EFFECT OF LIQUORICE EXTRACT ON GROWTH AND YIELD IN ONION PLANTS C.V. TEXAS GRANO

Abstract

This study was conducted at the field of the Department of Horticulture – College of Agriculture – University of Baghdad – Abu Ghraib during the growing season (2005 – 2006) to study the effect liquorice extract spraying and applied this extract to soil on onion plant Texas Grano cultivar, The experiment include 9 treatments which were the interactions between three concentrations of liquorice extract spraying,[ no spraying (S 0 ) ,2.5 gm \ L (S1 ) and 5 gm \L (S 2 )] and three levels of liquorice extract application without adding (G0 ) , 5 gm \ m2 (G1 ) and 10 gm \ m2 (G2 )] ,Each treatment replicated three times in Factorial Experimental arrangement with RCBD . The experimental Results showed that interaction liquorice extract spraying and In addition to soil (S2 G2 ) significantly gave the highest plant height of 63.08 cm , dry weight of Total vegetative of 5.91gm and the highest average bulb weight of 187.6 gm and the highest yield of 72.58 ton / ha. While the lowest values of these parameters were found in the control treatment (S0 G0 ). The neck diameter of the bulb did not affected by liquorice extract spraying and addition to soil treatments