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| 不同热解温度的玉米秸秆生物炭对棕壤反射率的影响 |
| Effects of corn stalk biochar derived at different pyrolysis temperatures on reflectance of brown loam |
| 投稿时间:2025-01-13 |
| DOI:10.13254/j.jare.2025.0031 |
| 中文关键词: 玉米秸秆,生物炭,棕壤土,反照率,土壤含水率 |
| 英文关键词: corn stalk, biochar, brown loam, albedo, soil moisture content |
| 基金项目:国家自然科学基金项目(51766008) |
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| 中文摘要: |
| 生物炭属黑色物质,施入土壤中会加深土壤色度,影响土壤的反射率,从而可能影响土壤温度和能量平衡。本研究在不同热解温度(300、500、700℃)下制得玉米秸秆生物炭CS300、CS500和CS700,采用室内土柱试验,改变生物炭施加比例和土壤含水率来探究生物炭施加对棕壤反射率的影响。结果表明:CS300、CS500和CS700自身对光(220~2 500 nm)的反射率不同,对反射率降低程度依次为CS30020%时,进一步增加水分含量对反射率的影响不明显。当SWC>20%时,施加生物炭后在1 400 nm和1 900 nm处的水特征峰逐渐消失,同一含水率条件下,生物炭施加比例增加会影响土壤孔隙结构从而降低棕壤反射率。不同热解温度玉米秸秆生物炭亦会降低棕壤反照率,其效应受热解温度、施加量及土壤含水率调控。 |
| 英文摘要: |
| Biochar, a carbon-rich black substance, can influence soil reflectance upon its incorporation into the soil, thereby potentially affecting soil temperature, chroma and energy balance. In this study, corn straw biochar CS300, CS500 and CS700 were prepared at different pyrolysis temperatures(300, 500 ℃, and 700 ℃). An indoor column experiment was conducted to manipulate the proportion of biochar added alongside different levels of soil moisture content in order to explore how these factors affect soil reflectance. The findings revealed that the reflectance of CS300, CS500, and CS700 varied significantly; their ability to reduce reflectance followed the order:CS300 |
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