Two lettuce (Lactuca sativa L.) varieties (Looseleaf and Romaine) were grown with five colored (silver, red, orange, yellow, green) plastic mulches to determine their effects on the leaf anatomical structure of lettuce. The experiment was laid in a Split Plot Randomized Completely Block Design. The result of the study showed that Romaine lettuce (8.80) had a higher number of stomata compared with Looseleaf (6.73) however; in terms of stomata length the Looseleaf had longer stomata (18.63 µm) compared with Romaine (16.42 µm). More stomata were observed in lettuce grown with red plastic mulch. However, the number of stomata did not differ among the various colored plastic mulches. Longer stomata were observed in lettuce grown with red plastic mulch, compared with lettuce grown with the other colored plastic mulches. The study showed that the color of the plastic mulch had a significant effect on the leaf anatomy of lettuce and red plastic mulch could be used to enhance the length of the stomata which may affect the growth of the lettuce.
Growing of lettuce with different colored plastic mulch was evaluated using two lettuce varieties, Looseleaf and Romaine. The experiment was laid out on Split Plot design following the Randomized Complete Block Design. In terms of yield, the Looseleaf variety had better performance compared with Romaine. The different colored plastic mulch affected the yield performance of the leaf lettuce. Yield of lettuce grown with the red plastic showed better response compared with the other colored plastic mulch. The soil temperature below the plastic mulch was significantly influenced by the color of the mulch. The red plastic mulch had the highest soil temperature recorded while the lowest soil temperature recorded was within the yellow plastic mulch. The soil temperature from the colored plastic mulch generally increased from 6am until 2pm and then declined. Index Terms-colored plastic mulch, lettuce, soil temperature
Looseleaf and Romaine lettuce were grown in a vegetable experimental station in the University of the Philippines Los Banos to determine the effect of the different colored plastic mulch on the leaf morphological characteristics of the two lettuce varieties. A split plot following the Randomized Completely Block Design was used. Results of the study showed that red plastic mulch exhibited better response in terms of the different leaf morphology of the leaf lettuce. Lettuce leaf length, leaf diameter, leaf fresh and dry weight were higher when grown with red plastic mulch compared with the other colored plastic mulch. The result of the study showed that the color of the mulch had significant effect on the leaf morphological characteristics of the leaf lettuce.
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