Abstract:
To study the allelopathic effects of sorghum mulch and concentrated sorghum water extract (Con.SWE) on suppression of weeds in wheat and grain yield under rain fed conditions, an experiment was conducted at the research farm, University of Arid Agriculture Rawalpindi, during Rabi 2000-2001. Treatments used were: Control (un-weeded check); Sorghum mulch@ 5 Mg ha- 1 (soil incorporated); Sorghum mulch@ 10 Mg ha-1 (soil incorporated); Con. SWE @ 10 liters ha-1 (one spray) 50 DAS; Con. SWE @ 10 liters ha-1 (two spray) 50 and 80 DAS; Con. SWE @ 20 liters ha-1 (one spray) 50 DAS; Con. SWE) @ 20 liters ha-1 (two spray) 50 and 80 DAS; Hand weeding (two) 50 and 80 DAS. The results of this experiment showed that incorporation of sorghum mulch @ 10 Mg ha-1 and two times sprays of Con.SWE @ 20 liters ha-1 at 50 and 80 DAS decreased weeds density by about 40%, reduced weeds fresh weight by 20 and 29 % and weeds dry weight by 27 and 34%, respectively over control. More tillers m-2, longer spikes, more grain spike-1 and heavier grains were recorded in plots where sorghum mulch @ 10 Mg ha-1 and two sprays of Con.SWE @ 20 liters ha-1 at 50 and 80 DAS were applied. Sorghum mulch soil incorporated @ 10 Mg ha-1 and two sprays of Con.SWE @ 10 liters ha-1 at 50 and 80 DAS increased wheat grain yield by 20 and 31%, respectively compared to control. Maximum increase in wheat grain yield by 33.24% over control was recorded in plots where two times Con.SWE @ 20 liters ha-1 was sprayed at 50 and 80 DAS.
Page(s):
667-672
DOI:
DOI not available
Published:
Journal: Sarhad Journal of Agriculture, Volume: 22, Issue: 4, Year: 2006