For example, 5-6 days before flowering, 6-7 leaves should be left on the inflorescence for coring, and at the same time, the auxiliary branches under the ear should be erased. However, for the over-grown varieties such as Red Globe and Meirenzhi, the terminal bud 1 ~ 2 secondary shoots can be retained after the main shoot is enucleated, 4 ~ 5 leaves are enucleated repeatedly, and all the secondary shoots below the inflorescence are erased at the same time, which is beneficial to induce secondary fruits.
Kyoho grape is one of the main varieties planted in grape production, and it is planted all over China. Kyoho grape also has the characteristics of strong adaptability, disease resistance and cold resistance, and is favored by fruit farmers. So how to plant Kyoho grapes, and what are the planting methods and precautions of Kyoho grapes?
Key points of cultivation techniques of Kyoho grape
If the cultivation is not timely, the flowers and fruits will drop seriously. Improving the fruit setting rate in cultivation is the key to success.
1, when the diameter of new shoots exceeds 1.5cm, it is difficult to form flower buds and poor fruit setting, so the application of nitrogen fertilizer should be controlled first to prevent excessive growth of trees;
2. Pick fruit branches before flowering. Picking should not be too heavy or too light. Too heavy is easy to produce large and small grains, and too light will not improve the fruit setting rate. It is advisable to leave 5 leaves on the ear.
3. Inflorescence shaping, that is, removing 2-4 small branches from the secondary panicle and the inflorescence base, pinching off the tip of 2-3cm, and leaving only the middle section of 7-8cm, which can concentrate the nutrition supply at flowering stage, improve the fruit setting rate and make the fruit panicle compact;
4, fruit thinning, appropriate fruit thinning after fruit setting, thinning small grains and fruit grains inside the ear, leaving 40-50 fruits per ear.
Management Techniques of Jufeng Grape Planting
1, timely germination, reasonable pruning.
In the encyclopedia of Kyoho grape planting technology, after the grapes germinate in spring, the heavy buds and small buds should be erased as soon as possible, and the strong buds should be kept. Before flowering, the main shoot should be stoned 2 ~ 3 times in time, and the secondary shoot should be erased, so that more nutrients can be transported to the parts of the flower organs, and at the same time, some inflorescences should be properly thinned, and the 1/4 ~ 1/5 at the end of the inflorescence should be pinched off 3 ~ 5 days before flowering, so that the nutrients can be supplied to the remaining fruit grains in a centralized way.
Pruning medium and long branches in winter, it is appropriate to leave new branches 10 ~ 15 per square meter, staggered up and down, to ensure the growth of grapes per spike to 15 ~ 25 leaves, and the yield per mu is controlled within 2500 kg. This can make the ear compact, the fruit grains neat and mature, and improve the flavor and color of berries.
2. Strengthen fertilizer and water management to prevent premature aging of trees.
In the encyclopedia of Kyoho grape planting technology, Kyoho grape has strong growth potential and requires high fertilizer and water conditions. But irrigation should be appropriate, especially 20 days before 15 ~ picking. In order to control the amount of nitrogen fertilizer and increase the amount of phosphorus and potassium fertilizer, "Woye high potassium water-soluble fertilizer" can be selected. In vineyards that begin to bear a lot of fruit, we should pay attention to increasing fertilizer, keeping the trees vigorous and prolonging the full fruit period.
Water: water the grapes once after they are unearthed in spring. If the soil is not too dry before flowering, try not to water the flowers after withering, and the fruits enter the period of rapid expansion, which is the period when water is most needed, so water them once every 10 day. When the fruit particles begin to change color, stop watering to improve the soluble solid content of the fruit. Before burying the soil in winter, water the grapes once with big water to ensure the grapes to survive the winter safely.
3. Measures to improve the fruit setting rate of Kyoho grape.
Falling flowers and fruits is a common problem in Kyoho grape production. The main reasons are the poor development of flower organs, inability to pollinate and fertilize normally, bad climatic conditions during flowering and malnutrition of trees. The following technical measures should be taken in production to improve the fruit setting rate of Kyoho grape.