PDF(Pubmed)
Abstract：
Soil fertility management and crop productivity both are inter-related need extensive attention for sustainability. Industries are being built, which over time produces a lot of effluents containing heavy metal(s), which is then dumped on healthy soils and water bodies. Long-term discharge of lead (Pb)-containing wastewater resulted in significant Pb buildup as well as a decrease in soil biological activity. In this experiment, graded dose of Pb, i.e. 0, 100, 150 and 300 mg/kg and pressmud (PM) (0, 2.5, 5, 10 g/kg) were applied to monitor the Pb toxic effect on soil acid and alkaline phosphatase, dehydrogenase activity. Different treatment combinations were formulated and the experiment was conducted in a completely randomized design (CRD) with three replications. In this experiment, spinach crop was used as a test crop. According to the findings, increased Pb levels in the soil lowered dehydrogenase activity (DHA), acid and alkaline phosphatase. The addition of PM enhanced enzymatic activities by decreasing the labile fraction of Pb in the soil. Incorporation of PM improved the soil enzymatic activities as alkaline phosphatase activity > DHA > acid phosphatase activity in the study. This study suggested that the addition of 10 g/kg PM reduced Pb toxicity (contamination level 300 mg/kg) and improved the soil microbial properties in black soil. These findings are very useful for the remediation of Pb contaminated soil with the help of PM, particularly in peri-urban Pb effluent irrigated areas.
摘要：
土壤肥力管理和作物生产力都是相互关联的，需要对可持续性的广泛关注。工业正在建设中，随着时间的推移会产生大量含有重金属的废水，然后倾倒在健康的土壤和水体上。含铅（Pb）废水的长期排放导致大量的Pb积聚以及土壤生物活性的降低。在这个实验中,Pb的分级剂量，即0、100、150和300mg/kg和Pressmud（PM）（0、2.5、5、10g/kg）用于监测Pb对土壤酸性和碱性磷酸酶的毒性作用，脱氢酶活性。配制不同的治疗组合，并以完全随机设计（CRD）进行实验，重复三次。在这个实验中,菠菜作物被用作试验作物。根据调查结果,土壤中铅水平的增加降低了脱氢酶活性(DHA)，酸性和碱性磷酸酶。PM的添加通过降低土壤中Pb的不稳定分数来增强酶活性。在研究中，掺入PM提高了土壤酶活性，表现为碱性磷酸酶活性>DHA>酸性磷酸酶活性。本研究表明，添加10g/kgPM降低了铅的毒性（污染水平300mg/kg）并改善了黑土中的土壤微生物特性。这些发现对于利用PM修复Pb污染土壤是非常有用的,特别是在城市周边铅污水灌溉区。
