Document Type : Research Paper


1 Ph. D. Student, Agronomy Department, Takestan Branch, Islamic Azad University, Takestan, Iran.

2 Associate Professor, Agronomy Department, Takestan Branch, Islamic Azad University, Takestan, Iran.

3 Assistant Professor, Crop and Horticultural Science Research Department, Guilan Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Rasht, Iran.

4 Assistant Professor, Agronomy Department, Takestan Branch, Islamic Azad University, Takestan, Iran.


In order to evaluate of grain yield of groundnut under intercropping with corn under the application of phosphorus chemical and bio-fertilizers, this experiment is performed as factorial arrangement based on randomized complete block design with three replications in Rasht, Iran in 2017 and 2018 cropping seasons. Five level of phosphorus fertilizer (PF) as triple super phosphate (TSP) including 1. Zero (as control), 2. 50 kg/ha TSP, 3. 100 kg/ha TSP, 4. 50 kg/ha TSP + 200 g/ha Barvar2 phosphate bio-fertilizer (BPB), and 5. 100 kg/ha TSP + 200 g/ha BPB, and five intercropping pattern (IP) including 1. maize sole cropping, 2. groundnut sole cropping, 3. intercropped groundnut-maize with the ratio of 1:1, 2:1, and 1:2 rows, comprise the experimental treatments. According to the results from this experiment, the interaction effect between phosphorus fertilizer × intercropping system has been significant for all measured characteristics. Maximum grain yield of maize and groundnut are observed in the application of 100 kg/ha phosphorus fertilizer plus 200 g Barvar2 phosphat bio-fertilizer under sole crop. The combined usage of chemical and biological phosphorus fertilizer increase grain yield of maize and groundnut under sole crop. The highest land equivalent ratio (LER) equal 1.88 can be seen under control treatment and maize-groundnut intercropped system with the ratio of 1:1 rows. Intercropping system improve yield attributes of groundnut such as pod numbers per plant and grain number per pod, pod length, and diameter. Based on the results of this experiment, maize-groundnut intercropped system are advantageous for crop production per unit area. In addition, the concentration of nitrogen and phosphorus content in groundnut grain rise in response to the integrated application of chemical phosphorus and Barvar2 phosphat bio-fertilizer under maize-groundnut intercropped system. Maize-groundnut intercropped system with the ratio of 1:1 rows and the application of 100 kg/ha phosphorus fertilizer plus 200 g Barvar2 phosphat bio-fertilizer are superior to other treatments. Hence, Barvar2 phosphat bio-fertilizer superiority could be recommendable to enhance profitability and crop production at maize-groundnut intercropping system under region climatic condition.


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