Effect of Biochar Application on

Abstract

为确定生物炭作为土壤改良剂对半干旱地区土壤持水性能的影响,以中国科学院固原生态试验站为研究基地,通过添加不同种类(锯末、槐树皮)、不同比例(1%,3%,5%,以干土质量计)生物炭的小区定位试验,研究生物炭添加6个月后表层土壤容重、田间持水量及持水性能的变化。结果表明:施入生物炭可以有效地改善土壤容重,提高土壤田间持水量和土壤的导水性能。其中槐树皮生物炭的作用效果优于锯末生物炭,且土壤的持水性能与生物炭掺量呈正相关关系。 更多还原Abstract:A field experiment based on the long-term in-situ experiments at Guyuan Ecological ExperimentalStation of Chinese Academy of Sciences was conducted to investigate the biochar amendment on waterholding capacity in the southern region of Ningxia.The treatment included two kinds of biochars(sawdust,locust tree skin)and different addition ratio(1%,3%,5%).After six months,the soil bulk density,fieldcapacity,soil water retention and saturated hydraulic conductivity were tested.The results indicated that:Biochar addition could significantly decrease soil bulk density,improve field capacity and holding capacity.The effect of locust tree skin biochar was better than sawdust biochar,and soil holding water performanceshowed a positive correlation with the dosage of biochar

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