Effects Of Different Rootstock Grafting On Yield, Quality And Seedling Calcium Chloride Tolerance In Tomatoes

Tomatoes (Lycopersicon esculentum Mill.) are generally cultivated in north and south of China, because of its adaptability, a long period of fruiting, high yield, nutritional value, and thus become a popular favorite vegetable varieties. Recent years, with the expansion of cultivation area, on the one hand, in order to the pursuit of economic efficiency, excessive fertilizers were applied by people; on the other hand, due to the long season cultivation facilities for many years without rain and soil moisture leaching evaporation, soil water balance within the facility was destroyed, so that the facility soil salinization, a serious impediment to the sustainable development of vegetable cultivation. Ultimately lead to lower yields and quality of vegetables decreased, it is difficult for farmers and consumer satisfaction. With the improvement of living standards, people on tomato flavor quality have become increasingly demanding. Grafting is an effective way to increase vegetable production, increased quality, enhanced salt tolerance. This experiment is intended to resistant tomato hybrids F1'Guozhen No.1'and wild eggplant'Torvum Vigor' as grafting stocks,'Jinpeng No.1'as the scion, through water culture and soil culture method to study the single and double grafting on growth, yield, fertilizer utilization, fruit quality, and seedling salt tolerance. The main results are as follows:1.The study through scion'Jinpeng No.1'grafted onto different rootstocks by water culture were found that:'Guozhen No.1'grafting and double rootstocks grafting promoted plant growth, increased yield, and compared to non-grafted tomatoes the quality difference was not significant.'Torvum Vigor' grafting inhibited plant growth, a reduced yield significantly, but the quality improved. The specific mechanism of grafting needs to be further studied. After both single and double rootstocks grafting reduced the absorption of water and mineral elements, improved the utilization of water and mineral elements. Therefore, single and double grafting in the greenhouse tomato production facilities, especially in terms of high yield and quality of tomatoes, there is some value in use. But the specific combination of excellent rootstocks need to be further screened.2. The study through scion 'Jinpeng No.1' grafted onto different rootstocks by soil culture were found that:single and double rootstocks grafting, fruit yield increased, fruit quality, compared with non-grafted tomatoes, no significant difference were found. 'Torvum Vigor' grafting, growth was inhibited, a significant reduction in yield, but fruit quality improvd. So tomato grafted onto rootstock of 'Torvum Vigor' improved the quality of tomatoes of facilities, but the specific rootstocks need to be further screened.3. The study through scion 'Jinpeng No.1' grafted onto different rootstocks by water culture under CaCl2 stress were found that: 'Torvum Vigor' grafting plant height relative growth rate, fresh and dry weight, leaf water content was lower than those from the non-grafted tomatoes, content of MDA, proline, soluble sugar and soluble protein in leaves were higher than those from the non-grafted tomatoes. Plant height and relative growth rate, fresh and dry weight, water content, soluble protein, SOD and POD activity in leaves of 'Guozhen No.1'grafting and double rootstocks grafting were more higher than those from the non-grafted tomatoes, on the contrary, MDA, proline and soluble sugar in leaves of tomatoes decreased, compared with those from the non-grafted. Generally speaking, under CaCl2 stress, 'Guozhen No.1' grafting and double rootstocks grafting reduced the damage of salt stress to plants, to some extent alleviated the salt tomato cultivation has some significance, but the specific mechanism needs to be further explored and rootstock selection nees screening.