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Cucumber (Cucumis sativus L.) is an important vegetable crop widely cultivated around the world. Grafting is an effective measure to improve the cucumber stress resistance, and has been applied to cucumber production, but the traditional plug and cleft grafting grafting way there are different degrees grafted low efficiency or low survival rate of grafting prominent shortcomings, thereby constraining the grafted cucumber nursery production, our group has been established to the factory production for grafted cucumber seedlings the efficient root pruning grafted technical system, but for the advantages of root pruning grafting mechanism is not yet clear. The paper through the study of different grafting methods on cucumber seedlings growth of period proved different grafting methods on cucumber seedlings growth and physiological characteristics comparison grafted cucumber seedlings under different temperature treatment self-root seedlings growth and physiological response to clarify cucumber root pruning grafting advantage physiological mechanism. The paper also cucumber root pruning grafting technology standards and different grafting methods on the growth and quality of cucumber. The main findings are as follows: 1 black seed pumpkin rootstocks, the cucumber scion using root pruning grafted, plug and cleft grafting grafting methods, \control, to study the impact of different grafting methods on cucumber seedlings growth and physiological characteristics. The results showed that, 13 days after grafting, no significant differences in the growth of three kinds of grafted seedlings before to 16 days after grafting the root pruning grafted seedlings scion long, scion dry weight, leaf area was significantly higher than cleft grafting, plug handle this when grafted seedlings stem diameter, leaf area were also higher than the self-root seedlings. Grafted cucumber seedling leaf net photosynthetic rate (Pn) is enhanced significantly increase the number of electron transfer for the photochemical efficiency of PS Ⅱ, grafted to handle the increased xylem sap of cucumber seedlings K , Ca 2 , the Mg 2 and ZT and GA content reduced ABA content. Root pruning grafting treatment significantly enhanced cucumber seedling leaves, stomatal conductance (Gs) and transpiration rate (Tr); cleft grafting, plug compared the root pruning grafted cucumber seedlings had higher root activity, gas exchange, xylem sap in contains more K on , Ca 2 , the Mg 2 and ZT this root pruning grafting performance advantage. Black seed pumpkin rootstocks Jinchun \(10 ℃ / 5 ℃), high temperature (40 ° C / 35 ° C), at room temperature (25 ° C / 20 ° C) temperature treatment on the physiological characteristics of cucumber seedlings. The results show that the treatment compared with the normal temperature, low temperature and high temperature stress cucumber self-root seedlings and grafted seedlings are subject to varying degrees of injury, the grafted seedlings damage under low temperature stress significantly lower than the self - rooted, the root pruning grafting the best performance; high temperature stress under grafted seedlings by the degree of injury is significantly higher than the self-root seedlings grafted, the three kinds grafting treatment, root pruning treatment and less traumatically. By injury lighter material leaves contain Pro and soluble sugar, as well as higher POD, SOD activity in the low and high temperature stress. 7 days after stress release temperature, low temperature processing material recovery in the high-temperature processing material, grafted seedlings recovery than self - rooted. That grafted to black seed pumpkin, cucumber seedling resistance to low temperature enhancement, but the high temperature diminished capacity, the use of the root activity of cucumber seedlings after root pruning grafting treatment, leaf osmotic adjustment substance more POD, SOD activity was higher, resist more temperature stress. To \cm, 0.8 cm, 1.2 cm), shoot height (3 cm, 4 cm, 5 cm) deal with the root pruning grafting, the study root pruning affect the growth of grafted seedlings grafted different methods. The results show that, the different insertion matrix depth treatment trials, two rootstocks grafted seedlings are 1 cm treatment scion dry weight, leaf area is also higher; 3 cm underground treatment on the growth potential of the poor performance. Different facets length treatment test, root dry weight, scion long, leaf area index were 1.2 cm handle minimum best 0.8 cm processing performance, and 0.8 cm handle the highest survival rate of the grafted seedlings. The different aboveground highly treatment no significant effect on the survival rate of grafted seedlings; the the grafted seedlings scion length and leaf area are aboveground processing height of 3 cm, 4 cm treatment smallest. The integrated indicators think, insert matrix depth of 1 ~ 2 cm, scion section of about 0.8 cm in length, shoot rootstock height of about 3 cm cucumber root pruning, grafting. 4 black seed pumpkin rootstocks Jinchun 2 \cultivation under different grafting methods on the growth of cucumber and fruit quality. The results showed that the grafting postpone the first female flower opening hours, but grafting to improve pre-growing of cucumber plants grafted plants yield significantly higher than those of rooted. And Own Root grafting cucumber fruit water content, soluble sugar content no difference; increase of soluble protein, free amino acids; Vc decreased; taste the flavor to be slightly lower than the self-docking process of rooted. Show that different grafting methods on the growth of the cucumber entire growth period, no significant effect on yield and cucumber quality.
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