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首页> 外文会议>Sustainable irrigation and drainage IV: Management, technologies and policies >Utilization and management of irrigation water for sustainable farming of Macadamia nuts in Piesanghoek cropland in Limpopo Province, South Africa
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Utilization and management of irrigation water for sustainable farming of Macadamia nuts in Piesanghoek cropland in Limpopo Province, South Africa

机译：南非林波波省Piesanghoek农田中灌溉和利用灌溉水来持续种植澳洲坚果

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Utilization and management of irrigation water is essential for sustainable farming. The Macadamia cropland in Piesanghoek cropland falls in the arid to semi-arid climatic zone in Limpopo Province of South Africa. It is estimated that irrigated agriculture accounts for 62% of all the water used in South Africa and in many instances, its use is highly inefficient. A few farmers have adopted new computerized technologies for irrigation management but many still use conventional irrigation methods, which are not based on crop water requirements, leading to poor water utilization and low irrigation efficiencies. This study evaluated the Piesanghoek Macadamia cropland to determine the irrigation scheduling schemes for efficient utilization and management of water. Soil samples were analysed for particle size distribution and bulk density while field tests were carried out to determine infiltration rates on the cropland, after which geostatistical tools in ArcGIS were used to show the spatial variability. The South Africa Plant Water (SAPWAT) model was used to automate the irrigation scheduling. The results showed that the supply and availability of soil moisture was of fundamental importance to plant growth and crop production. It also showed that changes in the soil moisture stored in the root-zone were due to differences between the inputs and outputs from this zone. An irrigation efficiency of 80% was achieved and it was observed that the Macadamia trees did not use as much water as the SAPWAT model prescribed.
机译：灌溉用水的利用和管理对于可持续农业至关重要。 Piesanghoek农田的Macadamia农田属于南非林波波省的干旱至半干旱气候带。据估计，灌溉农业占南非用水总量的62％，在许多情况下，其用水效率极低。少数农民采用了新的计算机化技术进行灌溉管理，但许多农民仍使用常规的灌溉方法，这些方法不基于作物的需水量，导致用水量低和灌溉效率低。这项研究评估了Piesanghoek Macadamia农田，以确定灌溉调度方案，以有效利用和管理水资源。分析土壤样品的粒径分布和堆积密度，同时进行田间试验以确定农田的入渗率，然后使用ArcGIS中的地统计学工具显示空间变异性。南非植物用水（SAPWAT）模型用于自动化灌溉计划。结果表明，土壤水分的供应和可用性对植物生长和农作物生产至关重要。它还表明，根区中储存的土壤水分的变化是由于该区的投入和产出之间的差异引起的。灌溉效率达到了80％，并且观察到澳洲坚果树的用水量没有SAPWAT模型规定的那么多。

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