Investigating the effects of planting date and application of organic fertilizers on the physiological, agronomical and qualitative characteristics of soybean (Glycine max L.)

Document Type : Research Paper

Authors

1 5th Kilometer of Khorramabad-Boroujerd Highway

2 Department of Agrotechnology, Lorestan University

3 Department of Plant Production Engineering, Faculty of Agriculture, Lorestan University

Abstract

To investigate the effects of planting date and organic fertilizers on various physiological, agronomical, and qualitative characteristics of soybean (cv. Kowsar), a factorial experiment was conducted based on a randomized complete block design with three replications at the research farm of the Faculty of Agriculture, Lorestan University, in 2021. This research considered three levels of planting date (April 04, May 05, and June 05) and three levels of organic fertilizers (vermicompost at 10 tons per hectare, manure at 30 tons per hectare, and a combined treatment of 5 tons of vermicompost and 15 tons of manure). According to the results, the 1000-grain weight, seed yield, and biological yield increased by 20.46%, 21.56%, and 17.22%, respectively, in the combined treatment of manure and vermicompost. The highest amounts of oil (25.26%) and seed protein (43.67%) were obtained from the manure treatment on the first and third planting dates. In the combined treatment of manure and vermicompost under the second planting date conditions, the rate of photosynthesis was 8.13% higher, and the photosystem II quantum efficiency was 5.7% higher compared to the control. Overall, the best results were observed in the combined treatments of manure and vermicompost and the second planting date.

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Iranian Journal of Field Crop Science
Volume 55, Issue 4
December 2024
Pages 47-63

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History

  • Receive Date: 31 January 2024
  • Revise Date: 27 May 2024
  • Accept Date: 02 June 2024
  • Publish Date: 21 December 2024

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