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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Pine oleoresin: a potential urease inhibitor and coating material for slow-release urea
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Pine oleoresin: a potential urease inhibitor and coating material for slow-release urea

机译：松脂树脂：潜在的脲酶抑制剂和缓释尿素的包衣材料

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In the recent past several attempts were made to increase N use efficiency of urea through coating. In this communication, an attempt has been made to coat urea with pine oleoresin to enhance its N use efficiency. Pine oleoresin is a gum-like substance extracted from pine trees. The crude resin is composed of levopimaric, palustric, I-abietic and neoabietic acids in different proportions. All these acids have antibacterial and antifungal properties. Pine oleoresin acts as a physical barrier around the urea granules thereby reducing the release of N from coated urea; it inhibits urease activity through antibacterial properties, and being acidic in nature, it inhibits volatilization loss by reducing alkaline microsites. A protocol has been developed to coat urea with oleoresin and the coated urea contained 3.82-4.36% pine oleoresin and 44.07-44.31% N. Irrespective of the soil type, urease activity decreased considerably in the pine oleoresin-treated soils compared to control due to acidic and antimicrobial properties of pine oleoresin. The amount of urea extracted at different times from Vertisols fitted to a first-order kinetic equation showed that time required for hydrolysis of 90% of the applied urea markedly increased from 88.56 to 328.94 h in the presence of pine oleoresin. This indicates that pine oleoresin is a potential urease inhibitor. The volatilization loss of pine oleoresin-coated urea from a Vertisol decreased from 16.99% to 10.12% after 240 h. Thus, pine oleoresin-coated urea can be a better substitute for neem-coated urea.
机译：在最近的过去中，已经进行了一些尝试以通过涂层提高尿素的氮利用效率。在这种交流中，已经尝试用松脂油树脂涂覆尿素以提高其氮利用效率。松脂树脂是从松树中提取的树胶状物质。粗树脂由不同比例的左旋海马酸，palustric酸，I-松香酸和新松香酸组成。所有这些酸都具有抗菌和抗真菌特性。松脂树脂作为尿素颗粒周围的物理屏障，从而减少了氮从包膜尿素中的释放。它通过抗菌作用抑制脲酶活性，并且本质上是酸性的，它通过减少碱性微位点来抑制挥发损失。已经开发出用油性树脂涂覆尿素的方案，并且涂覆的尿素包含3.82-4.36％的松树油树脂和44.07-44.31％的氮。无论土壤类型如何，与对照相比，在松油树脂处理的土壤中脲酶活性均显着下降，原因是松油树脂的酸性和抗菌特性。在不同时间从Vertisols拟合一级动力学方程式提取的尿素数量表明，在松油树脂的存在下，水解90％施用的尿素所需的时间从88.56 h显着增加至328.94 h。这表明松树油树脂是潜在的脲酶抑制剂。 240小时后，松脂中松油树脂松香的挥发损失从16.99％降低到10.12％。因此，松脂树脂涂层的尿素可以更好地替代印em涂层的尿素。

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