Combined Application of Boron and Zinc Improves Seed and Oil Yields and Oil Quality of Oilseed Rape (Brassica napus L.)
Author:
Safdar Muhammad Ehsan1, Qamar Rafi1, Javed Amara1, Nadeem Muhammad Ather1ORCID, Javeed Hafiz Muhammad Rashad2ORCID, Farooq Shahid3ORCID, Głowacka Aleksandra4ORCID, Michałek Sławomir5ORCID, Alwahibi Mona S.6ORCID, Elshikh Mohamed S.6ORCID, Ahmed Mohamed A. A.78ORCID
Affiliation:
1. Department of Agronomy, College of Agriculture, University of Sargodha, Sargodha 40100, Pakistan 2. Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, Vehari 61100, Pakistan 3. Department of Plant Protection, Faculty of Agriculture, Harran University, Şanlıurfa 63050, Turkey 4. Department of Plant Cultivation Technology and Commodity Sciences, University of Life Sciences in Lublin, 13 Akademicka Street, 20-950 Lublin, Poland 5. Department of Botany and Plant Physiology, University of Life Sciences in Lublin, 13 Akademicka Street, 20-950 Lublin, Poland 6. Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia 7. Plant Production Department (Horticulture—Medicinal and Aromatic Plants), Faculty of Agriculture (Saba Basha), Alexandria University, Alexandria 21531, Egypt 8. School of Agriculture, Yunnan University, Chenggong District, Kunming 650091, China
Abstract
Oilseed crops require several micronutrients to support their physiological functions and reproductive phases. A deficiency of these nutrients can significantly reduce the yield and oil quality of oilseed crops. Soil application of micronutrients can reduce their deficiency and improve plant growth, yield, and oil quality. Oilseed rape (Brassica napus L.) is an important oilseed crop that produces oil with low levels of saturated fat and high levels of beneficial omega-3 fatty acids, which renders it a widely used cooking oil. However, the yield and oil quality of oilseed rape are significantly affected by the deficiency of boron (B) and zinc (Zn). This two-year field study determined the influence of sole and combined soil application of B and Zn on the physiological attributes of plants, seed and oil yields, and oil quality under semiarid climatic conditions. Nine different B and Z combinations, i.e., B0 + Zn0 (control), B0 + Zn8, B0 + Zn10, B1 + Zn0, B1 + Zn8, B1 + Zn10, B2 + Zn0, B2 + Zn8, and B2 + Zn10 (kg ha−1), were included in the study. Sole and combined application of B and Zn significantly altered physiological attributes, seed and oil yields, and oil quality. The highest values for plant height, number of siliques per plant, number of seeds per silique, 1000-seed weight, seed and oil yields, oil quality (higher stearic acid, palmitic acid, oleic acid, linoleic acid, linolenic acid, and lower erucic acid), and physiological traits (protein concentration, soluble sugar concentration, chlorophyll concentration, photosynthesis and transpiration rates, and stomatal conductance) were recorded with the combined application of 2 + 8 kg ha−1 B and Zn, respectively, during both years of this study. The lowest values of yield- and oil-quality-related traits and physiological attributes were recorded for the control treatment. A dose-dependent improvement was recorded in B and Zn contents in leaves, and the highest values were recorded with the combined soil application of 2 + 10 kg ha−1 B + Zn, respectively. It can be concluded that 2 + 8 kg ha−1 B + Zn should be applied to oilseed rape for higher seed and oil yields and better oil quality under semiarid climatic conditions.
Funder
University of Life Sciences in Lublin Minister of Education and Science of Poland King Saud University
Subject
Agronomy and Crop Science
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