黑龙江黑土区设施土壤锌积累特征及风化煤制剂修复研究

Study on Zn Accumulation Characteristics of Greenhouse Soil and Remediation Effects by Weathered Coal Preparation in Black Soil Area of Heilongjiang Province

对黑龙江省黑土区设施土壤中锌(Zn)积累特征进行分析,并进行风化煤制剂修复研究。结果表明:五常、肇东两地部分设施土壤Zn含量超标,五常市属于中等强度变异,肇东市属于弱变异;Zn形态以残渣态为主,弱酸可提取态含量较少,移动性较弱;施用风化煤制剂能显著降低黑土区设施土壤中弱酸可提取态Zn含量(P<0.05),以处理7(风化煤1500 kg/hm^2,复合肥375 kg/hm^2)修复效果最优;相关性分析结果表明,该制剂中风化煤起主导作用。

The Zn accumulation characteristics of greenhouse soil and the remediation effects by weathered coal preparation were studied in black soil area of Heilongjiang province. The results showed that the Zn contents of parts of greenhouse soil exceed standard with moderate intensity variation in Wuchang and weak intensity variation in Zhaodong. The morphology distribution of Zn mainly existed in residua, the weak acid extractable Zn contents were fewer, and the mobility of Zn was weak. The weathered coal preparation reduced the weak acid extractable Zn contents of greenhouse soil in black soil （P〈0.05）. Among all treatments, the remediation effect of treatment 7 （weathered coal 1500 kg/hm^2, compound fertilizer 375 kg/hm^2） was the best. The correlation analysis showed that the weathered coal played an important role in weathered coal preparation.