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首页> 外文期刊>Acta Horticulturae >Morpho-physiological and yield modifications in two potato cultivars under different irrigation managements.
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Morpho-physiological and yield modifications in two potato cultivars under different irrigation managements.

机译：不同灌溉管理下两个马铃薯品种的形态生理和产量变化。

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The potato crop (Solanum tuberosum L.) is of great importance in the Uruguay economy, being the major vegetable in volume of trade. Uruguay imports some amount of potato seed annually. The National Institute of Agricultural Research (INIA) has been engaged for the last decades to obtain cultivars more adapted to country agroecological conditions, easier to multiply locally for replacing imported seed cultivars such as 'Chieftain'. In this sense, promising cultivars including 'INIA-Ipora' were developed. The objective of this work was to study the morpho-physiological and yield modifications of two potato cultivars ('Chieftain' and 'INIA-Ipora') under different irrigation managements. The experiment was carried out during 2006 and 2007 growing seasons under a rainout shelter, at the Experimental Station INIA Las Brujas, in Uruguay. These two varieties were studied under two irrigation managements: (i) irrigated treatment (2003/04 rainfall+irrigation according to daily crop ETc) and; (ii) deficit irrigated treatment (2003/04 rainfall+one irrigation of 25 mm when the accumulated maximum daily crop evapotranspiration reached 90 mm). The maximum daily crop evapotranspiration was estimated using the FAO Penman-Monteith equation. The experimental design was a completely randomized split plot. The leaf area index, the total plant photosynthesis and the crop yield better responded to the irrigation regime. The two potato cultivars showed differences in length of growing season, leaf area, number of mainstems, plant height and plant transpiration rates. The yield components were modified by the irrigation managements, and differences in commercial yield and total number of plant tubers were observed between the 'Chieftain' and 'INIA-Ipora' cultivars
机译：马铃薯（Solanum tuberosum L.）在乌拉圭经济中非​​常重要，是贸易量的主要蔬菜。乌拉圭每年进口一定数量的马铃薯种子。美国国家农业科学研究所（INIA）从事了近几十年的研究，目的是获得更适合于国家农业生态条件的品种，更容易在当地繁殖以替代进口的种子品种，例如'Chieftain'。从这个意义上讲，开发了包括“ INIA-Ipora”在内的有前途的品种。这项工作的目的是研究在不同灌溉管理下两个马铃薯品种（“ Chieftain”和“ INIA-Ipora”）的形态生理和产量变化。该实验是在2006年和2007年生长季节，在乌拉圭INIA Las Brujas实验站的防雨棚下进行的。在两种灌溉管理下对这两个品种进行了研究：（i）灌溉处理（2003/04降雨+根据日粮ETc进行灌溉）;以及（ii）亏缺灌溉处理（2003/04年降雨+一次作物灌溉25毫米，当日最大作物蒸散量累计达到90毫米时）。使用FAO Penman-Monteith方程估算了最大的每日作物蒸散量。实验设计是完全随机的分割图。叶面积指数，总植物光合作用和农作物产量对灌溉制度有更好的响应。这两个马铃薯品种在生长季节的长度，叶面积，主茎数量，植物高度和植物蒸腾速率上都存在差异。通过灌溉管理对产量构成要素进行了修改，在“ Chieftain”和“ INIA-Ipora”两个品种之间观察到商业产量和块茎总数的差异。

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