Effects of biofertilizers and compost application on vegtative growth of plum transplants

This study was conducted in a lath house, Dept. Of Hort. and Landscape, College of Agricultural Engineering Sciences, Univ. Baghdad, AlJadriya during 2018 and 2019 growing seasons to investigate the influence of Biofertilizers and compost on growth of one year’s old trees of “Hollywood” plum cultivar. The first factor is the addition of biofertilizers (B) at four types are without addition (B0) and the addition of Azospirillum brasilemse to soil (B1) , addition of Bacillus megatherium to soil (B2) and the addition of Azospirillum brasilemse + Bacillus megatherium to soil (B3). The second factor is the addition of compost, without adding (C0) and the addition of compost prepared from palm leaves to soil (C1) and the addition of compost prepared from the residues of wheat to soil (C2). Treatments were replicated three times (three transplants in experimental unit) at factorial experiment in a RCBD. The results of the study were statistically analyzed and averages were compared according to the (L.S.D) at 0.05 and thus the number of transplants used was 108 transplants. The experimental results showed; The addition of biofertilizers, especially the addition of Azospirillum brasilemse + Bacillus megatherium to soil (B3), showed significant superiority in most vegetative growth traits, and gave highest increase in shoot length was 36,72 and 62,72 cm ,the increase in stem diameter was 9,390 and 14,41 mm for the two seasons, respectively, Addition of compost prepared from date palm leaves (C1) and prepared from wheat residues to soil (C2) resulted in an increase in most vegetative traits (increase in branch length, increase in transplants height, leaf chlorophyll content and leaves dry weight.