Influence of Sugarcane Bagasse-derived Biochar Application on Nitrate Leaching in Calcaric Dark Red Soil
Influence of Sugarcane Bagasse-derived Biochar Application on Nitrate Leaching in Calcaric Dark Red Soil
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DOI：
10.2134/jeq2010.0453
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发表时间：
2012-07-01
影响因子：
2.4
通讯作者：
Shinogi, Y.
中科院分区：
文献类型：
--
作者：
Kameyama, K.;Miyamoto, T.;Shinogi, Y.
生物炭的应用已被建议用于提高农业土壤的保水和保肥能力。本研究的目的是评估甘蔗渣炭（甘蔗[umofficinarum L.]甘蔗渣衍生的生物炭）对持水持肥能力较低的岛尻町土硝酸盐（NO3-）淋失的影响。研究了不同热解温度（400-800 ℃）下甘蔗渣炭对NO3-的吸附性能，筛选出最适合吸附NO3-的甘蔗渣炭。硝酸盐能够吸附到在700至800摄氏度的热解温度下形成的甘蔗渣炭上。通过2 mm筛的甘蔗渣炭（在800 ℃下形成）的硝酸盐吸附即使在加入20 mg N L-1 KNO 3溶液后20 h也处于非平衡状态。测量表明，甘蔗渣木炭（800摄氏度）改良土壤的饱和和不饱和导水率受到土壤曲折度和孔隙度变化以及甘蔗渣木炭中孔和微孔存在的影响，这并不有助于土壤水分迁移。在NO3-淋溶研究中，使用不同炭含量（0-10% [w/w]）的甘蔗渣炭（800 ℃）改良土壤，从甘蔗渣炭改良土柱流出物中NO3-的最大浓度比从未改良土柱流出物中的最大浓度低约5%，因为NO3-被甘蔗渣炭（800 ℃）吸附。我们的结论是，甘蔗渣木炭（800摄氏度）的应用程序到土壤中将增加停留时间的NO3-在作物的根区，并提供更多的机会，作物吸收NO3（-）。
Application of biochar has been suggested to improve water- and fertilizer-retaining capacity of agricultural soil. The objective of this study was to evaluate the effects of bagasse charcoal (sugarcane [Saccharum officinarum L.] bagasse-derived biochar) on nitrate (NO3-) leaching from Shimajiri Maji soil, which has low waterand fertilizer-retaining capacity. The nitrate adsorption properties of bagasse charcoal formed at five pyrolysis temperatures (400-800 C) were investigated to select the most suitable bagasse charcoal for NO3- adsorption. Nitrate was able to adsorb onto the bagasse charcoal formed at pyrolysis temperatures of 700 to 800 degrees C. Nitrate adsorption by bagasse charcoal (formed at 800 degrees C) that passed through a 2-mm sieve was in a state of nonequilibrium even at 20 h after the addition of 20 mg N L-1 KNO3 solution. Measurements suggested that the saturated and unsaturated hydraulic conductivity of bagasse charcoal (800 degrees C)-amended soils are affected by changes in soil tortuosity and porosity and the presence of meso-and micropores in the bagasse charcoal, which did not contribute to soil water transfer. In NO3- leaching studies using bagasse charcoal (800 degrees C)-amended soils with different charcoal contents (0-10% [w/w]), the maximum concentration of NO3- in effl uents from bagasse charcoal-amended soil columns was approximately 5% less than that from a nonamended soil column because of NO3- adsorption by bagasse charcoal (800 degrees C). We conclude that application of bagasse charcoal (800 degrees C) to the soil will increase the residence time of NO3- in the root zone of crops and provide greater opportunity for crops to absorb NO3 (-).