Effect of Bio and Inoroganic Fertilization on Growth and Yield of Some Sugar Cane Varieties

Field experiment was carried out at Mallawi Agriculture Research Station, Minia Governorate, (latitude of 28° N, latitude of 30° E and latitude of 49 m above sea level ) Egypt, during the two successive seasons (2016/2017and 2017/2018). To study the effect of addition of bio fertilizer (Azotobacter chroccocum) and different levels of inorganic nitrogen fertilizer (Three rates of N fertilizer 100%,75% and 50% of recommended dose RD) on stalk diameter, stalk length, stalk weight, total soluble solids purity, sucrose, sugar recovery sugar yield and cane yield of three sugar cane varieties (G.99-103, G.472003 and G.T.54-9) strip plot design with three reps. The results indicated that sugar cane varieties and bio fertilizer (Azotobacter chroccocum) with different levels of inorganic nitrogen fertilizer exhibit significant effects on all studied traits in both seasons. The variety G.99-103 recorded the highest values of stalk diameter, stalk length, stalk weight and N%, N uptake plant, N uptake fed., millable cane ( ton fed ) and sugar yield (ton fed) in both seasons, while G.T.54-9 variety recorded the highest values of total soluble solids, purity%, sucrose and sugar recovery %. The addition 75% N (160 kg N fed) + Azotobacter chroccocum gave the highest values in all studied characters except purity % in both seasons. The interactions between sugar cane varieties and bio fertilizer (Azotobacter chroccocum) with different levels of inorganic nitrogen fertilizer significantly affected on the studied traits in both seasons. Under the conditions of present work, the results suggest that planting G.99-103 variety with 160 kg N fed + Azotobacter chroccocum is highly recommended to obtain the highest cane and sugar yields.