Effects of Supplementary Light at Different Time on Quality of Cucumber Seedlings in Solar Greenhouse
WANG Bing-hua，SUN Feng-qing，LI Juan-qi，TIAN Yong-qiang，GAO Li-hong*
College of Horticulture，China Agricultural University，Beijing Key Laboratory of Growth and Development Regulation
for Protected Vegetable Crops，Beijing 100193，China
This study was conducted in solar greenhouse where cucumber was cultivated in winter-spring
season．During cotyledon flattened period to the second leaf starting flattened，cucumber seedlings was treated
with supplementary light at different time．During experiment period heat preservation quilt was uncovered from
8：40-16：00 in solar greenhouse．The results showed that compared with the contrast without supplementary
light，supplementary light treatment at T（6：40-9：40），T（13：00-16：00） and T（15：00-18：00）
could significantly increase seedling stem diameter，healthy seedling index，leaf area，contents of chlorophyll，
carotene，soluble sugar，starch，etc．and seedling dry weights of underground，over ground parts and whole
plant．To sum up，the effects of supplementary light by the above 3 treatments are obviously superior than that of
T（8：40-11：40） and the contrast．These 3 treatments are in favor of cultivating healthy seedlings．The effects
of these 3 treatments are basically the same．
王冰华，孙风清，李娟起，田永强，高丽红. 不同时段补光对日光温室冬春茬黄瓜幼苗质量的影响[J]. 中国蔬菜, 2017, 1(12): 23-29.
WANG Bing-hua，SUN Feng-qing，LI Juan-qi，TIAN Yong-qiang，GAO Li-hong. Effects of Supplementary Light at Different Time on Quality of Cucumber Seedlings in Solar Greenhouse. China Vegetables, 2017, 1(12): 23-29.
