Sludge as an initial nutrient driver for yield improvement in the poor soils of northern Namibia

IF 1.1 Q3 AGRONOMY

South African Journal of Plant and Soil Pub Date : 2022-10-20 DOI:10.1080/02571862.2022.2119291

E. Ebrahimi, J. Zinkernagel

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引用次数: 0

Abstract

The northern part of Namibia suffers from drought and low-quality soil. The soil needs a boost of nutrients, and the water must be used in a frugal manner. Thereby, the objective of this research was to investigate the effect of sludge and treated wastewater as initial nutrient drivers in sandy loam soil by examining the dry biomass (DM), the nutrient uptake, and the heavy metal accumulation in the organs of sorghum. For this reason, sludge, chemical fertiliser, and a mixture of both were applied to a sorghum field. As a second factor, water of two different qualities was used: (a) treated wastewater (TWW), and (b) tap water. The treatment with mixed-fertiliser produced 16% more DM compared to the treatment with chemical fertiliser when irrigated with tap water. The use of TWW enhanced phosphorus uptake in the treatment with chemical fertiliser but did not increase the DM. This study suggests that sludge can be applied as an initial nutrient driver for poor soil with low organic matter and that TWW can also be an important complementary water resource for irrigation in areas affected by drought.

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污泥作为提高纳米比亚北部贫瘠土壤产量的初始营养驱动因素

纳米比亚北部地区干旱，土壤质量低。土壤需要补充养分，而且必须节约用水。因此，本研究的目的是通过检测高粱的干生物量、养分吸收和重金属在各器官中的积累，探讨污泥和处理后的废水作为砂壤土初始养分驱动因素的影响。由于这个原因，污泥、化肥和两者的混合物被施用于高粱田。作为第二个因素，使用了两种不同质量的水:(a)处理过的废水(TWW)和(b)自来水。当用自来水灌溉时，混合肥料处理比化学肥料处理多产生16%的干物质。在施用化肥的处理中，TWW的使用增加了磷的吸收，但没有增加DM。这项研究表明，污泥可以作为低有机质贫瘠土壤的初始养分驱动因素，TWW也可以成为受干旱影响地区灌溉的重要补充水资源。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

South African Journal of Plant and Soil Agricultural and Biological Sciences-Plant Science

CiteScore

1.90

自引率

11.10%

发文量

期刊介绍： The Journal has a proud history of publishing quality papers in the fields of applied plant and soil sciences and has, since its inception, recorded a vast body of scientific information with particular reference to South Africa.