EFFECTS OF IRRIGATION INTERVALS ON THE ROOT SYSTEM OF HYDROPONIC LETTUCE

被引：0
|
作者：
da Luz, Gean Lopes [1 ,2 ]
Petter Medeiros, Sandro Luis [3 ]
Borcioni, Elis [4 ]
Lajus, Cristiano Reschke [5 ,6 ]
Ferrazza, Adriana Cioato [6 ]
Verona, Regina Bellan
机构：
[1] Univ Comunitaria Regiao Chapeco UNOCHAPECO, Chapeco, Brazil
[2] Programa Posgrad Tecnol & Gestao Inovaca, BR-89809000 Chapeco, SC, Brazil
[3] Univ Fed Santa Maria, Santa Maria, RS, Brazil
[4] Univ Fed Santa Maria, Agron, Santa Maria, RS, Brazil
[5] Univ Oeste Santa Catarina, Joacaba, Brazil
[6] UNOCHAPECO, Chapeco, Brazil
来源：
INTERCIENCIA | 2017年 / 42卷 / 06期
关键词：
D O I：
暂无
中图分类号：
Q14 [生态学（生物生态学）];
学科分类号：
071012 ; 0713 ;
摘要：
The aim of this study was to evaluate the effect of the irrigation interval on the root system and nutrient solution retention in hydroponic lettuce (Lactuca sativa L.). An experimental design with randomized blocks and three replications was used. The irrigation time was fixed at 15min in crops cultivated in the four seasons. The treatments consisted of differentiated intervals:between irrigations during daytime, which were 15, 30, 45 and 60min (T15, T30, T45 and T60, respectively). The increase in the interval between irrigations determined an increase in volume and dry weight of roots, favoring the retention of the nutrient solution. This increase of the root system allowed the retention of the same amount of nutrient solution, independent of irrigation intervals, without prejudice to shoot dry biomass and leaf area of the hydroponic lettuce. Treatment T60 permits a 53,57% reduction in electric energy consumption without loss of productivity.
引用
收藏
页码：370 / 374
页数：5
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