Document Type : Research Paper

Authors

1 Former ph.D. Student, Departmant of Agronomy and Plant Breeding, University College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran

2 Associate Professor Departmant of Agronomy and Plant Breeding, University College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran

3 Assistant Professor respectively, Departmant of Agronomy and Plant Breeding, University College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran

4 Associate Professor of Soil Science University College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran

Abstract

In order to investigate the effect(s) of biologic and organic fertilizers on light consumption efficiency in growing maize-bean mixture, an experiment was conducted in the form of split plots in a randomized complete block design with 12 treatments. Main plots containing different fertilizer systems in four levels: including 30 kg / ha urea, Azotobacter, vermicompost, Azotobacter + vermicompost and subplots containing cultivation compound of pure maize and pure bean were 50% maize + 50% bean, + 60% maize + 60% pinto bean and 80% maize + 80% pinto bean. The results revealed that leaf area index, dry matter accumulation and light consumption efficiency of maize were significantly higher than pure culture. The highest light use efficiency was related to the combined use of Azotobacter and vermicompost in mixed culture of 80 % maize + 80% pinto beans with an average of 2.29 g / MJ, which increased the light use efficiency by 63% compared to 30 kg / ha of pure culture. Also, the highest dry matter related to the mixed culture of 60% maize + 60% pinto beans was obtained in the amount of 1728 g / m2, which increased the dry matter accumulation by 16% compared to pure culture. In general, the combined composition of organic and biologic fertilizers in intercropping has the ability to compete with urea chemical fertilizer in terms of mechanistic indicators of plant growth analysis.

Keywords