Improvement of Physiological Growth Indices and Yield of Soybean (Glycine max L. ) by Replacing some of Nitrogen with Phosphorus under Moisture Stress

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Sadeghi Farasat; ABOUTALEBIAN MOHAMMAD ALI

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Paper Information

Journal: JOURNAL OF CROP ECOPHYSIOLOGY (AGRICULTURE SCIENCE) Year:2019 | Volume:13 | Issue:2 (50) Page(s): 171-192

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Information Journal Paper

Title

Improvement of Physiological Growth Indices and Yield of Soybean (Glycine max L. ) by Replacing some of Nitrogen with Phosphorus under Moisture Stress

Author(s)

Sadeghi Farasat | ABOUTALEBIAN MOHAMMAD ALI | Issue Writer Certificate

Keywords

Crop Growth RateQ3

Dry MatterQ1

Leaf Area IndexQ2

Net Assimilation RateQ2

Oil YieldQ2

Abstract

To study some growth indices of soybean under moisture stress by replacing nitrogen with phosphorus, a field experiment was conducted at the Research Station of Bu-Ali Sina University during the 2017-2018 growing season. The experiment was carried out in a split-factorial arrangement of treatments based on randomized complete block design with three replications. The main plots consisted of three levels of irrigations (irrigating after 60, 90 and 120 mm evaporation from class A evaporation pan). Two levels of nitrogen replacement with phosphorus and without replacement and two levels of phosphorus replacement and without phosphorus replacement assigned to subplots. The results showed that simultaneous replacing of nitrogen and phosphorus in all irrigation levels increased physiological growth indices of Leaf Area Index, Dry Matter accumulation, Crop Growth Rate, relative growth rate and Net Assimilation Rate. Moisture stress reduced growth rate of the crop significantly. Results also showed that Crop Growth Rate increased 35 to 45 days after planting and reached to its maximum level after 65 days after planting date. After this period, the Crop Growth Rate of soybean decreased and reached to zero about 95-100 days after planting. The highest Dry Matter accumulation and Crop Growth Rate were obtained from irrigation after 60 mm evaporation and nitrogen-phosphorus simultaneous placement application. According to the results, simultaneous replacing nitrogen and phosphorus, reduced the negative effect of moisture stress on soybean growth indices. Nitrogen replacement with phosphorus increased grain yield by 11. 4% as compared to non-replacement of nitrogen with phosphorus and yielded 3855. 88 kg. ha-1. In this research, nitrogen replacement with phosphorus under irrigation after 90 mm evaporation prevented significant Oil Yield loss as compared to irrigation after 60 mm evaporation.

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APA: Copy

Sadeghi, Farasat, & ABOUTALEBIAN, MOHAMMAD ALI. (2019). Improvement of Physiological Growth Indices and Yield of Soybean (Glycine max L. ) by Replacing some of Nitrogen with Phosphorus under Moisture Stress. JOURNAL OF CROP ECOPHYSIOLOGY (AGRICULTURE SCIENCE), 13(2 (50) ), 171-192. SID. https://sid.ir/paper/182621/en

Vancouver: Copy

Sadeghi Farasat, ABOUTALEBIAN MOHAMMAD ALI. Improvement of Physiological Growth Indices and Yield of Soybean (Glycine max L. ) by Replacing some of Nitrogen with Phosphorus under Moisture Stress. JOURNAL OF CROP ECOPHYSIOLOGY (AGRICULTURE SCIENCE)[Internet]. 2019;13(2 (50) ):171-192. Available from: https://sid.ir/paper/182621/en

IEEE: Copy

Farasat Sadeghi, and MOHAMMAD ALI ABOUTALEBIAN, “Improvement of Physiological Growth Indices and Yield of Soybean (Glycine max L. ) by Replacing some of Nitrogen with Phosphorus under Moisture Stress,” JOURNAL OF CROP ECOPHYSIOLOGY (AGRICULTURE SCIENCE), vol. 13, no. 2 (50) , pp. 171–192, 2019, [Online]. Available: https://sid.ir/paper/182621/en

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