نوع مقاله : مقاله پژوهشی
1 کارشناس ارشد زراعت دانشکده کشاورزی دانشگاه شاهد
2 دانشیار گروه زراعت دانشکده کشاورزی دانشگاه تربیت مدرس
3 استادیار گروه گیاهپزشکی دانشکده کشاورزی دانشگاه لرستان
عنوان مقاله [English]
To evaluate the effect of manure and Azotobacter application on yield and yield components of maize, an experiment was carried out in Ecological Research Station of Khorramabad in 2007. Four plant densities (75, 85, 95 and 105 thousand plants per ha) and manure at 80% and 100% (24 and 30 ton.ha-1) and two levels of Azotobacter chroococcum (inoculation and uninoculation), were arranged in a split split plot design based on randomized complete block design with three replications. Results showed that plant density had significant effect on biological yield, grain yield and number of ears per unit area. Increasing of plant density from 75000 to 105000 plants.ha-1 increased 42% of biological yield, 65% of grain yield and 42% of the number of ears per unit area. Totally, results from current research showed that under climate conditions of Khorramabad, the autumn crops are harvested in early summer next year. Therefore, corn plant can be considered in rotation cycle as the second culture. Also, the plant density of 95000 plant.ha-1 and application of 24 ton.ha-1 manure for supplying plant nutrition are suitable for corn as second culture. It seems that there is not the suitable conditions to show the beneficial effects of bacteria in rich soils of nutrients (manure application).