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首页> 外文期刊>Agricultural Water Management >Effect of different saline groundwater depths and irrigation water salinities on yield and water use of quinoa in lysimeter
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Effect of different saline groundwater depths and irrigation water salinities on yield and water use of quinoa in lysimeter

机译：溶渗仪中不同盐分地下水深度和灌溉水盐度对藜麦产量和水分利用的影响

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Water scarcity and water salinity are major constrains for agricultural production in arid and semi-arid regions of Iran. Salt tolerant and high nutritious crop, quinoa, has been introduced all around the world. However, little documented investigations are presented about the effect of different saline groundwater depths and irrigation water salinities on plant growth, yield and water use of quinoa. Therefore, the aim of this study was to investigate the influence of saline groundwater depths, SGD (0.3, 0.55 and 0.80 m) with salinity equivalent to irrigation water and irrigation water salinity, WS (10, 20, 30 and 40 dS m(-1)) on growth and yield of quinoa and groundwater contribution to its water use in cylindrical lysimeters in greenhouse conditions. Results indicated that increasing in WS caused significant decrease in seed yield (SY) and shoot dry matter (SDM) and at all SGDs. However, root dry matter (RDM), harvest index (HI), protein content, 1000-seed weight (SW), number of panicle per plant (NP) and plant height (PH) are reduced by WS higher than 20 dS m(-1). Furthermore, at all WSs increasing in SGD resulted in significant increase in SY, SDM, RDM and ET. Results indicated that quinoa is able to extract water (groundwater contribution to evapotranspiration ratio, GWC/ET as 18 to 66%) from saline groundwater, even at no deficit irrigation conditions. Contour plot was developed to show the combined effect of WS and SGD on GWC/ET. It is indicated that non-saline groundwater depth lower than 1.62 m could contribute to quinoa water use. In presence of saline groundwater (SGD as m), the salinity should be considered by the equation SGD = 1.62 - 0.013WS.Yield-salinity functions indicated that maximum threshold ECe for SY (20.7 dS m(-1)) occurred at 0.80 m SGD and seed yield reduction coefficient (b) was on average, 7.7% per unit soil salinity increase. Also, increasing in SGD resulted in significant decrease in RDM reduction coefficient. Minimum RDM reduction coefficient was 5.5% per unit soil salinity increase. It showed that quinoa root is more tolerant to salinity than shoots. (C) 2014 Elsevier B.V. All rights reserved.
机译：缺水和盐碱化是伊朗干旱和半干旱地区农业生产的主要制约因素。耐盐和高营养作物藜麦已在世界各地推广。但是，很少有文献记载有关不同盐碱地下水深度和灌溉水盐度对藜麦植物生长，产量和用水的影响。因此，本研究的目的是研究盐度等于灌溉水和灌溉水盐度WS（10、20、30和40 dS m（-）的盐度地下水深度SGD（0.3、0.55和0.80 m）的影响。 1））对藜麦的生长和产量的影响以及地下水在温室条件下圆柱形渗漏仪中的用水量。结果表明，WS的增加导致种子产量（SY）和枝干物质（SDM）以及所有SGD的显着下降。然而，高于20 dS m时，WS降低了根干物质（RDM），收获指数（HI），蛋白质含量，1000粒重（SW），单株穗数（NP）和株高（PH）。 -1）。此外，所有WS的SGD都增加导致SY，SDM，RDM和ET显着增加。结果表明，即使在没有灌溉条件的情况下，藜麦也能够从含盐地下水中提取水（地下水对蒸散率的贡献，GWC / ET为18％至66％）。绘制等高线图以显示WS和SGD对GWC / ET的综合影响。研究表明，非盐碱地下水深度低于1.62 m可能会导致藜麦用水。存在盐碱地下水（SGD为m）时，盐度应通过方程SGD = 1.62-0.013WS来考虑。盐度函数表明SY的最大阈值ECe（20.7 dS m（-1））出现在0.80 m SGD和种子减产系数（b）平均为每单位土壤盐分增加7.7％。同样，SGD的增加导致RDM降低系数的显着降低。每单位土壤盐分增加的最小RDM降低系数为5.5％。这表明藜麦根比芽更耐盐碱。 （C）2014 Elsevier B.V.保留所有权利。

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