Response of Leaf area index, Chlorophyll Content and Protein Concentration of Sorghum to Application Different Rate of Nitrogen Fertilizer and Vermicompost Affected Water Stress Condition

Subject Areas : Journal of Crop Nutrition Science

Seyedeh Zohreh Hashemi ¹ , Saeed Zakernejad ² , Khoshnaz Payandeh ³

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.
3 - Assistant Professor, Department of Soil Science, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.

Received: 2020-12-29 Accepted : 2021-03-03 Published : 2021-06-01

Keywords: mineral, organic matter, <i>Crop production, Raceme, Water deficit</i>,

Abstract :

BACKGROUND: In organic agriculture, the main goal is increasing and maintains soil quality with a high biological activity. Also for economic production keep equilibrium between fertilizer and biofertilizer is necessary in sustainable agriculture. OBJECTIVES: Determine effect of different level of water deficit stress and combined effect of nitrogen fertilizer and vermicompost on quantitative and qualitative characteristics of Sorghum crop. METHODS: Current study was done via split plot experiment based on randomized complete blocks design with four replications. The main factor consisted water deficit stress at three level (A1: 70, A2: 100 and A3: 130 mm Class A evaporation pan) and combined effect of nitrogen fertilizer and vermicompost at five level (B1: 100% Nitrogen; 100% pure nitrogen equivalent to 200 kg per hectare, B2: 75% Nitrogen+25% Vermicompost, B3: 50% Nitrogen+50% Vermicompost, B4: 25% Nitrogen+75% Vermicompost, B5: 100% Vermicompost) belonged to sub plot. RESULT: Result of analysis of variance revealed effect of water deficit stress and combination nitrogen with vermicompost on all studied characteristics was significant but interaction effect of treatments was not significant (instead seed and biologic yield). Assessment mean comparison result indicated in different level of water deficit stress the maximum amount of leaf area index (4.15), number of seed per raceme (25.13), Chlorophyll index (53.04 Spad), Chlorophyll a (2.23 mg.g-1), Chlorophyll b (1.38 mg.g-1), Seed yield (4030.55 kg.ha-1), Biologic yield (1161.52 gr.m-2) and Harvest index (34.52%) was noted for 70 mm evaporation pan class A and minimum of that belonged to 130 mm evaporation pan class A treatment, but Protein percentage had reverse trend. Compare different level of combination nitrogen with vermicompost showed highest and lowest amount of mentioned traits belonged to 75% nitrogen+25% vermicompost and 100% vermicompost treatment. CONCLUSION: Generally result of current research proved the treatment of 75% nitrogen+25% vermicompost treatment under 70 mm evaporation pan class A produced highest amount of crop production and it can advised to farmers.

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