في انتاج وجودة درنات البطاطا solu potash و unigreen تأثير الرش بالمحلول المغذي (solanum tuberosum l.)‎

الملخص EN

An experiment was conducted during spring and fall seasons of 2005, using potato (cv.

Desiree) in the field of Department of Horticulture, College of Agriculture, University of Baghdad.

A randomized complete block design was used to investigate the effect of foliar fertilizers, Unigreen (containing macro and micronutrients) 2.5 g/l and Solu Potash (containing 50% K2O) 3.0 g/l.

Unigreen was applied at the vegetative, tuber initiation, tubers bulking and enlargement stage; whereas Solu Potash was applied at tubers bulking and enlargement stage.

Solutions of these fertilizers were sprayed individually or mixed with each other at different stages of growth.

The experiment consisted of 13 treatments arranged randomly in 3 replicates.

Yield and yield components were measured as well as tubers' NPK contents.

Potato plants grown in spring and fall treated with Unigreen at any stage with Solu Potash gave higher total yield (0.95 and 0.83 kg/plant, respectively) and marketable yield (0.90 and 0.76 kg/plant, respectively) and had higher number of marketable tubers per plant and total number of tubers per plant in spring season (8.74 and 12.02 tuber/plant, respectively).

Tubers of this treatment had high quality in spring season crop; they had higher dry matter percentage (21.56 %), starch (15.21%) and specific gravity (1.086 %).

The tubers of fall crop were higher in N (1.96%), P (0.38%) and K (2.98%).

Potato crop grown in the fall and treated with Unigreen at the three stages gave the highest number of tubers per plant (9.62).