Influence of Some Nitrogen Fertilization and Dry Yeast Extract Levels on Growth and Pod Yield of Snap Bean (Phaseolus vulgaris L.)

This investigation was carried out during two successive summer seasons of 2015 and 2016 in a private farm at Al-Harsha, Zawia region, Libya, to examine the effect of N-Fertilization (in the form of ammonium sulphate, 20.5% N"; 0, 50 and 100kg/ha")and foliar application with dry yeast extracts (0.2 and 4 g/l) , and its combined effect on growth, yield and its attributes, as well as, quality traits of snap bean (bronco cultivar). The experiment was laid out as spilt plot arrangement in randomized complete blocks design (RCBD) with three replications. The results showed that applying N-Fertilizer and foliar application with dry yeast extract gave significant differences in all studied traits compared to the control (untreated) in favor of 100kg/ha, N and 4g/l dry yeast extract in both seasons. Concerning the combined effect between N-Fertilization and dry yeast extract, there were significant effects in most of studied traits in both seasons. The combination of 100kg N/ha, and 4 g/l dry yeast extract recorded the highest mean values of vegetative growth characters yield components, total yield and pod quality in the both seasons. Conclusively: it could be concluded that the treatment of NFertilization in the form of ammonium sulphate (20.5% N) at 100 kg N/ha and foliar application with dry yeast extract at the level of 4 g/l, as well as, the combined effect between 100 kg N/ha and 4 g/l dry yeast extract enhancing the studied characters of snap bean.