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首页> 外文会议>International Symposium on Advanced Technologies and Management Towards Sustainable Greenhouse Ecosystems >Growth, Water Consumption and Use Efficiency of Summer Squash Crop in Closed Rice Husk Medium Growing System
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Growth, Water Consumption and Use Efficiency of Summer Squash Crop in Closed Rice Husk Medium Growing System

机译：封闭稻壳中养殖系统夏季南瓜作物的生长，耗水和利用效率

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The determination of both crop water consumption and use efficiency provides important information for the irrigation management, especially in soilless culture in which all water must be supplied by the irrigation. In this system, the water consumption, as well as plant growth and crop yield, is affected by the ionic concentration of nutrient solution. Therefore, the aim of this work was to evaluate growth, yield and water consumption and use efficiency (WUE) of summer squash plants growing in raw rice husk medium with recirculating nutrient solution according to the ionic concentration of nutrient solution. Two experiments were conducted in spring-summer and summer-autumn crop-seasons, in Pelotas RS, south of Brazil. Four ionic concentrations of nutrient solution supplied to the crop were evaluated: 1.3, 1.7, 2.1 and 4.2 dS/m. The water consumption was not affected by the ionic concentration in spring-summer (139.9 L/plant). In summer-autumn, the increasing of ionic concentration increased the water consumption (from 41.6 to 71.6 L/plant). Ionic concentrations equal or lower than 1.7 dS/m decreased growth and yield in both crop-seasons and, in spring-summer, reduced the WUE related to fresh and dry mass fruits production. In summer-autumn, ionic concentration did not affect WUE (37.8 L of water per kg of fruit fresh weight and 0.98 g of fruit dry mass production per L of water). According to the adjusted mathematics models, the electrical conductivity that maximizes (respectively in spring-summer and summer- autumn) the fruits dry mass (259.4 and 78.31 g/plant) and crop yield (7.8 and 3.7 kg/m2) for both crop-seasons and WUE (21.5 L of water/kg of fruit fresh weight and 1.94 g of fruit dry mass/L of water) in spring-summer is approximately 3.0 dS/m. Ionic concentrations greater than 3.0 dS/m reduced fruits and shoot dry mass, yield and WUE in spring-summer.
机译：的两个作物用水量和使用效率的确定提供了用于灌溉管理的重要信息，尤其是在其中必须由灌溉供给所有的水无土栽培。在该系统中，水的消耗，以及植物生长和作物产量，通过营养物溶液的离子浓度的影响。因此，这项工作的目的是评价生长，产量和水的消耗和西葫芦植物生稻壳介质与根据营养物溶液的离子浓度再循环营养液生长的利用效率（WUE）。两个实验是在春夏季和夏秋季作物季节进行，在佩洛塔斯RS，巴西南部。供给到作物营养液的四个离子浓度进行了评价：1.3，1.7，2.1和4.2的DS /米。耗水量并不受在春夏季的离子浓度（139.9 L /植物）。在夏秋季，离子浓度的增加而增加耗水量（从41.6到71.6升/植物）。离子浓度等​​于或大于1.7德尚降低/米两种作物季节生长和产量下降，并在春夏季，减少相关的新鲜和干质量水果生产WUE。在夏秋季，离子浓度不影响WUE（37.8升每果鲜重公斤水和每水1L0.98克水果干大量生产的）。根据调整后的数学模型中，导电率最大化（分别在春夏季和秋季夏令时）的果实干燥质量（259.4和78.31克/植物）和作物产量（7.8和3.7千克/平方米），用于两个的作物季节和WUE（21.5升水/ kg的果实鲜重和1.94克水果干质量/ L的水的）在春夏季为约3.0 DS /米。离子的浓度大于3.0 DS /米减小水果和拍干质量，产量和水分利用效率的春夏季。

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