Enhanced-Efficiency Urea Coated with Ground Phosphate Rock Powder, Inhibitor and Epoxy Resin: Preparation and Effects on Soil Nitrogen Supply Capacity, Wheat Yield and Nitrogen Use Efficiency

IF 1.4 4区农林科学 Q4 SOIL SCIENCE Eurasian Soil Science Pub Date : 2024-04-10 DOI:10.1134/s1064229323603670

Yaru Ge, Maoying Wang, Yuanjie Dong, Xinglong Dai, Mingrong He

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Abstract

A develop a new environmentally friendly controlled-release urea to improve soil nitrogen supply capacity, wheat yield and nitrogen use efficiency, six coated urea were prepared in this study: resin-coated urea; phosphate rock powder-coated urea; phosphate rock powder and epoxy resin-coated urea; urease and nitrification inhibitors combined with epoxy resin-coated urea; urease and nitrification inhibitors combined with phosphate rock-coated urea; and urease and nitrification inhibitors combined with phosphate rock and epoxy resin-coated urea (RPHDU). Scanning electron microscopy and hydrostatic release tests were used to evaluate the microstructure and controlled-release properties of different urea. Using zero nitrogen treatment and conventional urea treatment as controls, six self-made coated urea were used for different fertilization treatments, with a total of eight treatments set up for ammonia volatilization test and field experiment to study the effects of different fertilization treatments on ammonia volatilization, soil nitrogen supply capacity, wheat yield, and nitrogen use efficiency. The results showed that the RPHDU coating had a complete and tight membrane shell. RPHDU had controlled-release periods for nitrogen, hydroquinone, and dicyandiamide (cumulative nutrient release > 80%) of 112, 56, and 28 days, respectively, effectively controlling the release of nutrients and inhibitors. The treatments of adding inhibitors delayed the ammonia volatilization peak and reduced the peak value, with the RPHDU treatment having the lowest cumulative ammonia volatilization. During the critical growth period of wheat, the soil available nitrogen content in the RPHDU treatment was higher than in other treatments, which brought soil nutrient supply closer to wheat demand. Moreover, the soil apparent nitrification rate was lower in the RPHDU treatment than in other treatments throughout the entire wheat growth cycle, reducing the risk of nitrate nitrogen leaching. The RPHDU treatment achieved the highest wheat yield and nitrogen use efficiency, which were significantly increased by 21 and 21%, respectively, compared to the U treatment. In summary, RPHDU could more effectively control nutrient release, improve soil nitrogen supply capacity, reduce soil nitrogen loss, and increase wheat yield and nitrogen use efficiency. The results of this study may provide a basis for the development of novel and environmentally friendly fertilizers.

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磷矿粉、抑制剂和环氧树脂包裹的高效尿素：制备方法及其对土壤供氮能力、小麦产量和氮利用效率的影响

摘要为开发一种新型环境友好型控释尿素，提高土壤供氮能力、小麦产量和氮素利用效率，本研究制备了六种包膜尿素：树脂包膜尿素；磷矿石粉包膜尿素；磷矿石粉和环氧树脂包膜尿素；脲酶和硝化抑制剂与环氧树脂包膜尿素；脲酶和硝化抑制剂与磷矿石包膜尿素；脲酶和硝化抑制剂与磷矿石和环氧树脂包膜尿素（RPHDU）。扫描电子显微镜和静水释放试验用于评估不同尿素的微观结构和控释特性。以零氮处理和常规尿素处理为对照，采用6种自制包膜尿素进行不同施肥处理，共设置8个处理进行氨挥发试验和田间试验，研究不同施肥处理对氨挥发、土壤氮素供应能力、小麦产量和氮素利用效率的影响。结果表明，RPHDU 涂层具有完整、紧密的膜壳。RPHDU对氮、对苯二酚和双氰胺的控释期（累积养分释放> 80%）分别为112天、56天和28天，有效控制了养分和抑制剂的释放。添加抑制剂的处理推迟了氨挥发峰值并降低了峰值，其中 RPHDU 处理的氨累积挥发量最低。在小麦生长关键期，RPHDU 处理的土壤可利用氮含量高于其他处理，使土壤养分供应更接近小麦需求。此外，在整个小麦生长周期中，RPHDU 处理的土壤表观硝化率低于其他处理，降低了硝态氮淋失的风险。RPHDU 处理的小麦产量和氮素利用效率最高，与 U 处理相比，分别显著提高了 21% 和 21%。总之，RPHDU 能更有效地控制养分释放，提高土壤氮素供应能力，减少土壤氮素流失，提高小麦产量和氮素利用效率。该研究结果可为新型环保肥料的开发提供依据。

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来源期刊

Eurasian Soil Science 农林科学-土壤科学

CiteScore

2.70

自引率

35.70%

发文量

137

审稿时长

12-24 weeks

期刊介绍： Eurasian Soil Science publishes original research papers on global and regional studies discussing both theoretical and experimental problems of genesis, geography, physics, chemistry, biology, fertility, management, conservation, and remediation of soils. Special sections are devoted to current news in the life of the International and Russian soil science societies and to the history of soil sciences. Since 2000, the journal Agricultural Chemistry, the English version of the journal of the Russian Academy of Sciences Agrokhimiya, has been merged into the journal Eurasian Soil Science and is no longer published as a separate title.