Investigation Growth Indices Analysis and Sorghum ( Sorghum bicolor L.) Crop Production Affected Different Level of Nitrogen and Nitroxin Bio-Fertilizer


1 Msc. Graduated, Department of Agronomy, Ahvaz branch, Islamic Azad University, Ahvaz, Iran.

2 Assistant Professor, Department of Agronomy, Ahvaz branch, Islamic Azad University, Ahvaz, Iran.


BACKGROUND: Bio-fertilizers being essential components of organic farming play vital role in maintaining long term soil fertility and sustainability.
OBJECTIVES: Study yield and growth indices of sorghum in response to consume chemical fertilizer and Nitroxin bio-fertilizer.
METHODS: This research was conducted via split plot experiment based on completely randomized block design with three replications in research field of Ahvaz Islamic Azad University. Pure nitrogen from urea source was used as the main plot in four levels (0, 50, 100, 150 kg.ha-1) and Nitroxin bio-fertilizer was used as sub plot in two levels (lack of use of bio-fertilizer and use of 1 L.ha-1 Nitroxin per 200 kg seeds). 
RESULT: According result of analysis of variance effect of different level of nitrogen and Nitroxin on seed yield, biologic yield and harvest index was significant at 1% probability level but interaction effect of treatments on harvest index was not significant. Assessment mean comparison of different levels of nitrogen fertilizer indicated that the highest seed yield (341 g.m-2), biologic yield (1218 g.m-2) and harvest index (28%) belonged to the treatment with consumption of 150 kg.ha-1 nitrogen and the lowest amount of seed yield (200 g.m-2) biologic yield (1045 g.m-2) and harvest index (20%) was for non-consumption of nitrogen (control). Use 1 L.ha-1 Nitroxin led to achieve highest seed yield (324 g.m-2), biologic yield (1185 g.m-2) and harvest index (27%) compare to control treatment. The highest leaf area index was obtained in the application of bio-fertilizer compared to non-consumption (4.5), and the non-use of biological fertilizer with a maximum leaf index was 3.8. Net assimilation rate in the use of biological fertilizer at 25 days after planting the equivalent of 10 gr.m-2 per day started and in the 47 days after planting, it was 6.3. The non-use of biological fertilizer
began at 8.1 after 25 days after planting and reached 6.1 in 47 days after planting.
CONCLUSION: So finally consume 150 kg.ha-1 chemical nitrogen fertilizer with 1 L.ha-1 Nitroxin bio-fertilizer advised for farmers. 


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