Effect of cutting method on the growth physiology of hydroponics lettuce with dense planting in Hainan during the high temperature season
LIU Ya
ZENG Liping
CHEN Yanli
FU Yanan
ZHU Guopeng
Abstract：In order to explore the effects of different cutting methods on the growth physiology of regenerated lettuce seedlings,four different varieties of leaf lettuce (' Mixiang lettuce',' Liangjian lettuce','Naiyou lettuce',' Puri F 1 Italy Rome lettuce') were used as materials in over-summer hydroponics with dense planting in this experiment,influences of removing or keeping growth-point on morphology,physiology and quality index of regenerated lettuce seedling rate were studied.The results showed that the cutting adaptability of 'Naiyou lettuce'was superior to other 3 lettuce varieties.Meanwhile,main morphological indexes of all lettuce varieties of keeping growth point were remarkably superior to that of removing growth point,effects of cutting method on root morphological indexes of regeneration lettuce seedlings had no significant difference,but root vigor of cutting lettuce with growth point were significantly higher than that of cutting lettuce with removing growth point,the resistance of regeneration seedlings with removing growth point was improved by accelerating the synthesis of Vitamin C.The key technology of cutting lettuce was to keep growth point,and the suitable lettuce cutting method in high temperature season in Hainan was to cut leaves by keeping growth point with the growth point height was no more than 3 cm,which was good for sustaining apical dominance,accelerating slow seedling,increasing survival rate,improving the yield of regeneration plants.
Keywords：Leaf lettuceDense plantingCutting methodHigh temperature seasonGrowth physiologyHainan
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 14-18 )