Essay Example on Study the response of sugarbeet to soil applied Boron








ABSTRACT A field experiment was conducted to study the response of sugarbeet to soil applied boron 0 5 0 75 1 0 1 5 and 2 0 kg B ha 1 in loamy sand soil during Rabi season 2014 15 The experiment soil was low in organic carbon 0 36 hot water soluble boron 0 43 mg B kg 1 soil and available nitrogen 120 kg ha 1 medium in available potassium 212 8 kg ha 1 and phosphorus 18 7 kg ha 1 With increase in the rate of boron application upto 2 kg B ha 1 a significant and progressive increase in available boron in soil was noticed which resulted in improved boron content in root and foliage of the sugarbeet crop A curvilinear relationship between different rates of boron appliedand root yield foliage yield and sugar content yield indicated that application of 1 0 kg B ha 1 was adequate to get optimum yield and resulted in increase in the root yield 5 0 foliage yield 27 0 and sugar content 8 0 over the control The agronomic efficiency was increased with boron application upto 1 0 kg B ha 1 beyond this level a decline in agronomic efficiency was recorded Keywords Boron Loamy sand soil Sugarbeet Sugar content INTRODUCTION Boron B is a vital micronutrient required for normal growth and development of plants It is a very sensitive element and plants differ widely in their requirement the range of deficiency and toxicity level are narrow Boron deficiency in crop plants is widespread throughout the world Goldberg et al 1993 Intensive cropping improved crop varieties with high crop productivity have caused depletion of plants nutrients more so that of micronutrients

Boron is one of the most important micronutrients Most important roles of boron include sugar transport cell wall synthesis lignification ribose nucleic acid RNA metabolism respiration cell division and seed development Boron deficiency has been realized as the second most important micronutrients constraint in crops after that of zinc on the global scale Boron deficiency has been reported in 132 crops in 80 countries Shorrocks 1997 and is a chief cause of crop yield loss in China India Nepal and Bangladesh Anantawiroon et al 1997 In India B deficiency has been observed in 33 per cent soils which is widespread particularly in alluvial soils In Punjab state B deficiency has started appearing and will be emerging as one of limiting factors for crops production in nearby future as 10 12 per cent soils of Punjab are low in available boron Boron deficiency has been found to affect adversely productivity of different crops Boron deficiency occurred in crop plants grown on light textured sandy soils with relatively low amount of organic matter Singh and Nayyar 1999 A positive response to B application which provided clear evidence of boron deficiency has also been reported in various parts of India Optimum yields were obtained when soybean crop was supplied with the adequate amount of this nutrient Ross et al 2006 Crop response to B application has been documented for wheat Soylu et al 2004 sunflower

Asad Blamey and Edwards2002 Oyinlola 2007 chickpea Ceyhan et al 2007 and Brusselssprout cultivars Turan et al 2008 The application of Mg and B is essential for improvingyield potentials of chickpea and lentil Khanam et al 2000 Soil B concentrations above 1 5 2 0 mg L 1 or below 0 5 mg L 1 resulted in decreased carrotroot yield Szmit 1980 However in cole crops such as cauliflower broccoli and cabbage the B requirement isvery high The necessities of B in vegetables are commonly more than in other crops Narayan et al 1989 observed that application 2 2 kg B ha 1 through the soil application produced the highest top 18 6 t ha 1 and beet 49 6 t ha 1 yield sucrose per cent 14 9 in beet juice total sugar content and improved the quality of sugarbeet Gobarahet al 2005 reported application of boron 1 5 kg B ha 1increased root length diameter and sugarbeet root yield However increasing boron fertilizer up to 2 0 kg ha 1 resulting in the highest sugar and recoverable sugar yields 6 6 and 5 6 t ha 1 Sucrose recoverable sucrose and juice purity percentages were amplified by adding boron The application of boron at the rate of 1 0 kg B ha 1 and 1 25 kg B ha 1 produced the higher yield of carrot 14 0 and 18 0 respectively higher B uptake 47 8 and 93 1g ha 1 respectively and caused decrease in carrot root injury 42 0 and 39 0 respectively in comparison with control Sultana et al 2015 The application of boron at the rate of 0 5 mg B L 1 significantly increased the development response and yieldof radish plants over control Tariq et al 2006 However little is known about the B response of sugarbeet to soil applied boron in loamy sand soil of Punjab The objective of this study was to study the influence of soil applied boron on yield and yield attributes of sugarbeet in Loamy sand soil

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