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首页> 外文期刊>Spanish Journal of Agricultural Research >Oxygen enrichment of nutrient solution of substrate-grown vegetable crops under Mediterranean greenhouse conditions: oxygen content dynamics and crop response.
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Oxygen enrichment of nutrient solution of substrate-grown vegetable crops under Mediterranean greenhouse conditions: oxygen content dynamics and crop response.

机译：地中海温室条件下基质生长的蔬菜作物营养液中的氧气富集：氧气含量动态和作物响应。

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摘要

This work assessed the seasonal dynamics of the substrate oxygen content and the response to oxygen enrichment of nutrient solution (oxyfertigation) of autumn-winter sweet pepper and spring melon crops grown on rockwool slabs (2003/04 season) and perlite grow-bags (2004/05), compared to non-enriched crops. Dissolved Oxygen (DO) values in the nutrient solution were higher for all the oxygen enriched treatments (>20 mg L-1) than for the non-enriched ones (~4 mg L-1), but no significant differences were found in the substrate solution. For pepper crops, DO values were highest at the onset and, especially, at the end of the cycle in winter, while the lowest DO values (3 to 4 mg L-1) occurred during September and October. For melon, DO values decreased progressively from the onset of the cycles to values <=3 mg L-1 during the second half of the cycles. For pepper crops, there were no significant differences between oxygen treatments for fruit production, which could be attributed to the fact that DO values were >3 mg L-1 throughout each crop cycle. However, a significant 7% increase in total and marketable yield, associated with a higher fruit number, was observed for the oxygen enriched melon grown on rockwool slabs, whereas no significant differences were found for the melon grown on perlite grow-bags. In conclusion, the use of inexpensive systems of substrate oxygen enrichment should be restricted to rockwool substrates and to crop periods when a high oxygen demand coincides with low oxygen availability, such as the period from melon flowering phase.
机译：这项工作评估了在岩棉平板（2003/04季）和珍珠岩生长袋（2004年）上生长的秋冬甜椒和春瓜作物的底物含氧量的季节动态以及对营养液富氧的响应（增氧作用） / 05），相比于非浓缩作物。所有富氧处理（> 20 mg L -1 ）在营养液中的溶解氧（DO）值均高于未富氧处理（〜4 mg L -1） ），但在底物溶液中未发现明显差异。对于辣椒作物，DO值在发病初期，尤其是在冬季的周期结束时最高，而在9月和10月发生的DO值最低（3至4 mg L -1 ） 。对于甜瓜，DO值从周期开始逐渐降低，在周期的后半段逐渐降至<= 3 mg L -1 。对于辣椒作物，氧气处理对水果生产的影响没有显着差异，这可以归因于以下事实：在每个作物周期中，DO值均> 3 mg L -1 。然而，观察到在岩棉平板上生长的富氧甜瓜的总产量和可销售单产显着增加了7％，并伴随着较高的果实数量，而在珍珠岩生长袋上生长的甜瓜没有发现显着差异。总之，廉价的底物氧富集系统的使用应仅限于岩棉底物和高氧需求与低氧可利用性同时的农作物时期，例如从甜瓜开花期开始的时期。

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