Response of three potato varieties to mineral fertilization (soil and foliar application)

Abstract

A field experiment was conducted in 2016 and 2017 in Al-Hamzawi region, which is located north of Babylon Governorate and within the latitude (44) and longitude line (32) , to study the response of three potato varieties (Rivera, Elmundo and Burren) with fertilization treatments : control, 100% of fertilizer recommendation (200 kg DAP) without foliar fertilizer (12-12-36 of NPK with microelements ) or with foliar fertilizer every 20 days, 75% or 50% of potato fertilizer recommendation with foliar fertilizer every 10 or 20 days , on yield of potatoes. The experiment was carried out according to split plot arrangement at randomized complete block design with three replications. The results were summarized as follows: Rivera variety was superior in average tuber weight (104 and 105 gm ) significantly compared to other varieties, while elmundo variety was superior in marketable total yield , which were 18.87 and 25.93 t.ha-1 in both seasons respectively , and in starch percentage significantly compared to other varieties. Burren variety was superior significantly in marketable yield compared to rivera variety in both seasons. All fertilizer treatments were superior significantly in marketable yield compared to control treatment. The interaction between the treatments caused a significant effect and elmundo variety with all soil and foliar fertilizer were superior compared to all other interactions in both seasons except the interaction of burren variety with with 100% or 75% + foliar fertilizer in autumn season .