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首页> 外文期刊>Agricultural Water Management >Integrating partial root-zone drying and saline water irrigation to sustain sunflower production in freshwater-scarce regions
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Integrating partial root-zone drying and saline water irrigation to sustain sunflower production in freshwater-scarce regions

机译：整合部分根系干燥和盐水灌溉，在淡水稀缺地区维持向日葵生产

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摘要

Applying saline water resources for irrigating croplands requires serious attentions when sustainable agriculture is considered. A two-year field investigation was carried out in a drip-irrigated sunflower field under six irrigation treatments, including (i) full freshwater irrigation (FI), full irrigation with diluted seawater (DS) (SI), alternate DS-freshwater irrigation (FSI), freshwater-PRD (partial root-zone drying) irrigation with 25 % less water than full (PRD1), DS-PRD irrigation with 25 % less water than full (PRD2), alternate DS-freshwater irrigation under PRD with 25 % less water than full (PRD3), in three replicates. Compared to the FI treatment, crop yield was reduced by 3.1-32 %, with the lowest one under PRD1. Among the DS treatments, PRD3, resulted in the highest grain yield (4306 kg ha(-1)), grain nitrogen content (2.83 %), oil yield (1907 kg ha(-1)) and irrigation water productivity (1.10). PRD3 also saved freshwater by 20 %, and kept soil salinity of the rooting-zone below the maximum crop tolerance threshold. Based on the results, PRD3 might be a cost-effective pathway which guarantees the sustainable application of diluted seawater in the irrigated sunflower lands.
机译：当考虑可持续农业时，施用盐水水资源需要严重关注。在六个灌溉治疗的滴灌的向日葵领域下进行了两年的实地调查，包括（i）全淡水灌溉（FI），用稀释的海水（DS）（Si）全灌溉，交替的DS-淡水灌溉（ FSI），淡水 - PRD（部分根型干燥）灌溉量小于全水25％（PRD1），DS-PRD灌溉量小于完全（PRD2），PRD下的交替DS淡水灌溉25％三种复制中的水少于完整（PRD3）。与FI处理相比，作物产量减少了3.1-32％，PRD1下的最低1。在DS治疗中，PRD3导致籽粒产率最高（4306千克（-1）），籽粒氮含量（2.83％），油产量（1907kg ha（-1））和灌溉水生产率（1.10）。 PRD3还将淡水储存20％，并保持根部的土壤盐度低于最大作物公差阈值。基于结果，PRD3可能是一种经济高效的途径，可确保稀释的海水在灌溉向日葵土地上的可持续应用。

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