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Aiming at the problems of lower efficiency of manual grafting, great demands of professional grafting workers and unstable grafting quality, an automatic vegetable grafting machine was designed to automate the grafting process such as cutting, pasting, wrapping, and cutting rootstocks and scion seedlings, which greatly reduced the labor intensity of grafting work . This grafting machine used a horizontal drum multi station grafting method for grafting, and adopted a four-station and four-module structural foundation to simplify, distribute, and parallelize the grafting process, which achieved automatic grafting accurately, stably, and efficiently. The positioning accuracy of the grafting machine was ± 0. 2 mm, which achieved high-precision grafting of seedlings. The grafting rate was 1 401. 0 plants per hour. The grafting success rate was 98. 8%, and the strong seedling rate was 98. 0%, which achieved the goal of fast and high-quality grafting seedling cultivation. [ABSTRACT FROM AUTHOR]

[Objective]To screen suitable plug specifications for mechanical seeding of rootstock with root-cut splice grafting. [Method]Different plug specifications were used for rootstock seedling cultivation, and then the rootstock was cut off and grafted onto muskmelons. The growth parameter of rootstock and grafted muskmelon seedlings, and the yield and quality were determined. [Result]With the increase of rootstock sowing density, the stem diameter, root dry weight, aboveground dry weight, total dry weight and seedling strength index of rootstock seedlings all showed a downward trend. The stem diameter, root dry weight, aboveground dry weight and seedling strength index of grafted melon seedlings showed a decreasing trend, with T1, T2, T3 and T4 treatments being higher than self rooted seedlings. The number and volume of grafted melon root systems showed a decreasing trend, with no significant difference between T2 and T3 treatments. The single fruit weight and the yield of muskmelon also showed a downward trend. The single fruit weight and the yield of grafted muskmelon were higher than those of self rooted seedlings. Among them, T1, T2, and T3 treatments were 19. 1%, 18. 7%, and 18. 5% higher than the self rooted seedlings, respectively. The soluble solid content in the center and edges of T1, T2, and T3 treatments was higher than that of self rooted seedlings, and there were no dead seedlings in the field. [Conclusion]From this, it can be seen that using 50 hole, 72 hole, and 105 hole tray for rootstock seedling cultivation is beneficial for the growth and development, yield, and quality formation of grafted muskmelons. Taking into account the cost of seedling cultivation, using 105 hole tray for rootstock seedling cultivation has better economic benefits. [ABSTRACT FROM AUTHOR]

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