The Experts below are selected from a list of 135 Experts worldwide ranked by ideXlab platform
Fien Degryse - One of the best experts on this subject based on the ideXlab platform.
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Boron Fertilizers: Use, challenges and the benefit of slow-release sources – a review
2017Co-Authors: Fien DegryseAbstract:Boron (B) is an essential plant nutrient, but can be toxic when present in excess. Boron is usually present as an uncharged molecule (H 3 BO 3 0 ) in the soil solution and is highly mobile in most soils. Deficiency of B is therefore quite common in high-rainfall environments, especially on sandy soils. Boron Fertilizers are commonly used to correct its deficiency in crops. The most commonly used Fertilizers are soluble sodium borates (e.g., borax), but care should be taken with rates and placement of such B products, since elevated B concentrations may result in seedling toxicity and yield reduction. Moreover, significant leaching losses of applied B may occur in high-rainfall environments. Slow-release B sources reduce both the risk of seedling toxicity and of leaching, and can provide adequate supply of B over a longer period. This may allow for lower B rates or less frequent application compared to soluble Fertilizers. The most commonly used slow-release B sources are sparingly soluble ores, such as colemanite. The limited data in the literature indicate that the release rate of B from slow-release sources in soil depends both on fertilizer characteristics and soil properties. However, more research is needed to predict the release rate of B from various B ores for given soil and climatic conditions. In recent years, slow-release coatings and matrices for N Fertilizers have received considerable attention and these new technologies may potentially also be adopted for B-containing Fertilizers.
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Boron Fertilizers use challenges and the benefit of slow release sources a review
Journal of Boron, 2017Co-Authors: Fien DegryseAbstract:Boron (B) is an essential plant nutrient, but can be toxic when present in excess. Boron is usually present as an uncharged molecule (H 3 BO 3 0 ) in the soil solution and is highly mobile in most soils. Deficiency of B is therefore quite common in high-rainfall environments, especially on sandy soils. Boron Fertilizers are commonly used to correct its deficiency in crops. The most commonly used Fertilizers are soluble sodium borates (e.g., borax), but care should be taken with rates and placement of such B products, since elevated B concentrations may result in seedling toxicity and yield reduction. Moreover, significant leaching losses of applied B may occur in high-rainfall environments. Slow-release B sources reduce both the risk of seedling toxicity and of leaching, and can provide adequate supply of B over a longer period. This may allow for lower B rates or less frequent application compared to soluble Fertilizers. The most commonly used slow-release B sources are sparingly soluble ores, such as colemanite. The limited data in the literature indicate that the release rate of B from slow-release sources in soil depends both on fertilizer characteristics and soil properties. However, more research is needed to predict the release rate of B from various B ores for given soil and climatic conditions. In recent years, slow-release coatings and matrices for N Fertilizers have received considerable attention and these new technologies may potentially also be adopted for B-containing Fertilizers.
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formulation synthesis and characterization of Boron phosphate bpo4 compounds as raw materials to develop slow release Boron Fertilizers
Journal of Plant Nutrition and Soil Science, 2014Co-Authors: Margaret Abat, Fien Degryse, Roslyn Baird, Mike J. MclaughlinAbstract:We investigated the use of Boron phosphate (BPO 4 ) as a slow-release Boron (B) source. Boron phosphate compounds were synthesized by mixing boric acid (H 3 BO 3 ) and phosphoric acid (H 3 PO 4 ) and heating at temperatures of 25 to 1000C for 1 or 24 h. X-ray diffraction (XRD) patterns and chemical analysis confirmed the formation of BPO 4 . The crystallinity of these compounds increased with increasing temperature and heating time. The compounds synthesized at 300C or less were hygroscopic and clumped together, while those synthesized at 500 to 1000C were non-hygroscopic and free-flowing. The solubility of these compounds was assessed at different pH and P concentrations, and compared to the solubility of ulexite and colemanite. The solubility of the BPO 4 compounds decreased with increasing synthesis temperature and with decreasing pH. The solubility and the kinetics of B release from BPO 4 compounds synthesized at 500 and 800C were slower than for most commonly used B sources. Given their slow dissolution, the BPO 4 compounds may have potential to continuously supply B to crops in environments where B leaching is a problem. The compounds synthesized at 500 and 800C show potential for co-granulation with macronutrient Fertilizers such as mono-ammonium phosphate to produce slow-release B-enriched granules.
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Responses of Canola to the Application of Slow-Release Boron Fertilizers and Their Residual Effect
Soil Science Society of America Journal, 2014Co-Authors: Margaret Abat, Fien Degryse, Roslyn Baird, Mike J. MclaughlinAbstract:Boron (B) is essential for plant growth and the use of soluble B Fertilizers is common, but leaching can result in poor fertilizer use efficiency in high-rainfall areas. We assessed the response of canola (Brassica napus L.) in two consecutive crops to the application of co-granulated slow-release B fertilizer under simulated leaching conditions. The slow-release B sources were Boron phosphate (BPO₄) synthesized at 500 or at 800°C for 1 h. For comparison, the more soluble B sources borax, ulexite, and colemanite were also included. All B sources were co-granulated with monoammonium phosphate (MAP) at a nominal concentration of 1.0% (w/w) B. The pure B sources, not co-granulated with MAP, were also included (first crop only). In the first crop, B concentrations in shoots were in the toxic range when B was supplied with the more soluble B sources, and dry matter yield was reduced for the treatments with borax and ulexite. The dry matter yields were lower and B concentrations in the shoot were higher in the treatments with pure B sources than in those with the co-granulated B sources. In the second crop, B concentrations in shoots were in the deficient range for the treatments with borax and ulexite and the plants showed B visual deficiency symptoms, although dry matter yield was not significantly affected. In contrast, the B supply for the treatments with BPO₄ was adequate across both crops. The cumulative leaching loss of B for the treatments with co-granulated BPO₄ was low compared with that for the more soluble B sources. These results indicate that BPO₄ co-granulated products have potential as slow-release B Fertilizers in high-rainfall areas.
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responses of canola to the application of slow release Boron Fertilizers and their residual effect soil fertility plant nutrition
2014Co-Authors: Margaret Abat, Fien Degryse, Roslyn Baird, Mike J. MclaughlinAbstract:Soil Sci. Soc. Am. J. doi:10.2136/sssaj2014.07.0280 Received 7 July 2014. *Corresponding author (margaretabat@yahoo.co.uk). © Soil Science Society of America, 5585 Guilford Rd., Madison WI 53711 USA All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher. Permission for printing and for reprinting the material contained herein has been obtained by the publisher.
Lu Jian - One of the best experts on this subject based on the ideXlab platform.
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effects of nitrogen phosphorus potassium and Boron Fertilizers on winter oilseed rape brassica napus l direct sown in the yangtze river basin
Acta Agronomica Sinica, 2013Co-Authors: Lu JianAbstract:Oilseed rape is the dominant oil crop in China.Direct-sowing method has the great significance in increasing winter oilseed rape yield and guaranteeing national edible oil security.Field trials were conducted at 36 sites in the Yangtze River Basin to determine the fertilization effects of nitrogen(N),phosphorus(P),potassium(K),and Boron(B) on seed yield,economic benefit,nutrient uptake and Fertilizers efficiencies of direct-sown winter oilseed rape.Then we compared the differences between recommended fertilization and farmers’ fertilizer practice(FFP),and between direct-sowing and transplanting cultivations.The objective was to discuss and offer appropriate suggestions of fertilization management for direct-sown winter oilseed rape in China.Combination application of N,P,K,and B Fertilizers(NPKB) resulted in the greatest seed yield(2001 kg ha–1) and economic income(8205 Yuan ha–1),which were significantly higher than that of FFP treatment.The effects of different Fertilizers on oilseed rape as N PBK.Nutrient uptakes were obviously improved in NPKB treatment,with the average accumulation of 104.2 kg N ha–1,20.4 kg P ha–1,and 160.2 kg K ha–1.In addition,the apparent recovery efficiency of N,P,and K Fertilizers was 35.8%,22.3%,and 45.9% in NPKB treatment,respectively,which was considerably higher than that in FFP treatment(20.8%,7.2%,and 28.0%).Overall,our results demonstrated that suitable fertilization management(combination application of N,P,K,and B Fertilizers) would be recommended in the production of direct-sown oilseed rape at the current stage.Both fertilization time and ratio should be adjusted to coordinate with oilseed rape growth and nutrient uptake regulation under direct-sowing cultivation.
Mike J. Mclaughlin - One of the best experts on this subject based on the ideXlab platform.
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formulation synthesis and characterization of Boron phosphate bpo4 compounds as raw materials to develop slow release Boron Fertilizers
Journal of Plant Nutrition and Soil Science, 2014Co-Authors: Margaret Abat, Fien Degryse, Roslyn Baird, Mike J. MclaughlinAbstract:We investigated the use of Boron phosphate (BPO 4 ) as a slow-release Boron (B) source. Boron phosphate compounds were synthesized by mixing boric acid (H 3 BO 3 ) and phosphoric acid (H 3 PO 4 ) and heating at temperatures of 25 to 1000C for 1 or 24 h. X-ray diffraction (XRD) patterns and chemical analysis confirmed the formation of BPO 4 . The crystallinity of these compounds increased with increasing temperature and heating time. The compounds synthesized at 300C or less were hygroscopic and clumped together, while those synthesized at 500 to 1000C were non-hygroscopic and free-flowing. The solubility of these compounds was assessed at different pH and P concentrations, and compared to the solubility of ulexite and colemanite. The solubility of the BPO 4 compounds decreased with increasing synthesis temperature and with decreasing pH. The solubility and the kinetics of B release from BPO 4 compounds synthesized at 500 and 800C were slower than for most commonly used B sources. Given their slow dissolution, the BPO 4 compounds may have potential to continuously supply B to crops in environments where B leaching is a problem. The compounds synthesized at 500 and 800C show potential for co-granulation with macronutrient Fertilizers such as mono-ammonium phosphate to produce slow-release B-enriched granules.
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Responses of Canola to the Application of Slow-Release Boron Fertilizers and Their Residual Effect
Soil Science Society of America Journal, 2014Co-Authors: Margaret Abat, Fien Degryse, Roslyn Baird, Mike J. MclaughlinAbstract:Boron (B) is essential for plant growth and the use of soluble B Fertilizers is common, but leaching can result in poor fertilizer use efficiency in high-rainfall areas. We assessed the response of canola (Brassica napus L.) in two consecutive crops to the application of co-granulated slow-release B fertilizer under simulated leaching conditions. The slow-release B sources were Boron phosphate (BPO₄) synthesized at 500 or at 800°C for 1 h. For comparison, the more soluble B sources borax, ulexite, and colemanite were also included. All B sources were co-granulated with monoammonium phosphate (MAP) at a nominal concentration of 1.0% (w/w) B. The pure B sources, not co-granulated with MAP, were also included (first crop only). In the first crop, B concentrations in shoots were in the toxic range when B was supplied with the more soluble B sources, and dry matter yield was reduced for the treatments with borax and ulexite. The dry matter yields were lower and B concentrations in the shoot were higher in the treatments with pure B sources than in those with the co-granulated B sources. In the second crop, B concentrations in shoots were in the deficient range for the treatments with borax and ulexite and the plants showed B visual deficiency symptoms, although dry matter yield was not significantly affected. In contrast, the B supply for the treatments with BPO₄ was adequate across both crops. The cumulative leaching loss of B for the treatments with co-granulated BPO₄ was low compared with that for the more soluble B sources. These results indicate that BPO₄ co-granulated products have potential as slow-release B Fertilizers in high-rainfall areas.
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responses of canola to the application of slow release Boron Fertilizers and their residual effect soil fertility plant nutrition
2014Co-Authors: Margaret Abat, Fien Degryse, Roslyn Baird, Mike J. MclaughlinAbstract:Soil Sci. Soc. Am. J. doi:10.2136/sssaj2014.07.0280 Received 7 July 2014. *Corresponding author (margaretabat@yahoo.co.uk). © Soil Science Society of America, 5585 Guilford Rd., Madison WI 53711 USA All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher. Permission for printing and for reprinting the material contained herein has been obtained by the publisher.
R. Ellinghaus - One of the best experts on this subject based on the ideXlab platform.
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Boron Fertilizers in rape a risk for honey bees
Journal of Applied Entomology, 2013Co-Authors: R. Siede, W. Dyrba, T. Augustin, A. Wiegand, R. EllinghausAbstract:Rape (Brassica napus L.) is foraged intensively by honey bees (Apis mellifera). Pesticide applications during bloom are sometimes combined with foliar Boron fertilizer applications. Boron has insecticidal properties, and therefore, risk to honey bees cannot be excluded. This study was conducted to test whether foliar Boron Fertilizers could be hazardous for bees under real field conditions. Six colonies were transferred to a rape field in bloom which was treated with Boron (1 kg/ha). Six control colonies were transferred to an untreated rape field approximately 7 km away. Performance parameters of the colonies were measured. Samples of honey and beebread were collected from all colonies before and after Boron fertilizer application. The contents of Boron and of Al, Cd, Cr, Fe, K, Mn, Ni, P, Pb, S and Zn were measured in honey by inductively coupled plasma mass spectroscopy (ICP MS) and by ICP–atomic emission spectroscopy (ICP-OES). No significant differences were found in honey yield (P = 0.622), number of capped brood (P = 0.089), number of uncapped brood (P = 0.123) or number of bees (P = 0.87). Application of Boron fertilizer did not affect the concentration of Boron in honey (P = 0.656) or beebread (P = 0.665). The concentrations of other elements confirmed the suitability of rape nectar for bee nutrition. This study suggests that the application of foliar Boron Fertilizers in blooming rape is not hazardous for bee colonies.
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Boron Fertilizers in rape – a risk for honey bees?
Journal of Applied Entomology, 2013Co-Authors: R. Siede, W. Dyrba, T. Augustin, A. Wiegand, R. EllinghausAbstract:Rape (Brassica napus L.) is foraged intensively by honey bees (Apis mellifera). Pesticide applications during bloom are sometimes combined with foliar Boron fertilizer applications. Boron has insecticidal properties, and therefore, risk to honey bees cannot be excluded. This study was conducted to test whether foliar Boron Fertilizers could be hazardous for bees under real field conditions. Six colonies were transferred to a rape field in bloom which was treated with Boron (1 kg/ha). Six control colonies were transferred to an untreated rape field approximately 7 km away. Performance parameters of the colonies were measured. Samples of honey and beebread were collected from all colonies before and after Boron fertilizer application. The contents of Boron and of Al, Cd, Cr, Fe, K, Mn, Ni, P, Pb, S and Zn were measured in honey by inductively coupled plasma mass spectroscopy (ICP MS) and by ICP–atomic emission spectroscopy (ICP-OES). No significant differences were found in honey yield (P = 0.622), number of capped brood (P = 0.089), number of uncapped brood (P = 0.123) or number of bees (P = 0.87). Application of Boron fertilizer did not affect the concentration of Boron in honey (P = 0.656) or beebread (P = 0.665). The concentrations of other elements confirmed the suitability of rape nectar for bee nutrition. This study suggests that the application of foliar Boron Fertilizers in blooming rape is not hazardous for bee colonies.
X U Fangsen - One of the best experts on this subject based on the ideXlab platform.
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effect of different Boron Fertilizers on seed yield and seed quality of oilseed rape brassica napus and their residual effectiveness for rotated rice
Plant Nutrition and Fertilizing Science, 2011Co-Authors: X U FangsenAbstract:The effects of two kinds of Boron(B) slow-release Fertilizers,Etibor-48(EB;Na2B4O7·5H2O) and Colemanite(CB;Ca2B6O11·5H2O),on seed yield and seed quality of oilseed rape(Brassica napus) and their residual effectiveness for rotated rice were investigated in pot culture experiments and field trials,respectively.Seed yield of oilseed rape in the EB and CB treatments was significantly higher than that in the absence of Boron(-B),and higher than that of borax treatment(B) for the first crop.Field trial results of the first crop(oilseed rape) in Anhui province,China,were consistent with those of the pot culture experiments.Grain yield of the second crop(rice) in all B fertilizer treatments was slightly higher than that of the-B treatment in the pot culture experiment;however,there was no significant difference in seed yield between the B application treatments(EB and CB) and-B treatment in field trials in both Anhui and Hubei provinces.Pot culture experiments indicated that seed yield of the third crop(oilseed rape) was significantly lower than that of the first crop.In addition,there was no significant difference in seed yield of oilseed rape among the B fertilizer treatments,but seed yield in these treatments was significantly higher than that of the-B treatment.Seed yield of the third crop of oilseed rape in both B application treatments was also higher than that of the-B treatment and CB achieved the highest seed yield in field trials in Anhui province.Split plot experiments in Anhui province indicated that seed yield of oilseed rape in all B application treatments was slightly higher than that of each corresponding-B treatment for the third crop,and there was no significant difference in seed yield among the B application treatments.Residual effectiveness in the field trials conducted in Anhui and Hubei were not consistent,which could be attributed to a higher soil-available B content in the Hubei experimental plot than that in Anhui.For B-deficient soils,B application can not only increase seed yield,but also improve seed quality of oilseed rape,whereas B application had little effect on grain quality of rice.These results will be helpful to optimize management of B in oilseed rape-rice crop rotation systems in the middle and lower reaches of the Yangtze River.