Assessment of the suitability of selected extractants for boron in some <i>inceptisols</i> of Eastern India under sunflower (<i>Helianthus annuus</i> L.)

Phonglosa, Amit; Bhattacharyya, Kallol; Pari, Arnab; Ray, Krishnendu; Banerjee, Hirak; Haldar, Sanjay; Sengupta, Sudip; Bhattacharya, Parijat; Mandal, Jajati

Abstract

Sunflower; as a contingent crop, is often exposed to boron (B) deficiency in soils of low fertility. The deficiency and toxicity of B being very narrow, warrants the need for its proper estimation in soil-plant systems through specific extractants. To facilitate this, a pot experiment was conducted with sunflower (cv. PAC 361) in 15 selected soil series. Five B doses (0, 0.25, 0.50, 0.75, and 1.0 mg kg−1) were applied to three replications. Soil B was extracted using six extractants (Hot-Water, DTPA-Sorbitol, Mehlich-3, Hot-CaCl2, KH2PO4, and Tartaric acid) and compared against plant parameters at 80 days after seedling emergence and harvest. The B extracted was in the order of Mehlich-3 > Hot-CaCl2 > KH2PO4 > Hot-Water > Tartaric acid > DTPA-Sorbitol. Standard correlation between soil and plant B revealed Mehlich-3 as the best soil extractant (r = 0.98**, stalk at 80 DAE); (r = 0.98**, seed at harvest) and (r = 0.97**, stalk at harvest). The critical limits of extractable B estimated by the statistical procedure were 0.47 mg kg−1 for Mehlich-3 extractable B in soil, 34.0 mg kg−1 for sunflower 3rd leaf B (at 80 DAE), and 19.06 mg kg−1 for sunflower seed B (at harvest).

Citation

Phonglosa, A., Bhattacharyya, K., Pari, A., Ray, K., Banerjee, H., Haldar, S., …Mandal, J. (in press). Assessment of the suitability of selected extractants for boron in some inceptisols of Eastern India under sunflower (Helianthus annuus L.). Journal of Plant Nutrition, 46(17), 1-16. https://doi.org/10.1080/01904167.2023.2231020

• Journal Article Type: Article
• Acceptance Date: May 25, 2023
• Online Publication Date: Jul 10, 2023
• Deposit Date: Oct 9, 2023
• Journal: Journal of Plant Nutrition
• Print ISSN: 0190-4167
• Publisher: Taylor and Francis
• Peer Reviewed: Peer Reviewed
• Volume: 46
• Issue: 17
• Pages: 1-16
• DOI: https://doi.org/10.1080/01904167.2023.2231020
• Keywords: Agronomy and Crop Science, Physiology