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首页> 美国卫生研究院文献>Scientific Reports >Impacts of simulated erosion and soil amendments on greenhouse gas fluxes and maize yield in Miamian soil of central Ohio
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Impacts of simulated erosion and soil amendments on greenhouse gas fluxes and maize yield in Miamian soil of central Ohio

机译：模拟侵蚀和土壤改良剂对俄亥俄中部迈阿密河土壤温室气体通量和玉米产量的影响

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Erosion-induced topsoil loss is a threat to sustainable productivity. Topsoil removal from, or added to, the existing surface is an efficient technique to simulate on-site soil erosion and deposition. A 15-year simulated erosion was conducted at Waterman Farm of Ohio State University to assess impacts of topsoil depth on greenhouse gas (GHG) emissions and maize yield. Three topsoil treatments were investigated: 20 cm topsoil removal, 20 cm topsoil addition, and undisturbed control. Results show that the average global warming potential (GWP) (Mg CO2 Eq ha−1 growing season−1) from the topsoil removal plot (18.07) exhibited roughly the same value as that from the undisturbed control plot (18.11), but declined evidently from the topsoil addition plot (10.58). Maize yield decreased by 51% at the topsoil removal plot, while increased by 47% at the topsoil addition plot, when compared with the undisturbed control (7.45 Mg ha−1). The average GWP of erosion-deposition process was 21% lower than that of the undisturbed control, but that greenhouse gas intensity (GHGI) was 22% higher due to lower yields from the topsoil removal plot. Organic manure application enhanced GWP by 15%, and promoted maize yield by 18%, but brought a small reduction GHGI (3%) against the N-fertilizer application.
机译：侵蚀引起的表土流失是对可持续生产力的威胁。从现有表面去除或添加到现有表面的表土是模拟现场土壤侵蚀和沉积的有效技术。在俄亥俄州立大学沃特曼农场进行了15年的模拟侵蚀，以评估表土深度对温室气体（GHG）排放和玉米产量的影响。研究了三种表层土壤处理方法：去除20？cm表土，添加20？cm表土和不受干扰的控制。结果表明，表层土壤清除区（18.07）的平均全球变暖潜势（GWP）（Mg CO2 Eq ha -1 生长季节 -1 ）表现出大致相同的值与不受干扰的对照图（18.11）相同，但与表土添加图（10.58）相比明显下降。与未扰动对照（7.45 Mg ha -1 ）相比，在表土去除区玉米产量降低了51％，而在表土添加区玉米产量提高了47％。侵蚀沉积过程的平均全球升温潜能值比未扰动对照低21％，但由于从表层土壤清除区获得的单产较低，温室气体强度（GHGI）提高了22％。有机肥料的施用使全球升温潜能值提高了15％，玉米产量提高了18％，但与氮肥施用相比，GHGI的降低量很小（3％）。

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