the temperature, 285 mbar for the pressureand 14.63 min for the time were obtained. The results showed that the time of the exposure tofrying has a direct and significant relation to vacuum pressure and the samples moisture levelis related to frying time and the moisture of the sample is significantly reduced (p<0.05) byincreasing the frying time. Oil absorption level has a significant relation with temperature andtime (p<0.01).Conclusion :The results indicated that vacuum frying can improve the nutritional quality ofthe food with reduced cost and avoid the loss and wastage of the product. Manuscript profile
      • Open Access Article

        2 - Variation Trend of Leaf Area Index, Yield and Yield Components of Green Beans (Phaseolous vulgaris L.) by Using Zinc Sulfate and Nitrogen
        Sh. Lack M. Kermanshahi H. Noryani
        Proper nutrition of plant is one of the most important factors to improve both quality and quantiy of crop yields. Accordingly, the effect of different levels of zinc and nitrogen on leaf area index, yield and yield components of green beans investigated in the summer o More
        Proper nutrition of plant is one of the most important factors to improve both quality and quantiy of crop yields. Accordingly, the effect of different levels of zinc and nitrogen on leaf area index, yield and yield components of green beans investigated in the summer of 2012. The experiment used was a split plot in randomized complete block design with three replications in the Dezful. In this study, the main plots consisted of four nitrogen rates of urea (0, 30, 60 and 90 kgha-1), and sub plots of four levels of zinc sulfate (0, 10, 20 and 30 kg.ha-1). The results showed that application of 90 N kg.ha-1 increased leaf area index, plant dry matter, grain yield, biological yield, harvest index and protein content. Use of zinc sulfate at the rate of 20 kg.ha-1 was superior in grain yield and yield components. The highest leaf area index, grain and biological yields harvest index and protein content were achieved by application of 90 kg nitrogen and 20 kg of zinc sulfate per hectare. It seems that the use of zinc with appropriate rates, through its involvement in physiological processes and nitrogen metabolism in plants as an essential element, accelerates green beans growth processes and increases green bean yield. Manuscript profile
      • Open Access Article

        3 - Effect of micronutrient application at different growth stages on growth and yield of common bean (cv. Sanrey)
        Leyla Gheyrati Arani Mohammadreza Sheykhi Tayebeh Sharifi
        Effect of soil and foliar application of Fe, Zn and both Fe and Zn fertilizers on growth and yield of green bean was evaluated as factorial based on a rondomized complete block design. Factors were fertilizer type (Fe, Zn, and both Fe and Zn fertilizers) and fertilizer More
        Effect of soil and foliar application of Fe, Zn and both Fe and Zn fertilizers on growth and yield of green bean was evaluated as factorial based on a rondomized complete block design. Factors were fertilizer type (Fe, Zn, and both Fe and Zn fertilizers) and fertilizer type and application time (control, soil application of fertilizers, foliar application at vegetative stage, foliar application at early flowering stage, foliar application at two vegetative and flowering stages, foliar application after harvest, foliar application at three vegetative, early flowering and after harvest stages). Based on the results, soil application of fertilizers, foliar application at two vegetative and flowering stages and foliar application at three vegetative, early flowering and after harvest stages increased plant height, leaf number, leaf dry weight, stem dry weight, shoot dry weight and  yield, significantly. Application of both Fe and Zn fertilizers was more effective than solely application of each fertilizer in leaf number, leaf dry weight, stem dry weight, shoot dry weight and yield. Maximum yield (2.29 kg/m2) was obtained by application of both fertilizers and minimum rate (1.82 kg/m2) was observed when Fe fertilizer was applied solely. Pod yield was also 65, 59 and 65% higer than the control in soil application of fertilizers, foliar application at two vegetative and flowering stages and foliar application at three vegetative, early flowering and after harvest stages treatments, respectively. Combined application of Fe and Zn and solely application of Zn resulted in a higher Zn content in plant in comparison to the solely application of Fe. Besides, the lowest Zn content in plant was obtained in foliar fertilizer application at vegetative stage. Also, combined application of Fe and Zn and solely application of Fe resulted in a higher Fe content in plant in comparison to the solely application of Zn. The minimum impact on increasing Fe concent in plant was observed in foliar application of fertilizers at early flowering stage. Manuscript profile