• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>American Journal of Experimental Agriculture >Contamination of Lettuce Plants Irrigated with Waste Water in Yaounde, Cameroon
【24h】

Contamination of Lettuce Plants Irrigated with Waste Water in Yaounde, Cameroon

机译：喀麦隆雅温得的废水灌溉的生菜植物受到污染

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Aims: To evaluate the effects of various treatment combinations of water contaminated with faecal sludge on the growth and microbiological characteristics of lettuce ( Lactuca sativa L.) cultivated around the river Avo'o discharged zone. Study Design: We used randomized plots in which young lettuce plants obtained from a nursery were planted in four sites (S0, S1, S2 and S3) situated 3000, 810, 100 and 350 m from the raw discharge area along river Avo'o. Place and Duration: Field studies were carried out in Nomayos (Yaounde) during the 2009-2010 growing seasons while laboratory analysis were effected at the waste water research unit of the Department of Plant Biology at the University of Yaounde I. Methodology: Faecal streptococci, faecal coliforms and parasitic characteristics were determined in raw discharged sludge from river Avo’o water samples collected at three different points (P1, P2, P3) and in lettuce using standard protocols. Growth parameters of the lettuce plants were also evaluated. Results: Faecal sludge, water from river Avo'o and L. sativa showed high levels of bacteriological and parasitological pollutants. The results also revealed high concentrations of faecal coliforms and faecal streptococci (6092 and 3390 CFU/100 ml respectively), and helminth eggs (> 273 eggs / L) in water. Treatment 3 (S3) showed the largest number of leaves with an average of 34.63 leaves in the ninth week for site 1 and 40.33 leaves for site 2. Plant height increased gradually with time and treatments. The mean values of leaf surfaces obtained after nine weeks were 11.5 cm2 and 13.99 cm2 for treatment S3 in sites 1 and 2 respectively. Conclusion: Though the best growth of lettuce was observed in plots irrigated with water from river Avo’o, the high levels of parasite concentrations on their leaves (43 eggs/100 g) highlight the necessity for a better management of faecal sludge in Yaounde city.
机译：目的：评估粪便污泥污染水的各种处理组合对Avo'o河排放带周围种植的生菜（Lactuca sativa L.）生长和微生物特性的影响。研究设计：我们使用随机样地，将从苗圃中获得的年轻生菜植物种植在四个位置（S0，S1，S2和S3），分别位于沿Avo'o河原始排放区3000、810、100和350 m的位置。地点和时间：在2009-2010年生长季节的Nomayos（雅温得）进行了实地研究，同时在雅温得第一大学植物生物学系的废水研究部门进行了实验室分析。方法：粪便链球菌，使用标准方法，在三个不同点（P1，P2，P3）和生菜中采集的阿沃河水样中的原始排放污泥中测定了粪大肠菌群和寄生虫特性。还评估了莴苣植物的生长参数。结果：粪便污泥，Avo'o河和苜蓿的水显示出高水平的细菌和寄生虫污染物。结果还显示水中高浓度的粪便大肠菌和粪链球菌（分别为6092和3390 CFU / 100 ml）和蠕虫卵（> 273卵/ L）。处理3（S3）显示出最大数量的叶片，在第9周，部位1的平均叶片数为34.63片，部位2的平均叶片数为40.33片。随着时间和处理的进行，株高逐渐增加。 9周后处理S3在位置1和2处获得的叶片表面平均值分别为11.5 cm2和13.99 cm2。结论：尽管在Avo'o河灌溉的水域中观察到莴苣的最佳生长，但其叶子上高水平的寄生虫浓度（43卵/ 100克）突显了雅温得市更好地处理粪便污泥的必要性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号