Effects of plant density and different amounts of nitrogen on remobilization changes in yield of corn (Zea mays L.) S.C. 704

Subject Areas : agronomy

Mandana Sotodeh ¹ , Mojtaba AlaviFazel ²

1 - M.Sc. graduated student of Agronomy, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
2 - Associate Prof, Department of Agronomy, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran

Received: 2020-09-25 Accepted : 2020-10-30 Published : 2020-09-21

Keywords: Grain yield, nitrogen, corn, Remobilization, Plant density,

Abstract :

To evaluate of the role of remobilization in yield of corn (S.C. 704)in conditions of change of density and nitrogen, this experiment was conducted as a factorial based on randomized complete block design with three replications in Ramhormoz city, southwest of Iran, during 2015-2016 cropping season. a factor consisted of plant density per square meter (8, 10 and 12) and another factor of pure nitrogen consumption (from 46% urea source) included 50, 100, 150 kg. ha-1.The results showed that the plant density and nitrogen fertilizer significant effect on grain yield, biological, remobilization, remobilization and contribution of current photosynthesis is. The highest grain yield (8090.4 kg. ha-1) of 8 plants per square meter and the lowest (6480.1 kg. ha-1) were obtained from 12 plant per square meter. The highest grain yield (8650.7 kg. ha-1) was obtained from 150 kg. ha-1 nitrogen fertilizer treatment and the lowest (6160.7 kg. ha-1) was obtained from 50 kg. ha-1nitrogen fertilizer treatment. Most current photosynthesis and remobilization and current photosynthesis contribution of 8 plants per square meter and 150 kg of nitrogen per hectare, respectively. Most remobilization of 8 plants per square meter (143.1 g.m-2), respectively. Overall, the experimental results showed that consumption of 150 kg / ha of pure nitrogen at a density of eight plants per square meter could increase grain yield by 46% compared to consumption of 50 kg / ha nitrogen and a density of 12 plants per square meter and improve corn production. 

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