Two types of biochars: one made from sugarcane bagasse, other one produced from paper fiber sludge and grain husks and their effects on water retention of a clay, a loamy soil and a silica sand
Two types of biochars: one made from sugarcane bagasse, other one produced from paper fiber sludge and grain husks and their effects on water retention of a clay, a loamy soil and a silica sand
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DOI：
10.17221/15/2018-swr
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发表时间：
2019-04
影响因子：
2.685
通讯作者：
Hana Hlaváčiková;V. Novák;K. Kameyama;K. Brezianska;M. Rodný;J. Vitková
中科院分区：
文献类型：
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作者：
Hana Hlaváčiková;V. Novák;K. Kameyama;K. Brezianska;M. Rodný;J. Vitková
生物炭（BC）用作土壤改良剂，主要通过改善土壤化学和水物理性质来促进植物生长。在这项工作中，分析了两种类型的BC对土壤保水性能的影响。第一种 BC 是由甘蔗渣制成的。将其以 3 w% 的施用量添加到粘土“Shimajiri Maji”土壤中。第二种类型的BC是由造纸纤维污泥和谷壳制成的。它以 3.6 和 7.3 w% 的比例添加到壤土中。据推测，BC 改良剂的效果在粗粒土壤中比在细粒土壤中更明显。因此，与壤土相比，第二种类型的BC被额外施用在硅砂中，作为有纹理的对比材料。 BC修正导致粘土的传输孔隙、壤土的储存孔隙以及硅砂的大孔隙和储存孔隙中的含水量在统计学上显着增加。尽管对土壤保水有积极影响，但仅在具有较大BC修正率的壤土中才发现可用水容量（AWC）显着增加。讨论了可能的原因。
Biochar (BC) is used as a soil amendment to enhance plant growth by improving mainly soil chemical and hydrophysical properties. In this work the effects of two types of BCs on soil water retention properties were analysed. The first type of BC was made from sugarcane bagasse. It was added to a clay “Shimajiri Maji” soil at an application rate of 3 w%. The second type of BC was made from paper fiber sludge and grain husks. It was added into a loam soil at rates of 3.6, and 7.3 w%. It was assumed that the effect of BC amendment will be more pronounced in coarse-grained soil than in fine-grained one. Therefore, the second type of BC was applied additionally in the silica sand, in a textured contrast material compared with the loam soil. The BC amendment caused statistically significant increase of water content in the transmission pores of the clay soil, in the storage pores of the loam soil, and in the macropores and the storage pores in the silica sand. Despite of the positive effect on soil water retention, statistically significant increase of available water capacity (AWC) was identified only in the loam soil with the larger BC amendment rate. Possible reasons are discussed.