| Triticale is a kind of general-purpose crop which serves as grain, cash crop and fodder. As the advantage of good-quality, high-yield and strong-resistance, the super long stalk triticale has becoming the most popular forage grass in pasturing area. The haloduric character of triticale has been causing great concern, especially in XinJiang where has a large area of salinization farmland. Although many studies have made a certain amount of progress about triticale, they have their limitations. For example, haloduric is an important character of triticale, yet many researchers consider triticale without any consideration of its haloduric mechanism. In this paper, four varieties (Xinxiaoheimai3, H04-1, Xinxiaoheimai 5, H04-2) were chosen as the material, we studied the haloduric physiological character and the biotechnological function of triticale under NaCl stress. The results are as follows:1. Compared with xinxiaoheimai 5 and H04-2 varieties, xinxiaoheimai 3 and H04-1 showed strong haloduric character. 15 days after water cultivation, seeding grow process such as seedling root length; seedling length; root number and dry matter were greatly influenced by NaCl density. Difference between varieties showed extreme markedness.2. It was concluded that inhibitory action under NaCl stress was happened mainly during the process of seed sprouts and seed root. Triticale seedling root received higher suppression rate than the bud under low-density (50mmol/L) NaCl stress. While triticale seedling bud received higher suppression rate than the root under high-density (150—200mmol/L) NaCl stress.3. 15 days after water cultivation, Chl content in triticale leaf first ascended and then declined along with NaCl stress density increased. During the stage of tillering and blooming, Chl content in bonsai triticale leaf declined gradually along with the increase of NaCl stress density.4. Pro content in triticale leaf was improved along with the increase of NaCl stress density. Pro content in bonsai triticale leaf was smooth during the stage of tillering and blooming. Soluble sugar content in triticale leaf was declined along with the increase of NaCl stress density. As a kind of adjustment matter, this trend was opposite to pro content in triticale leaf.5. Cell membrane penetrability of triticale leaf first decreased and then increased along with the increase of NaCl stress density, which means sufficit quantum NaCl was positive to the integrality of cell membrane system. Along with the increase of NaCl stress density, the change of exosmose conductivity rate was quicker in triticale leaf than in triticale root. In the matter of cell membrane integrality, triticale leaf was more sensitive to NaCl than triticale root was.6. The content of Cl-, K+, Na+, Ca2+, Mg2+showed obviously change in triticale organs under NaCl stress. Cl-, Na+ content in triticale organs were improved gradually along with the increase of NaCl stress density. The distribution of Cl- mainly gathered in triticale root. While the distribution of Na+ mainly gathered in triticale leaf. K+ content in triticale root, stem, leaf, leaf sheath first increased and then declined along with the increase of NaCl stress density, while K+ content in triticale grain declined gradually along with the increase of NaCl stress density. The content of Ca2+ and Mg2+ in triticale organs declined gradually along with the increase of NaCl stress density. The distribution of Ca2+ mainly gathered in the ground-part of triticale organs. While the distribution of Mg2+ mainly gathered in underground-part of triticale organs.7. The general soil salt content in compound culture were 0.068% , 0.168% , 0.368% , 0.568% , 0.768%.After growing triticale for 1 season, soil salt content in compound culture decreased by 0.015%, 0.045%, 0.107%, 0.120%, and 0.186%. Desolinization rate has achieved 22.1%,26.8%,29.1%,21.1%,11.2% respectively. Therefore, we can conclude that triticale has an outstanding effect on salinization farmland ameliorating.
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