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Effect of Pyrochar and Hydrochar on Water Evaporation in Clayey Soil under Greenhouse Cultivation

文献类型： 外文期刊

作者： Liu, Yang 1 ; Liu, Xiaoyu 2 ; Ren, Ni 1 ; Feng, Yanfang 2 ; Xue, Lihong 2 ; Yang, Linzhang 2 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Informat, Res Ctr IoT Agr Applicat, Nanjing 210014, Jiangsu, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Minist Agr & Rural Affairs, Key Lab Agroenvironm Downstream Yangtze Plain, Nanjing 210014, Jiangsu, Peoples R China

3.Jiangsu Vocat Coll Agr & Forestry, Jurong 212400, Peoples R China

4.Univ Massachusetts, Stockbridge Sch Agr, Amherst, MA 01003 USA

5.Jiangsu Univ, Sch Environm & Safety Engn, Zhenjiang 212001, Jiangsu, Peoples R China

关键词： soil evaporation; hydrochar; pyrochar; greenhouse cultivation; clayey soil

期刊名称：INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH （ 影响因子：3.39； 五年影响因子：3.789 ）

ISSN：

年卷期： 2019 年 16 卷 14 期

页码：

收录情况： SCI

摘要： Greenhouse cultivation consumes large volumes of freshwater, and excessive irrigation induces environmental problems, such as nutrient leaching and secondary salinization. Pyrochar (biochar from high-temperature pyrolysis) is an effective soil amendment, and researches have shown that pyrochar application could maintain soil nutrient and enhance carbon sequestration. In addition to pyrochar from pyrolysis, hydrochar from hydrothermic carbonization is considered as a new type of biochar and has the advantages of low energy consumption and a high productive rate. However, the effect of these two biochars on water evaporation in clayey soils under a greenhouse system has seldom been studied. The relationship between water evaporation and biochar properties is still unknown. Thus, in the present study, water evaporation under pyrochar and hydrochar application were recorded. Results showed that both pyrochar and hydrochar application could inhibit water evaporation in clayey soil under greenhouse cultivation. Pyrochar showed a better inhibition effect compared with hydrochar. Correlation analysis indicated that the water evaporation rate was significantly positively correlated with bulk density of biochar (p < 0.05). Overall, application of pyrochar or hydrochar could both reduce soil bulk density and inhibit soil evaporation, and be available for greenhouse cultivation. However, the inhibition effect depends on the properties of the biochar.

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