Vol. 8, Issue 3 (2020)
Critical limit of boron in acid laterite soil for cultivation of sunflower (Helianthus annus L.)
Author(s): Krupali Jagadala and Jyoti Prakash Sahoo
Abstract: The present investigation was carried out to study the critical limit of boron and its response to Sunflower (Helianthus annus L.) in acid laterite soils of Odisha. This work will be of immense importance of recommending appropriate doses for soil boron application. The critical limit of boron in soil and plant is the level below which there is appreciable response to boron application. The concept of critical limit distinguishes deficiency from sufficiency, which could be employed to advice on need for nutrient fertilization. It has been realized as the second most important micronutrient constraint in crops after that of zinc (Zn) on global scale. Deficiency of B mainly occurs in acidic and lateritic soils. Its application only slightly above the optimum level proves to be toxic to plants. Therefore the study was taken up emphasizing the need for a careful appraisal of available B status in soils for judicious use of boron fertilizers and establishing the critical concentration of boron in Sunflower. The experiment was laid out in factorial completely randomised block design in laterite Soil during Zadi, in 2018 at AICRP on Micronutrients, department Soil science and Agricultural chemistry, OUAT, Bhubaneswar, with two factors (5 Soil types and 5 boron doses of 0kg boron/ha, 0.5kg boron/ha, 1.0kg boron/ha, 1.5kg boron/ha and 2kg boron/ha.) with 25 treatments replicated twice. The plant height, seed dry weight and number of seeds per head showed positive and significant correlation with the soil boron application in all soil type except in soil type 2 and soil type 3 where the growth declined after kg/ha and kg/ha respectively. The critical limit of boron was found to be 0.58ppm in soil and 23.4 ppm in plants.
DOI: 10.22271/chemi.2020.v8.i3aj.9589
Pages: 2510-2513 | 327 Views 61 Downloads
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How to cite this article:
Krupali Jagadala, Jyoti Prakash Sahoo. Critical limit of boron in acid laterite soil for cultivation of sunflower (Helianthus annus L.). Int J Chem Stud 2020;8(3):2510-2513. DOI: 10.22271/chemi.2020.v8.i3aj.9589
