EFFECT OF HYBRIDS AND SYPHILIS INDUCTION FACTORS ON GROWTH AND YIELD OF BROCCOLI

Abstract

A field experiment was carried out in one of the vegetable fields of Horticulture and Garden Engineering department ,college of Agriculture ,University of Al –Anbar (The second location ,Abu-Ghraib) ) during Egypt. J. of Appl. Sci., 32 (8) 2017 208 winter season of 2016/2017 in order to study the effect of flowering induction treatments in growth and yield of three hybrids of broccoli, . A factorial trial with two factors was implemented within Randomized complete block design (RCBD) with Three Replicates .The first factor was three hybrids( Jenny, Monaco and Zone ) The second factor was eight treatments which included combinations between exposure to 5°c period and Spraying with Liquorice Extract out concentrations 2.5 g. L1- Three times ,The treatments were as follows : 1-Control without vernalization andwithout spraying ofLiquorice Extract. 2-without vernalization + Spraying of Liquorice Extract . 3-vernalization for 5 days and without Spraying of Liquorice Extract . 4-vernalization for 5 days + Spraying of Liquorice Extract . 5- vernalization for 10 days and without Spraying of Liquorice Extract . 6-vernalization for 10 days + Spraying of Liquorice Extract . 7-vernalization for 15 days and without Spraying of Liquorice Extract . 8-vernalization for 15 days + Spraying of Liquorice Extract . The important results were as follows : 1- The hybrid Jenny was significantly better Than the other two hybrids in plant height ,stem diameter ,leaves number ,leaf area , leaf chlorophyll content and flower disk weight . It was also the best for flower disks yield which was 42.74 Ton . ha1- . 2-The treatment without vernalization +Spraying of Liquorice Extract was Significantly speriorized in plant height , stem diameter ,leaves numbers , leaf area ,leaf chlorophyll content ,leaf and flower disks contents of N, P and K and flower disk weight comparing with other treatments This treatment was the best in total flower disks yield with lateral disks with yield of 47.13 Ton.ha1- and 54.04 Ton .ha1- , respectively . 3- vernalization for 15 days withSpraying of Liquorice Extract treatment was superiori zed in early initiation of flower disks with least days required for completing flower disks harvesting . 4-vernalization treatment at all periods of exposures (5,10 and 15 days ) lowered plant height , stem diameter ,leaves numbers ,leaf area ,total leaf chlorophyll content ,flower disk diameter and weight ,total flower disks yield and protein percentage .