摘要
Abstract
[ Objective ] The purpose was to understand the effects of weak light on the growth of cucumber. [ Method ] With the spine type cucumber varieties, Biyu, Zhongnong 21, Jinyou 3 and Beijing 103 which were planted in greater area, as the tested materials, the sunshade nets sold in the market were used to make the different light intensity conditions with the shading rate of 25％ and 50％. The shading treating tests were conducted in the greenhouse to study the effects of the different light intensity conditions on the plant morphological and photosynthetic characteristics of different cucumber varieties. [ Result ] The shading treatment could make the cucumber appear the overgrowth and reduce the dry matter and yield, among them, Beijing 103 was in the largest in the range of the yield reduction and its yield per plant in the50％ shading treatment was 66.7％ lower than that in the CK of full light intensity; Jinyou 3 was in the smallest in the range of the yield reduction and its yield was reduced by 25.6％. Shading treatment could make the significant reduction on the content of chlorophyll a in the cucumber and had no significant effect on the content of chlorophyll b and a/b, but it made the significant reduction on the content of chlorophyll a + b, in which, Jinyou 3 was the smallest in the range of decreasing the content of chlorophyll a and chlorophyll a + b and showed the stronger ability on weak-light resistance. [ Conclusion] Jinyou 3 is an excellent variety resistant to the weak light, which is suitable for the greenhouse production in the northern region.关键词
光强/温室/黄瓜/植株形态/光合特性Key words
Light intensity/ Greenhouse/ Cucumber /Plant morphology/ Photosynthetic characteristics分类
农业科技
