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采用土柱培养的试验方法,设置农药草铵膦污染水平(0、0.06和0.59 g/kg)和生物炭添加水平(0、0.028、0.056、0.112 kg/kg)共12个处理,研究了农药、生物炭对干旱区农田风沙土土壤呼吸的影响。结果表明,与对照相比,草铵膦显著促进土壤呼吸(P<0.05),但不同污染水平土壤呼吸无显著差异(P>0.05)。不同生物炭添加量对土壤呼吸影响不同,与对照相比,0.028、0.056 kg/kg生物炭水平对土壤呼吸无显著影响(P>0.05),0.112 kg/kg生物炭水平显著抑制土壤呼吸(P<0.05);添加生物炭后缓解了草铵膦对土壤微生物的影响,不同水平草铵膦污染土壤中,0.112、0.056 kg/kg生物炭添加水平土壤呼吸均高于0.028 kg/kg水平。适量生物炭添加可降低草铵膦对土壤呼吸的影响,减少土壤碳排放。
Abstract：To study the effects of glufosinate ammonium on soil respiration under different biochar application in farmland soil in arid regions. The soil column culture test method was used to set the levels of pesticide glufosinate(0, 0.06, and 0.59 g/kg) and biochar addition levels(0, 0.028,0.056,and 0.112 kg/kg). The results were as follows:glufosinate-ammonium pollution had a significant promotion effect on soil respiration(P<0.05),but there was no significant difference found in soil respiration(P>0.05). Different biochar treatments had different effects on soil respiration. Compared with the control,0.028 and 0.056 kg/kg biochar treatment showed no significant effects on soil respiration(P>0.05),while 0.112 kg/kg biochar treatment showed an inhibitory trend(P<0.05). The addition of biochar alleviated the effects of glufosinate on soil microbes. The 0.112 and 0.056 kg/kg biochar treatments were higher than 0.028 kg/kg biochar treatment under different glufosinate contamination levels.Therefore,the addition of appropriate amount of biochar can reduce the effect of soil glufosinate on soil respiration and decrease soil carbon emission.
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基本信息:
中图分类号:X53
引用信息:
[1]蒋靖佰伦,杨再磊,马雯琪,等.生物炭对草铵膦污染农田土壤呼吸的影响[J].新疆农业大学学报,2019,42(06):444-450.
基金信息:
新疆维吾尔自治区自然科学基金项目(2018D01B25)
2019-11-15
2019-11-15