نوع مقاله : مقاله پژوهشی
نویسندگان
1 Lorestan University, Khorramabad, Iran
2 استادیار بخش تحقیقات گیاهپزشکی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان لرستان، سازمان تحقیقات، آموزش و ترویج کشاورزی،
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Objectives: The aim of this study was to evaluate the competitive ability of chickpea and optimize planting density to control weed populations in winter crops.
Materials and Methods: An experiment was conducted to evaluate the effects of mixing of cultivars and crop density on weed populations in chickpea winter planting as factorial- split in a randomized complete block design during 2015-16 and 2016-17 growing seasons in rainfed conditions in Khorramabad, Iran. The experimental factors consisted of mixing the cultivars in three levels (Adel cultivar monoculture with stand-up growth type, Lorestan cultivar with prostrate growth type, and mixing culture of Adel and Lorestan cultivars), crop density at 3 levels (25, 50 and 75 plants.m-2) and weed management in three levels (weedy check, application of herbicide pyridite, and weeding).
Results: In the first year, the lowest weed density was found in a mixed crop of Lorestan local variety and Adel cultivar at 50 plants.m-2. Increasing planting density from 25 to 75 plants.m-2 reduced weed density by up to 56.4% and weed biomass by up to 60%.
The highest seed yield (1586 kg. ha) was achieved with the Adel cultivar at 75 plants.m-2under weeding conditions. In the second year, Lorestan cultivar and mixed crops had lower weed densities than Adel, and proper density combined with weeding prevented a 94.6% decrease in chickpea seed yield.
Conclusion: Mixed cropping of cultivars with stand-up and prostrate types growth strategies can be used along with other factors affecting the crop competitive ability to reduce the weed interference.
کلیدواژهها [English]
)