Effect of spraying with seaweed jump start and phosphorous fertilizing on growth and yield of two spinach varieties

Abstract

The research was conducted in bakrajo district, sulaimaniyah governorate in 2015-2016 season for studying the effects of spraying with seaweed jump start in three levels 0, 0.3 and 0.6 ml L-1, and three levels 0, 20 and 40 kg P2O5 donum-1, of phosphorous fertilizing on growth and yield of two spinach varieties (local and Frenchvariety). Factorial experiment conducted with randomized completely block design with three factors. Seeds sown on 26/10/2015 in blocks 6m2 area in lines with 3 gm m-1 and the fertilizer super phosphate was applied once and the seaweed was sprayed three times the first when the seedlings get to a four-leaves stage and after that each three weeks.Results showed that the two varieties differ in all characteristics however their response to the extracts and phosphorous are the same, as there were a significant effect of the extract and phosphorous fertilizer and the interaction between them in improving of yield characters and seeds, the treatment P2S2 preeminence significantly in total yield, single leaf area, number of clusters and seed weight.plant-1. percentage gave the best results about 4.35 Ton donum-1, 90.49 Cm2, 43.06 and 6.06 gm plant-1 respectively according to control P0S0 which gave 3.14 Ton donum-1, 71.08 Cm2, 34.19 and 4.59 gm plant-1 for the characteristics respectively.