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Development and Testing of Improved Efficiency Boron-Enriched Diammonium Phosphate Fertilizers
Journal of Soil Science and Plant Nutrition ( IF 3.9 ) Pub Date : 2021-02-09 , DOI: 10.1007/s42729-021-00428-w
Tayyaba Samreen , Fien Degryse , Roslyn Baird , Rodrigo Coqui da Silva , Zahir Ahmad Zahir , Muhammad Zulqernain Nazir , Abdul Wakeel , Sidra-Tul-Muntaha , Michael McLaughlin

The application of boron (B) fertilizers is challenging due to the high solubility of commonly used B compounds, the small requirement by crops, and the narrow range between toxicity and deficiency levels for plants. The application of a B-only fertilizer without a macronutrient carrier is inefficient due to the high cost of double handling and the poor distribution of the micronutrient in the field. An improved efficiency B fertilizer is proposed using a wax- or elemental sulfur (ES)–coated core of granulated colemanite within a pellet composed of diammonium phosphate (DAP). We assessed the dissolution rate, release in soil, and crop uptake in two consecutive crops under simulated leaching conditions. The fertilizers with the wax- or ES-coated colemanite core showed a much slower release of B compared to DAP pelleted with borax or uncoated colemanite. A soil incubation experiment showed initially elevated extractable B concentrations (> 5 mg kg−1) around the fertilizer with the uncoated B powders. The coated fertilizers showed a more gradual release of B, with 32–38% of the B still in the pellets 8 weeks after application to soil. In plant growth experiments, 24–37% of the added B was lost in leachates for the uncoated products compared to only 1–2% for the coated products which resulted in higher B uptake and higher yield for coated fertilizers. We infer from the results that these novel compound fertilizers released B at a rate slow enough to prevent large leaching losses of B but fast enough to meet plant B demand.



中文翻译:

高效硼富磷酸二铵肥料的开发与试验

由于常用的B类化合物的溶解度高,对作物的需求少以及植物的毒性和缺乏水平之间的范围狭窄,因此硼(B)肥料的使用具有挑战性。由于双重处理的高成本和微量营养素在田间的分配不畅,仅使用不含大量营养素载体的仅B的肥料效率低下。有人提出了一种改进的效率B肥,它是在由磷酸氢二铵(DAP)组成的颗粒内使用蜡状或元素硫(ES)包衣的粒状硬锰矿芯。我们在模拟浸出条件下评估了两个连续农作物的溶出度,在土壤中的释放和农作物的吸收。与用硼砂或未涂覆的硬锰矿造粒的DAP相比,带有蜡或ES涂层的硬锰矿芯的肥料显示出的B释放要慢得多。土壤培养实验表明,最初可提取的B浓度升高(> 5 mg kg-1)在肥料周围未涂覆的B粉末。包膜肥料显示出更逐渐释放的B,在施入土壤8周后,仍有32-38%的B留在颗粒中。在植物生长实验中,未包衣产品的渗滤液中损失了24%至37%的硼,相比之下,包衣产品只有1-2%的硼流失,这导致包膜肥料吸收更高的B和更高的产量。我们从结果中推断,这些新型复合肥料释放B的速率足够慢,以防止B的大量浸出损失,但足够快,可以满足植物B的需求。

更新日期:2021-02-09
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