| 绿地再生水灌溉土壤微生物量碳及酶活性效应研究 |
| 摘要点击 3442 全文点击 1499 投稿时间：2012-04-17 修订日期：2012-07-09 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 再生水 灌溉 绿地 土壤酶活性 微生物量碳 |
| 英文关键词 reclaimed water irrigation green space soil enzyme activities microbial biomass carbon |
|
| 中文摘要 |
| 再生水灌溉引起了土壤理化性质的变化,其对土壤生物活性的影响备受关注. 以再生水利用较典型的北京为研究区, 分层采集了不同再生水灌溉历史的城区公园绿地与城郊农田表层土壤样品,测定并分析了一些常规理化指标、土壤微生物量碳及 5种土壤酶(脲酶、碱性磷酸酶、蔗糖酶、脱氢酶和过氧化氢酶)活性,探讨长期再生水灌溉下土壤微生物量碳和酶活性的变化. 结果表明,再生水灌溉下公园绿地土壤微生物量碳和酶活性均高于其自来水对照灌区,农田上升不明显. 与对照相比,公园绿地与农田再生水灌区 0~20 cm土层土壤 微生物量碳平均含量分别上升了 60.1%和14.2%, 公园绿地再生水灌区0~20 cm土层中土壤 酶活性平均增幅为36.7%,而农田为7.4%. 调查区土壤微生物量碳及酶活性均随土壤深度的增加而降低,其中公园绿地 0~10 cm与10~20 cm土层间差异极显著. 因此,北京地区城市绿地使用再生水长期灌溉有助于提高土壤生物活性. |
| 英文摘要 |
| The physicochemical properties of soils might be changed under the long-term reclaimed water irrigation. Its effects on soil biological activities have received great attentions. We collected surface soil samples from urban green spaces and suburban farmlands of Beijing. Soil microbial biomass carbon (SMBC), five types of soil enzyme activities (urease, alkaline phosphatase, invertase, dehydrogenase and catalase) and physicochemical indicators in soils were measured subsequently. SMBC and enzyme activities from green land soils irrigated with reclaimed water were higher than that of control treatments using drinking water, but the difference is not significant in farmland. The SMBC increased by 60.1% and 14.2% than those control treatments in 0-20 cm soil layer of green land and farmland, respectively. Compared with their respective controls, the activities of enzymes in 0-20 cm soil layer of green land and farmland were enhanced by an average of 36.7% and 7.4%, respectively. Investigation of SMBC and enzyme activities decreased with increasing of soil depth. Significantly difference was found between 0-10 cm and 10-20 cm soil layer in green land. Soil biological activities were improved with long-term reclaimed water irrigation in Beijing. |
|
|
|
