Study Of Selenium On The Growth Development, Yield And Quality Of Onion

The selenium is the human and the animal maintenance organism health essential trace element. At present already confirmed the selenium main function was catalyzes the peroxide to decompose, blocks the lipin peroxidation chain reaction and eliminates certain organic hydride, protects the biomembrane structure and the function integrity. The modern medical research indicated that, right amount makes up the selenium to have the enhancement organism immunity, delays senilly, guards against the cancer anti- cancer the effect, therefore the selenium by the reputation is "the life wonderful effect element" and "king of the anti- cancer". Executes the selenium through the vegetables to be possible to cause the inorganic selenium to transform the organic selenium after the vegetables absorption, enhances the selenium the biological activity, easy by human body absorption use, therefore, the research vegetables have the vital significance to the selenium absorption transformation characteristic to the rich selenium vegetables development. Onion is one of the most important vegetable since it possesses a unique flavor and odor that made it an excellent food source in the world. Furthermore, it has certain functional role and commercial value. In the recent years , the consumption of onion has increased rapidly; therefore, onion is of broad prospects. In the onion included the ocean onion oil, the big garlic oil, the GSH have the good anti- oxidation and the anti- tumor function, very many countries already the ocean onion oil which withdrew from the onion list as the disease-resistant matter. Therefore, this experiment tries the material by the onion achievement, take the sodium selenite as the selenium source, through soil executes the selenium, the leaf surface spurts the selenium, the selenium soaks the root three processing ways to study the different density to the onion growth and the anti- oxide compound archery target influence; Different selenium density to onion selenium content and selenium shape influence. The test result indicated that,Executes the selenium to be possible to promote the onion adult plant growth growth. Obtains to the onion growth target generalized analysis, The low density selenium (soil executes selenium ≤ 0.25 g·m^-2, leaf surface spurts selenium≤40 mg·kg^-1, selenium soaks root density ≤0.25%) to be possible to promote the onion growth, enhance the onion the yeild, increase the content of bulb soluble protein, the content of Vc, and the content of GSH. But highly concentrated selenium(soil executes selenium≥1.25 g-m^-2, leaf surface spurts selenium≥80 mg-kg^-1, selenium soaks root density≥0. 5%) then suppression onion growth, even produces poisons the...