The key to the quality of grape seedlings lies in the management of summer and autumn. 1. Branch management 1. Wipe branches. Generally speaking, the new shoots of grape seedlings grown by cutting seedlings grow to 40-50 cm in early and mid-July. Among them, there will be several seedlings with several new shoots or one new shoot with several auxiliary shoots. This kind of seedlings is difficult to grow strong. seedling. For nurseries with a higher density, the branches must be wiped in time, leaving a strong new shoot, and all the other new shoots or auxiliary shoots (branches) shall be wiped off. 2. Topping. When the new shoots of the grape seedlings grow to about 50 cm, remove 10 to 15 cm. All the secondary shoots that occurred after topping were erased except for the top one. When the top accessory shoot grows to 5 to 6 leaves, leave 2 to 3 leaves to be topped. All the regenerated secondary shoots on the secondary shoots are erased. 3. Tie up. For some high-end grape varieties, if you want to grow more stalks, the new shoots on the seedlings can be placed at 1 to 1.5 meters, and such seedlings must be tied. There are two methods: the first one, you can insert a bamboo pole every 3 to 4 meters between the rows of seedlings every 2 rows, and pull on the thin iron wire or nylon rope 2 to 3 times. Pull a cable at each end of the bamboo pole. Tie the two seedlings to the iron wire or nylon rope between the bamboo poles. Second, if the seedlings are sparsely planted, each seedling can have one bamboo stalk, and the new shoots of the seedlings can be tied to the bamboo stalk to grow. The upper ends of the bamboo poles are connected with cross bars to prevent wind blowing or people knocking down. 2. Soil, Fertilizer and Water Management 1. Fertilize. When the seedlings grow to 7-8 leaves, 15-20 kilograms of urea per mu is sprayed, and then applied again after 15 days, usually 3 times. Combine spray with 0.5% urea solution in summer and 0.3% potassium dihydrogen phosphate solution in autumn, spray twice each. 2. Water in time. Before the grape cuttings germinate, they are generally watered every 7 days. After the new shoot grows to 10-20 cm, water it every half month. If it rains and the moisture content is better, don't water it. When the seedlings grow to 50 cm, properly control watering. If the seedlings do not leave the nursery before winter, be sure to pour the winter water well. Each top dressing should be watered immediately. 3. Cultivation and weeding. Most of the nursery borders are covered with mulch, and it is generally not necessary to plough the weeds. The ridge and both sides should be hoeed to protect the moisture after each watering, and weeds should be removed at the same time. Three, pest control The main diseases controlled are downy mildew and black pox; the main pests controlled are cotton bollworm, beet armyworm and grape hawk moth. When the seedling grows to 7-8 leaves, spray 50% carbendazim 500 times solution once, and spray 80% 600-800 times solution once half a month later. After the seedlings are topped, spray 1:0.7:200 times Bordeaux mixture once. If downy mildew is found, spray 78% Kebo 600 times liquid or 80% ethyl phosphine aluminum 300 to 500 times liquid once. In autumn, the leaves have been aging, and the growth of new shoots has basically stopped. At this time, 1:1:180 times or 1:1.5:180 Bordeaux mixture is the main solution. In the season when pests occur, just add anti-fungal drugs when spraying the bactericide. Grape hawk moth can be controlled with 1000-1500 times solution of dichlorvos; for cotton bollworm and beet armyworm, 1000-1500 times solution of Longwei 1 can be used for control. 4. Variety purity management When the new shoots grow to 7 to 8 leaves, the new shoots and young leaves are easy to identify. After recognizing the miscellaneous seedlings, pull them out by roots. If there are several varieties in a large area of ​​the nursery, they should be inserted between the different varieties with the mark on the bamboo sheet, and then tied with a plastic rope loop. The variety file should be established, and the plan of the nursery should be drawn and marked. The location and number of seedlings of each species. Five, leave the nursery at the right time Grape seedlings should not leave the nursery immediately after deciduous leaves. At this time, it is the process that nutrients continue to be stored in the roots. Generally speaking, it is more appropriate to leave the nursery before and after the Xiaoxue solar term. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone Hyaluronic Acid Solution,Medical Soothing Dressing,Medical Wound Dressing,Sterile Non-Woven Dressing Changzhou Timerein Biotechnology Co. , Ltd. , https://www.timereinbiotech.com
The summer and autumn management of the grape nursery is critical