Effect of some sorghum cultivar residues on emergence and growth of broad bean

ABSTRACT

An experiment was conducted on Agricultural and Biological Research Labs. I.O.N.E.C. from 17/7/2000 till 16/3/2001. Experiment included sowing five sorghum cultivar seeds [i.e Rasoul, Motamyes, SD-10 and SD-9]. Sorghum plants were pulled out with its roots at physiological ripening stage, dried, grilled, and then used with soil at a rate of 3 and 6 g. residues/kg. soil, to study the direct effect on emergence and growth of broad bean. Results indicated that, sorghum residues added to the soil at t rate of 3 or 6 g. emergence of broad bean. On the other hand, the concentration of 6 g/residues/kg. Soil reduced the total plant dry weight compared to the control, but 3 g. residues/kg. Soil induced plant growth, i.e. plant height from 40.4 cm. to 44.4 cm and total plant dry weight from 30.5 g/plant to 36.8 g/plant when compared with 3 g. peatmoss/kg. Soil, respectively. Considerable variations were observed on the allelopathic effect among the tested cultivars against broad bean plant. Rasoul cv. was the most inhibitor cv. [plant height was 40.1 cm. and total plant dry weight was 33.1 g/plant], while Tabit cv. Was the least inhibitor cv. [plant height was 46.7 cm and total plant dry weight was 39.7 g/plant]