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The research was done in the vegetables research farm at the College of Agricultural Engineering Sciences at University of Dohuk, Kurdistan region of Iraq, during the growing season in (2021-2022). The reason behind the study was to investigate the response of two cultivars of Broccoli (Brassica oleracea var. italica.) Ajjasi and Wisdom cv. to different types of mulching (without, black plastic and straw) and also the different concentrations levels of licorice root extract (0, 6, 12 and18g.L-1) on productivity and some nutrients content of Broccoli curd. The results showed that Wisdom cultivar performed better than Ajjassi in terms of early yield and nutrients content. Throughout the research season, both cultivars were considerably improved in all examined attributes. Additionally, it was shown that all features in both cultivars were noticeably enhanced in plastic mulch. There was an observed increase in the majority of features of the interactions between licorice root extract and straw. Early yield in Wisdom cultivar was meaningfully different from Ajjasi (27.814 and 24.138) ton. ha-1 respectively. Most of the measurements were greatly influenced by black plastic mulch, while the best overall outcome was achieved in black plastic mulch and 18g.L-1 concentration of licorice root extract in Ajjassi cultivar. In both cultivars, there were noticeable changes in the nutrient’s contents of (Nitrogen, phosphorus, potassium %). In general, the combination among treatments was significantly enhanced in the all studied traits.


Broccoli Cultivars Extract Licorice root Mulching

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How to Cite
Yousif, K. H. ., & Saeid, A. J. I. . (2023). Response of Broccoli to Mulching and Foliar Application of Licorice Root Extract and their Effects on Yield and Macronutrient Contents. Basrah Journal of Agricultural Sciences, 36(1), 60–74.


  1. Alhamrani , K. S. L. ., Abdullah , A. A. ., & Taain , D. A. . (2019). Effect of Planting Dates, Soil Mulching and Foliar Spraying Calcium on The Quantitative Yield Characteristics of Okra Plant Grown in plastic Greenhouse. Basrah Journal of Agricultural Sciences, 32, 171–182.
  3. Al-Hasany, A. R. K. ., Aljaberi, M. A., & Alhilfi, S. K. (2019). Effect of Spraying with Seaweed Extract on Growth and Yield of Two Varieties of Wheat (Triticum aestivum L.). Basrah Journal of Agricultural Sciences, 32, 124–134.
  5. Association of Official Analytical Chemists (1990). Official Methods of Analysis of the Association of Official Analytical Chemists. 15th edition, Arlington, V.A.: 771pp.
  6. Anon (2006). Horticultural Research Program. Manual for vegetable production in Botswana. Dept. of Agricultural Research, Southern Africa.
  7. Buresh R. J., & De Datta S. K. (1991). Nitrogen dynamics and management in rice-legume cropping systems. Advance in Agronomy, 45, 1-59.
  9. Choudhary, S. K., Choudhary, G. L., & Prajapat, K. (2011). Response of Cowpea [Vigna unguiculata L.) to fertility levels and mulching. Environment and Ecology, 31(2), 492-495.
  10. Decoteau, D. R. (2000). Vegetable Crops. Prentice Rever. Upper Rever Company. New Jersey, 464p.
  11. Dvořák, P. J., Tomasek, P., Kuchtova, K., Hamouz, J., Hajslova, D., & Schulzova, V. (2012). Effect of mulching materials on potato production in different soil climatic conditions. Romanian Agricultural Research, 29, 201-209.
  13. Fang, S., Xie, B., Liu, D., & Liu, J. (2011). Effects of mulching materials on nitrogen mineralization, nitrogen availability and poplar growth on degraded agricultural soil. New Forests, 41, 147-162.
  14. Fang, P., Abler, D., Lin, G., Sher, A., & Quan, Q. (2021). Substituting organic fertilizer for chemical fertilizer: evidence from apple growers in china. Land, 10, 858-582.
  16. Gardner B. R., & Roth L. R. (1989). Midrib nitrate concentrations as a means for determining nitrogen needs of broccoli. Journal of Plant Nutrition, 12(1), 111-125.
  18. Islam, M. A., Ferdous, G., Akter, A., Hossain, M. M., & Nadwani, D. (2017). Effect of organic, inorganic fertilizers and plant spacing on the growth and yield of cabbage. Agriculture, 7(4), 31.
  20. Lamont, J. W. J. (2005). Plastics: Modifying the microclimate for the production of vegetable crops. HortTechnology, 15, 477-481.
  21. Liakatas, A., Clark, J. A., & Monteith, J. L. (1986). Measurements of the heat balance under plastic mulches part I. Radiation balance and soil heat flux. Agriculture For Meteorology, 36(3), 227-239.
  23. Mandrich, L., & Caputo, E. (2020). Brassicaceae-derived anticancer agents: Towards a green approach to beat cancer. Nutrients, 12(3), 868.
  25. Mittal, S. P., Grewal, S. S., Agnihotri, Y., & Sud, A. D. (1992). Substitution of nitrogen requirement of maize through leaf biomass of Leucaena leucocephala: agronomic and economic considerations. Agroforestry Systems, 19(3), 207-216.
  27. Meena, R. K., Trivedi, S. K., Nama, A., Kumar, L., & Mehta, J. (2020). Broccoli: Growth and yield effected by different biofertilizers and inorganic matter – A Review, Indian Journal of Pure and Applied Bioscience, 8(3), 149-153.
  29. Petrovska B. B. (2012). Historical review of medicinal plants' usage. Pharmacognocy Review, 6(11), 1-5.
  31. SAS Institute, Inc. (2007). Statistical analysis system. SAS institute Inc., Cary, NC. USA.
  32. Sharma, K. C. (2000). Influence of Integrated Nutrient management on yield and economics of broccoli (Brassicae oleracea L. var. italica Plenck.) under cold temperate conditions. Vegetable Science, 27(1), 62-63.
  34. Sharma, P. K, Kharwara, P. C., & Tewatia, R. K. (1990). Residual soil moisture and wheat yield in relation to mulching and tillage during preceding rainfed crop. Soil and Tillage Research, 15, 279-284.
  36. Yoldas, F., Ceylan, S., Yagmur, B., & Mordogan, N. (2008). Effect of nitrogen fertilizer on yield, quality and nitrogen content in Broccoli. Journal of plant Nutrition, 31, 1333-1343.
  38. Zhao, H., Lin, J., Barton, G. H., Hernandez, L. M., Dinney, C. P., & Wu, X. (2007). Dietary isothiocyanates, GSTMI, GSTTI, NAT2 polymorphisms, and bladder cancer risk. International Journal of Cancer, 120(10), 2208-213.