EFFECTS OF SOIL APPLICATION OF DIFFERENT FERTILIZERS AND FOLIAR SPRAY WITH YEAST EXTRACT ON GROWTH AND YIELD OF FABA BEAN PLANTS

Increasing the need for food production leadto increasing the use of mineral fertilizationthat affects the soil and the ecosystem. A field trail was conducted to investigate the response of faba bean plants to the foliar application ofyeast extract, inoculation with bio-fertilizer and application of humic acid. The foliar application of yeast extract (10 g/l) significantly increased the growth and yield of faba bean plants. The uptake of N, P and K by faba bean plants sprayed by yeast extract were 32, 56 and 27%, respectively, higher than those of the non-treated ones. Application of humic acid and inoculation with phosphorine and rhizobactrine decreased soil pH but they increased soil organic carbon and available N, P and K. The yeast extract, humic acid and bio-fertilizer inoculation increased the economic return of faba bean. It can be concluded that using combination of humic acid and bio-fertilizer inoculation with yeast extract spraying increased the quality and economic return of faba bean as well as saved about 75 and 50% of N and P requirements, respectively.