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首页> 外文期刊>International Soil and Water Conservation Research >Effects of rice husk biochar on selected soil properties and nitrate leaching in loamy sand and clay soil
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Effects of rice husk biochar on selected soil properties and nitrate leaching in loamy sand and clay soil

机译：稻壳生物炭对壤土和粘土土性状和硝态氮淋溶的影响。

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Biochar is a product of pyrolysis of biomass in the absence of oxygen and has a high potential to sequester carbon into more stable soil organic carbon (OC). Despite the large number of studies on biochar and soil properties, few studies have investigated the effects of biochar in contrasting soils. The current research was conducted to evaluate the effects of different biochar levels (0 (as control), 1% and 3%) on several soil physiochemical properties and nitrate leaching in two soil types (loamy sand and clay) under greenhouse conditions and wet-dry cycles. The experiment was performed using a randomized design with three levels of biochar produced from rice husks at 500?°C in three replications. Cation exchange capacity increased significantly, by 20% and 30% in 1% and 3% biochar-amended loamy sand soil, respectively, and increases were 9% and 19% in 1% and 3% biochar-amended clay soil, respectively. Loamy sand soil did not show improvement in aggregate indices, including mean weight diameter, geometric mean diameter, water stable aggregates and fractal dimension, which was contrary to the results for the clay soil. Rice husk biochar application at the both rates decreased nitrate leaching in the clay soil more than in the loamy sand. Our study highlights the importance of soil type in determining the value of biochar as a soil amendment to improve soil properties, particularly soil aggregation and reduced nitrate leaching. The benefits of the biochar in the clay soil were greater than in the loamy sand soil.
机译：生物炭是在没有氧气的情况下生物质热解的产物，具有将碳螯合到更稳定的土壤有机碳（OC）中的潜力。尽管对生物炭和土壤特性进行了大量研究，但很少有研究调查生物炭在对比土壤中的作用。目前的研究旨在评估不同生物炭水平（0（作为对照），1％和3％）对在温室条件和湿润条件下两种土壤类型（壤土和粘土）中几种土壤理化特性和硝酸盐淋失的影响。干循环。实验是采用随机设计进行的，在500℃时，从稻壳中产生了三个水平的生物炭，重复三次。阳离子交换能力显着提高，在1％和3％的生物炭改性的壤土中分别增加了20％和30％，在1％和3％的生物炭改性的黏土中，阳离子交换量分别增加了9％和19％。壤质砂土的骨料指数没有改善，包括平均重量直径，几何平均直径，水稳性骨料和分形维数，这与黏土的结果相反。两种情况下稻壳生物炭的施用比在壤土沙土中减少的硝态氮在粘土中的浸出更多。我们的研究强调了土壤类型在确定生物炭作为土壤改良剂以改善土壤特性（尤其是土壤聚集和减少硝酸盐淋失）的价值方面的重要性。生物炭在粘土土壤中的收益大于在壤质砂土中。

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