Impact of Bio and Mineral Fertilizers on Potato (Solanum tuberosum L.) Productivity and Quality

Abstract

A field experiment was implemented in 2017/2018 winter season in privet farm at Nabarouh city, El-Dakahlia Governorate under open field conditions (31°06′52.3″ N 31°17′43.8″E) to study ֹthe effect of biological and mineral fertilizers on the productivity and quality of potato (Solanum tuberosum L, cv. Spunta). The experimental design was split-plot design with three replicates. The main treatments were without bio-fertilizer(B 0 ) and with bio-fertilizer(B 1 ) while the sub-main treatment was mineral fertilization at rates of (control = without KP-mineral fertilizer(KP 0 ), 33%(KP 1 ), 66%(KP 2 ) and 100%(KP 3 ) of potassium and phosphorus fertilizer recommendation dose for potato. The obtained results were: Biological fertilization (B 1 ) gave the highest mean yield of fresh and dry weight, 15.72 and 2.86 ton.fed -1 , respectively compared with B 0 . Whereas 100% PK-mineral fertilization (KP 3 ) gave the highest mean yield of fresh and dry weight which was 16.02 and 3.13 ton.fed -1 , respectively. In addition, the interaction treatment B 1 KP 2 gave the highest mean yield of fresh and dry weight (17.15 and 3.43 ton.fed -1 ). Also, KP 3 led to the highest percentage of N, P and K (%), they were 0.79, 0.276 and 1.89%, respectively. The interaction treatment of bio with 66% of mineral fertilizers (B 1 KP 2 ) gave the highest significant increase of N, P and K% in potato tubers hence it may saving 34% of mineral fertilization. With regard to the quality parameters for potato, it was found that bio-fertilization (B 1 ) was the best treatment for the quality characteristics as well as 66% of the recommended fertilizers dose and there were insignificant differences between B 1 KP 2 and B 1 KP 3 .