Istituto per I Sistemi Agricoli e Forestali del Mediterraneo (CNR), Sect. Catania, Str.le V. Lancia, Blocco Palma, I-95121 Catania, Italy.
J Sci Food Agric. 2010 Jan 15;90(1):85-90. doi: 10.1002/jsfa.3786.
There is little research on evaluating the compatibility of potatoes for double cropping in southern Italy. The aim of this investigation was to assess tuber yield and some qualitative traits of tubers such as skin colour, tuber dry matter content and tuber nitrate content, both in winter-spring and in summer-autumn crops, as influenced by genotype and harvest time.
Yield, skin colour and dry matter content of tubers were higher in the winter-spring crop than in the summer-autumn crop, attributable to the advantageous lag time in spring between solar radiation and temperatures and the disadvantageous lag in autumn. Spunta and Arinda performed well within each crop season, whereas Ninfa showed an important yield loss in autumn. In both off-season crops, delaying tuber harvest until leaf senescence increased yield and improved quality attributes such as tuber dry matter content and skin colour, whereas nitrate contents significantly decreased in the winter-spring crop and increased in the summer-autumn crop. Ninfa showed less tendency than Arinda and Spunta to accumulate nitrate in tubers in both off-season crops.
It might be advantageous to examine in further research which mechanisms sustain compatibility to the autumn and assess other quality characteristics for the fresh market in the contrasting climatic conditions of the two off-season crops.
在意大利南部，关于评估马铃薯两季复种的兼容性的研究甚少。本研究旨在评估不同基因型和收获时间对冬-春茬和夏-秋茬块茎产量和一些块茎品质特性（如皮色、块茎干物质含量和块茎硝酸盐含量）的影响。
冬-春茬的块茎产量、皮色和干物质含量均高于夏-秋茬，这归因于春季太阳辐射和温度之间的有利滞后期，以及秋季的不利滞后期。Spunta 和 Arinda 在每个茬口表现良好，而 Ninfa 在秋季的产量损失较大。在两个反季节作物中，延迟块茎收获至叶片衰老可以增加产量，并改善块茎干物质含量和皮色等品质特性，而硝酸盐含量在冬-春茬中显著降低，在夏-秋茬中增加。与 Arinda 和 Spunta 相比，Ninfa 在两个反季节作物中积累硝酸盐的趋势较小。
在进一步的研究中，有必要研究哪些机制支持与秋季的兼容性，并评估两个反季节作物中截然不同的气候条件下对鲜食市场的其他品质特性。
