Can different sowing dates affect weed control efficacy and chickpea yield?

Two independent field experiments were carried out on two sowing dates. The experimental factors included three herbicides (trifluralin, pendimethalin, and linuron) using the method of incorporation by sowing, inter-row cultivation, and control (weed-free and weed-infested). The density of weeds ۴۵ days after sowing, applying pendimethalin, linuron, and inter-row cultivation on the first sowing date (FSD), was ۲۶.۵, ۳۱.۸, and ۴۵.۹% less than the second sowing date (SSD), respectively. On the contrary, at the flowering stage, weeds on the SSD were ۵۹% less than the FSD, and the average weed density in applying pendimethalin and linuron was ۷۸.۷% less than their density in the weed-infested. The height of the plant and the height of the first pod from the soil surface on the FSD were ۱۳% and ۱۱% higher, respectively, compared to the SSD. The average number of branches per plant with experimental treatments was ۳۷% more than the weed-infested ones. The maximum biological yield of chickpeas in the FSD and SSD was obtained by inter-row cultivation (۷۶۰ g m-۲) and pendimethalin (۷۴۹ g m-۲), respectively. On the FSD, the seed yield in applying pendimethalin was ۸۲.۵%, and its average in linuron and inter-row cultivation was ۸۶.۴% more than the weed-infested control. Also, on the SSD, the average seed yield in the three mentioned treatments was ۷۳.۶% more than the weed-infested control. However, linuron and inter-row cultivation were identified as the most appropriate treatments for weed control in the early stages of both sowing dates.

کلیدواژه ها:

Incorporation ، inter-row cultivation ، linuron ، pendimethalin ، sowing date