改性磷酸一铵(MAP)肥料中磷和氮的利用率

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Jonathan W. McLachlan, Peter W. English, R. Flavel, C. Guppy
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引用次数: 0

摘要

调节养分释放,使其更符合植物的需求,可以提高养分利用效率。形成溶解度较低的铵盐可能是减缓肥料氮(N)释放的一种简单而经济有效的方法。通过在普通磷酸一铵(MAP)肥料中添加硅酸镁并重组颗粒,制备了几种改性磷酸一铵(MAP)肥料化合物。这一过程会形成菱镁矿,有可能减缓氮和磷酸盐向土壤溶液的释放。与标准 MAP 肥料相比,这些改良 MAP 肥料化合物含有更多柠檬酸盐可溶性氮和磷。这些肥料化合物被添加到对磷有反应的土壤中,大麦植株生长了 5 周,以研究大麦产量对改良 MAP 肥料化合物养分供应的反应。此外,还使用反向稀释追踪技术比较了改良 MAP 肥料化合物与普通 MAP 肥料的肥料溶解度和钾的可用性。大麦(Hordeum vulgare)植株在对钾有反应的土壤中生长 5 周后,对钾的回收率相同且高效,这表明肥料化合物的可溶性足以满足植物的需求,而且磷酸盐的释放并没有因为钙钛矿的形成而减慢。然而,与标准 MAP 肥料相比,使用改良 MAP 肥料化合物种植的大麦植株的产量普遍较低。生长量降低的原因可能是氮的释放速度减慢,从而降低了氮的可用性,因此有必要开展进一步研究,以确定这些产品在提高氮利用效率方面的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Availability of phosphorus and nitrogen from modified mono-ammonium phosphate (MAP) fertiliser compounds
Moderating nutrient release to match plant requirements more closely can improve nutrient use efficiency. The formation of lower-solubility ammonium salts may be a simple and cost-effective way to slow the release of nitrogen (N) from fertiliser sources. Several modified mono-ammonium phosphate (MAP) fertiliser compounds were prepared by adding magnesium silicate to regular MAP fertiliser and reconstituting the granules. This process results in the formation of schertelite that may potentially slow the release of both N and phosphate to soil solution. These modified MAP fertiliser compounds include more citrate-soluble N and phosphorus (P) than standard MAP fertiliser. The fertiliser compounds were added to a P-responsive soil and barley plants were grown for 5 weeks to investigate shoot yield responses to nutrient availability of the modified MAP fertiliser compounds. Reverse dilution tracing techniques were also used to compare the fertiliser solubility and P availability of the modified MAP fertiliser compounds with regular MAP fertiliser. Barley (Hordeum vulgare) plants recovered P equally and efficiently over 5 weeks of growth in the P-responsive soil, suggesting that the fertiliser compounds were sufficiently soluble to meet plant requirements and that phosphate release was not slowed by the formation of schertelite. However, shoot yields were generally lower when the barley plants were grown with the modified MAP fertiliser compounds compared to standard MAP fertiliser. This reduced growth was likely due to decreased N availability through a slower release of N, thus further research is warranted to determine the potential for these products to improve N use efficiency.
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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