Effects Of Covering On Overwintering Ability Of Grapevine

With the 6-year-old Red global grape, the effects of different covering methods on overwintering ability of grapevine was studied. Four test treatments were triply conducted as the followings: soil burry(CK), 20 cm soil and black film, 30 cm corn stalk and black film, quilt, with random complete block design.1. The cold capability for the treatment of quilt is optimum on the ground temperature around the grapevine and in 40 cm. Then, the treatments are quilt, corn stalk and film, soil and film, CK, in descending order, about the cold capability.2. Soil and film exhibits the higher water content of grape branches with a great ranger, along with the corn stalk and film. Quilt maintains a low water content.Compared CK, other treatments all improve the total water content of grape branches in winter.3. The soluble sugar for the treatment of quilt relatively stably changed. Under soil and film and CK, the soluble sugar reaches a peak on January 20, and then goes down. The change of soluble sugar content was significantly influenced by the change of temperature.4. All the treatments share the common change trend for the starch content and the amylase activity. The starch content changes opposite to the amylase activity.5. The soluble protein presents an overall trend of flat, with the optimum treatment of quilt. The soluble protein of CK and soil and film is relatively low, and remarkably differentiates from quilt and corn stalk and film. The change of soluble protein content was significantly influenced by the change of temperature. The amino acid content presents a constant ascend trend, significantly higher prior to winter.Different methods of cold-resist amino acid content had no obvious difference. The proline content with CK and soil and film reach peak on January 20, followed by decline. Quilt presents a slow change. The change of the content of proline was significantly influenced by the change of temperature.6. MDA content for quilt presents a continuous rise trend, together with corn stalkand film. MDA content for CK, along with soil and film, reaches the peak on January20, followed by decline. The change of MDA content is obviously influenced by the temperature change.7. SOD activity for quilt and corn stalk and film is relatively low with a slow change, while SOD activity for CK is higher than other treatments. Arranged in descending order of the SOD activity, they are CK, soil and film, corn stalk and film,quilt, in turn.8. POD activity of quilt, together with corn stalk and film, is relatively high, with a slow change. The difference of quilt from corn stalk and film is insignificant. POD activity in CK markedly differentiates from other teams. All the treatments present higher POD activity prior to winter. Arranged in descending order of POD activity,they are quilt, corn stalk and film, soil and film, CK, in turn.9. Arranged in descending order of the germination rate, they are soil and film,CK, quilt, corn stalk and film, in turn. Arranged in descending order of the covering cost, they are CK, corn stalk and film, quilt, soil and film, in turn.10. Overall, quilt should be adopted as the overwintering methods, and widely applied to grape crop.