Factoring labour when comparing in situ rainwater harvesting technologies for semi-arid areas of central Tanzania

IF 2.3 4区农林科学 Q1 AGRONOMY

Archives of Agronomy and Soil Science Pub Date : 2023-02-08 DOI:10.1080/03650340.2023.2175352

E. Swai, L. Mwinuka, M. Shitindi, Julius Manda, A. Whitbread, M. Bekunda

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引用次数: 1

Abstract

ABSTRACT Erratic rainfall, high evapotranspiration rates and droughts are major factors limiting crop production in semi-arid areas. Tied ridges that have crossed ties within the furrow are among the physical soil and water conservation measures. During the 2018/19 and 2019/20 seasons, we examined the efficacy of repaired tied ridges for maize crop (Zea mays) and sorghum (Sorghum bicolor) in Kongwa district of Tanzania as an alternate labour saving strategy for managing climate risks associated with variable rainfall. Treatments consisted of three tillage methods: conventional tillage (CT) which involved the preparation of a flat seedbed using handhoe, annually constructed tied ridges (ATR) and tied ridges that had been constructed during the previous season and had been repaired (residual tied ridges–RTR). Data were collected on labour requirements and crop performance. RTR increased economic returns by 29% and 80% over ATR and CT, respectively. Maize grain yield shows a trend of RTR >ATR>CT with values ranging from 2465 kg ha−1 to 4185 kg ha−1 (P < 0.01). While tillage and/or variety did not influence sorghum grain yield significantly (P > 0.05). The use of RTR is recommended because of low labour requirements and greater economic benefits than CT and ATR under maize cropping systems.

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坦桑尼亚中部半干旱地区现场雨水收集技术比较时的劳动力因素

不稳定的降雨量、高蒸散率和干旱是限制半干旱地区作物生产的主要因素。在犁沟内穿过系带的扎脊是物理水土保持措施之一。在2018/19年和2019/20年季节，我们研究了坦桑尼亚孔瓦区玉米作物（玉米）和高粱（双色高粱）修复捆绑山脊的效果，作为管理与可变降雨量相关的气候风险的替代劳动力节约策略。处理方法包括三种耕作方法：传统耕作（CT），包括使用手持犁准备平坦的苗床，每年建造一次的绑脊（ATR）和在上一个季节建造并修复的绑脊。收集了有关劳动力需求和作物表现的数据。RTR的经济回报率分别比ATR和CT提高了29%和80%。玉米产量呈现RTR>ATR>CT的趋势，其值在2465 kg ha−1至4185 kg ha–1之间（P<0.01）。而耕作和/或品种对高粱产量没有显著影响（P>0.05）。建议使用RTR，因为在玉米种植制度下，RTR比CT和ATR对劳动力的需求低，经济效益更大。

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来源期刊

Archives of Agronomy and Soil Science AGRONOMY-SOIL SCIENCE

CiteScore

5.50

自引率

4.20%

发文量

107

期刊介绍： rchives of Agronomy and Soil Science is a well-established journal that has been in publication for over fifty years. The Journal publishes papers over the entire range of agronomy and soil science. Manuscripts involved in developing and testing hypotheses to understand casual relationships in the following areas: plant nutrition fertilizers manure soil tillage soil biotechnology and ecophysiology amelioration irrigation and drainage plant production on arable and grass land agroclimatology landscape formation and environmental management in rural regions management of natural and created wetland ecosystems bio-geochemical processes soil-plant-microbe interactions and rhizosphere processes soil morphology, classification, monitoring, heterogeneity and scales reuse of waste waters and biosolids of agri-industrial origin in soil are especially encouraged. As well as original contributions, the Journal also publishes current reviews.