When will the southern grape be transplanted?
As an important cash crop in the southern region, the choice of transplanting timing directly affects the survival rate and later yield. This paper will systematically analyze the golden time window for grape transplanting, and deeply analyze the key elements of growth recovery after transplanting, helping growers master the complete technical chain from soil preparation to new bud germination. 1. Prime time for grape transplanting 1. The phenological period and temperature coordinate with each other. When the ground temperature steadily rises to 8-10℃ around the vernal equinox (February to March), the grape root system enters an active period. Transplanting at this time can minimize the loss of tree sap and use the nutrients stored during the plant's dormant period to accelerate wound healing, which is in line with the horticultural principle of "transplanting in the early stage of injury." 2. The soil thawing characteristics select the period when the soil is completely thawed but has not returned to salt, and match the stable climate window with an average daily temperature of 10-15℃. Transplanting too early is prone to cold spring, and too late will hinder the development of new roots, which affects nutrient absorption efficiency. 2. Scientific transplanting operation system 1. The optimal substrate configuration uses a mixed substrate of 60% sandy loam soil +30% humus soil +10% perlite, and the pH value is controlled within the range of 6.0-7.5. The soil was deeply plowed (depth 40-50cm) 15 days before transplanting, and 3 tons of decomposed organic fertilizer +50kg of calcium superphosphate were applied to each mu. 2. Root treatment specifications select strong seedlings with a diameter of 0.8- 1.2 cm and a main root length of ≥25cm. Keep root balls with a diameter of 15cm when rising and moisturize with moss during transportation. The diameter of the planting hole should be twice that of the root ball, and the "three stepping and two lifting" compaction method should be implemented after burying the soil. 3. Growth monitoring after transplanting 1. Under standardized operation, the germination cycle of new buds is under 15-20 days. If there is a "false living" phenomenon (wither after spreading leaves), it is mostly caused by excessive roots injury or soil hardening during transplanting. It is recommended to use 0.1% indolebutyric acid solution to irrigate roots to promote root regeneration. 2. Slow seedling management Keep the soil moisture at 60-70% within 30 days after germination, and build a 50% sunshade net to avoid strong light burns. When the new shoot length reaches 15cm, start applying balanced water-soluble fertilizer (N-P-K=20-20-20), and the concentration is controlled at 800-1000 times.
By accurately grasping the transplanting timing, standardizing operating procedures and scientific post-management, the survival rate of grape transplanting can be achieved of ≥95%. It is recommended that growers establish a transplanting log to record the entire process of data from seedling lifting to lignification of new shoots to provide a basis for optimizing cultivation plans.