Polymeric-Coated Monoammonium Phosphate with Different Release Profiles for Improving Phosphorus Use Efficiency in Forage Production

IF 2.3 Q1 AGRICULTURE, MULTIDISCIPLINARY ACS agricultural science & technology Pub Date : 2023-12-28 DOI:10.1021/acsagscitech.3c00412
Cibeli L. Costa, Ricardo Bortoletto-Santos, Milene C. Mitsuyuki, Caue Ribeiro, Alberto Bernardi and Ana Rita A. Nogueira*, 
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Abstract

As one of the essential nutrients plants need to grow, phosphorus presents the drawback of immobilizing in high-Fe and Al soils. Therefore, it is necessary to properly manage P-containing fertilizers to optimize the crop nutrient amount and synchronize their plant uptake with the release of nutritional composition. Coated fertilizers can improve the availability of nutrients by reducing losses due to fixation or leaching. The present study investigated the effects of monoammonium phosphate (MAP) granules coated with a green and biodegradable castor oil-based polyurethane layer film (2 to 8% by weight) on plant development and P absorption. A greenhouse experiment with two crops as the test plants was performed. The study found a well-adjusted nutrition profile in both cultures with a continuous nutrient supply when mixing the different MAP-coated granules. Combining particles with different release rates can balance the slow-release effect of coating and nutrient absorption by plants, thereby allowing for a continuous nutrient supply from a single fertilization. Our results can support the design of more efficient controlled-released systems, providing a new approach to reducing the application and increasing the efficiency of phosphorus fertilizer. The presence of a coating improves the nutrient absorption of plants. At the same time, the coating used has good biocompatibility.

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具有不同释放曲线的聚合物包衣磷酸一铵用于提高牧草生产中的磷利用效率
作为植物生长所需的基本养分之一,磷在高铁和高铝土壤中存在固定化的缺点。因此,有必要对含磷肥料进行适当管理,以优化作物养分含量,并使植物对磷的吸收与营养成分的释放同步。涂层肥料可以减少因固定或沥滤造成的损失,从而提高养分的可用性。本研究调查了磷酸一铵(MAP)颗粒包覆绿色、可生物降解的蓖麻油基聚氨酯层膜(2% 至 8%(重量百分比))对植物生长和磷吸收的影响。以两种作物为试验植物进行了温室试验。研究发现,在混合不同的 MAP 涂层颗粒时,两种培养物的营养状况都得到了很好的调整,养分供应持续不断。将不同释放速率的颗粒组合在一起,可以平衡包衣的缓释效果和植物对养分的吸收,从而实现一次施肥的持续养分供应。我们的研究结果有助于设计更高效的控释系统,为减少磷肥施用量和提高磷肥效率提供了一种新方法。涂层的存在提高了植物对养分的吸收。同时,所使用的涂层具有良好的生物相容性。
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