Grape cutting seedlings can bear fruit in several years
As a perennial vine fruit tree, grape's cuttage propagation method can not only maintain the excellent characteristics of the female parent but also shorten the cultivation period. Mastering scientific cuttage management methods can not only harvest fruits in advance, but also ensure the sustained high yield ability of grape plants. This paper will systematically analyze the fruit cycle rules and key maintenance techniques of cuttage grapes. Time analysis of grape cutting seedling results Basic growth cycle Rule Conventional cutting seedlings need to go through a three-year growth cycle: the root system is cultivated in the first year, the tree shape is built in the second year, and the first fruit is achieved in the third year. Under the cultivation conditions of greenhouses and other facilities, through precise temperature control and nutritional management, fruit bearing can be achieved for 2 years. It should be noted that the yield per plant in the early fruit stage should be controlled at 1-1.5 kg to avoid excessive consumption of tree nutrients. Selecting high-quality cuttings with a diameter of more than 0.8 cm is the key factor in accelerating the results, and combining with rooting agent treatment can shorten the root cycle by 15 days. Using drip irrigation system to keep soil moisture between 60-70%, and combining amino acid water-soluble fertilizer to irrigate roots regularly can increase the annual growth of new shoots by 40%. Grape cutting seedling system management plan Collaborative management of water and fertilizer keeps the soil moist during germination period (water content 65%) and moderately controls water during flowering period (water content 50%). Adopt the "three-stage topdressing method": apply nitrogen and phosphate fertilizer (N-P ˇ O-K ˇ O=20-20-10) during the new shoot period, switch to high-potassium formula (15-5-30) during the fruit expansion period, and supplement 3-5kg of organic fertilizer per plant after fruit picking. Light control technology ensures 6 hours of scattered light every day during the seedling period, and adult plants require full sunshine. In summer, a 30% sunshade net is used to prevent sunburn, and in winter, a reflective film is used to increase the light intensity by 50%. Pay attention to keeping the light transmittance of the leaf curtain layer between 15-20% to ensure that the fruiting branches are fully exposed to light. The key points of tree cultivation are to adopt the "single arm with two arms" shaping method, and the height of the trunk is maintained at 80- 100 cm. When the new shoots grow to 30cm, the vines begin to be tied, and as a result, 8-10 buds remain on the parent branch and pruned. Renewal and pruning are carried out every winter, and 30% of new branches are retained as preparatory branches. Comprehensive prevention and control of pests and diseases focuses on controlling downy mildew and powdery mildew, and spray 5 Baume degrees of stone sulfur mixture to clear the garden before germination. Mancozeb and azoxystrobin were used alternately during the growth period, with an interval of 15-20 days. Physical control uses yellow boards to trap thrips, with 25-30 pieces hanging every 667㎡.
Through three years of systematic management, grape cuttings can enter a high-yield period, with a yield of 1,500 - 2,000 kilograms per mu. It is recommended that growers establish a management log to record phenological periods and farming operations, optimize cultivation plans based on local climate characteristics, and ultimately achieve the goal of high quality and high yield.