The Nutrition Effect Of Selenium-Sulphur On Garlic(Allium Sativum L.)

The fitness of soil pH and the coordination effect of phosphate fertilizer apply were discussed, and the effect of sulphur apply, the nutrition effect of Selenium-Sulphur cooperated spraying on leaves or mixing in soil on the garlic were studied especially through the field or pot experiment in 2000-2002.(1) The soil pH was an important limiting factor in the garlic growing and developing. The acidic-neutral soil (pH5.45-6.57) were the agreeable environment to the garlic, and the neutral soil (about pH6.57) was the best environment in our study. Compare to the strong acidic soil and feeble alkalic soil condition, the effect of alkalic soil on the garlic were relative great. At the same time, the effect of the high level phosphate fertilizer apply on the garlic were not obvious compare to the soil pH in our results.(2) The garlic could suffer very higher sulphur rate applied, the results showed that the plant height, leaf area, economy yield(garlic bulbs) and economy coefficient were to the top when the medium sulphur rate supply. But the stem diameter and biologic production were upmost in the high sulphur level., Under the Surphur supply of 0~120kg/hm , the total sulphur(TS), water-solubility sulphur(SS) and inorganic sulphur (Io-S) content of garlic were raised following the sulphur supply. The small molecule sulphur in amino-acid (Ws-S) content were upmost under the low sulphur supply. But the big molecule sulphur in protein (Wis-S) content were to the tiptop in the medium sulphur supply, accorded with the variety of allicin of garlic. The relation between the allicin content and the ratio of different sulphur components were reviewed, and the best distinct positive correlation(r=0.752**) between the Ws-S/TS and allicin content, and the distinct correlation(r=0.702*) between the Io-S/SS and allicin content were found. Sulphur and nitrogen promoted each other. The phosphorus and the potassium conten were to the tiptop when the low and medium sulphur level applied, respectively.(3) The obvious improvement on mineral nutrition and nutrition quality(especially on the medicine and health quality) were found by the Selenium, Sulphur and Selenium-Sulphur applied in soil or spraying on leaves. After the garlic bulbs were harvested, 10 essential mineral elements, different Selenium components and the fresh quality (Allicin, Vitamin C)of garlic were determined. 10 essential mineral elements and the Selenium components were analyzed by the Principal Component Analysis (PCA) and the Factor Analysis (FA) on the SPSS 10.0 for Windows. The linearity molders between the garlic nutrition quality (Allicin, components of Selenium, Vitamin C) and the main mineral factors ,and the main mineral factors were named as the garlic nutrition quality, to be examined The analysis of variance by the main factor scores saved as the second variables and the multiple comparisons of the nutrition qualities between the different treatments were done. The results showed, cooperated soil supply of Selenium-Sulphur enhanced the garlic nutrition quality through the increasing of mineral nutrition, but there was a passive effect on the flavor quality (Allicin) of the garlic along with the rising of Sulphur levels. And if the available Se and S were sufficient in the soil, the positive effects of Selenium-Sulphur were only found in the ratio of 1:4-8. Equally, The Selenium , Sulphur and Selenium-Sulphur cooperated spraying enhanced the garlic nutrition quality through the increasing of corresponding mineral nutrition. And if the available Se and S were sufficient in the soil, the positive effects of Sulphur nutrition under the low-medium level Selenium (20-40mg/L Na2SeO3) cooperated with the fixed level Sulphur (2500mg/L(NH4)2SO4), namely the Selenium-Sulphur propertion is about 1:125-62.5.