Detailed Explanation of Key Overwintering Management Techniques for Wild Rice Stem
Wild rice stem (Zizania latifolia) is a warmth-loving plant that reproduces asexually through tillering and division. Its optimum growth temperature is 10-25°C, and it is not tolerant of cold or of high-temperature drought. The frost-free period in cultivation areas must be more than 150 days. After frost, the wild rice stem leaves wither and die, and during dormancy it can withstand low temperatures of -10°C. In northern China, where the frost-free period is short, single-harvest wild rice stem is mainly planted. Single-harvest wild rice stem is suitable...
After the autumn wild rice stem harvest, the wild rice stem enters the overwintering period, and the quality of overwintering management directly affects next year's wild rice stem yield. Therefore, doing a good job of overwintering management for wild rice stem is very important. The Chongxian Town Agricultural Office has actively carried out wild rice stem overwintering management work, mainly in the following aspects: First, do a good job of water and slurry management for overwintering wild rice stem, preventing freezing and keeping warm to promote early growth. Because in winter the weather is relatively cold, with frost, ice and snow. If the field has no water and undergoes freezing, it will likewise cause delayed growth and delayed tillering. Therefore, during the overwintering period of wild rice stem, a water layer of 1.5-2 cun is required; after seedlings emerge in spring, water management can be reduced when temperatures rise. Second, do a good job of cutting off old sheaths of wild rice stem to promote new growth. Because whether or not the old leaves of wild rice stem are cut has a great impact on next year's growth and tillering. If the old leaves are not cut off, next year's growth will be delayed and tillering reduced. The height of the cut position on the old leaves can control the number of new buds sprouting from the old wild rice stem clumps. The cut dead leaves should be centrally disposed of to reduce the source of pests and diseases. Third, apply sufficient organic fertilizer before the Spring Festival and apply nitrogen, phosphorus and potassium fertilizer well during the wild rice stem sprouting period.