Grapes have the characteristics of easy flowering. In the long frost-free period in the south, full use of this characteristic of the grape can achieve two harvests per year. Zhangpu is located in the southern tip of Guilin City in the north of Guangxi Province. It is in the south subtropical zone and has a long frost-free period. It adopts the “two generations of the same church†cultivation mode to achieve mid- and late-maturing grape varieties that are harvested twice a year. mode). The fruit is being blossomed in late April. During the period of positive fruit growth, the first and second winter buds at the top of the main shoot are forced to promote secondary flowers and become secondary fruits in late May to mid-June. The secondary flowers usually bloom from late June to early July. From July onwards, one or two generations of fruit grow together. Ripening mid-mature varieties are ripening in mid-July, late-maturing varieties are making fruit mature in mid-August; middle-maturing fruits are ripe during National Day, late-maturing varieties two are ripening in late October, and fruit can be preserved by lifting New Year's Day Spring Festival. ! Technical points of operation:
First, the use of break sleep agent germination: in early February with 50% dicyandiamide 15-20 times buds can bud early and about 5 days and budding more neat. After using the bud-doping agent, buds must be promptly combined with water to promote budding and neatness.
Second, take the heart to promote flower bud formation: a flower before flowering about 1 week left about 10 buds around the main left (about 80cm) to pick up the heart, the main tip of the top after the first and second top left 4 ~ 6 leaves repeatedly topping, The next subtip leaves 1 to 2 leaves repeatedly topping.
Third, the use of growth inhibitors control shoot flower bud differentiation: 1, using paclobutrazol to control, after the main tip of the first picking, with 600PPM paclobutazole solution (15% paclobutrazol 1 g water 0.5 kg) soak the top 2 seconds, this way The purpose of the project is to suppress the growth of new shoots and promote fruit set, and to promote flower bud differentiation of secondary flowers. For varieties that are difficult to grow into flowers, such as Red Earth, Beauty Finger, Rizamat, and super stars, Dip 2-3 times, 7-10 days apart, to ensure that there are flower spikes in the winter buds. 2. Use Chlorotharcin to control the tip and promote flowering: When the new shoot grows to about 60cm, the new shoot for growth is 1500~2000mg/l (50% of chlormestat 1 to 30 pounds of water) soaking tip 1 to 3 seconds, on the one hand can inhibit the shoot shooter, on the other hand can promote the formation of secondary flowers. For cultivars that are more likely to form secondary flowers (Kyoho, Xiahe, Wenk, Victoria, Italy, etc.), one shot of 1500-2000 mg/litre of CMC is sprayed once when the young fruit is about 0.5 cm in diameter (in mid-May). The varieties that are more difficult to form secondary flowers, such as the beautiful ones, need to be sprayed again for 2-3 times of 1500-2000 mg/liter of CCC, each time between 5 and 7 days. Pay special attention to spraying only the leaves above the ear at the time of spraying CCC and that the amount of liquid to be sprayed cannot be too large (the principle of the leaves not to be driped). Try not to spray the liquid on the young fruit so as not to affect the normal fruit. Expanded in growth.
Fourth, timely cutting tips forced winter buds to issue secondary fruit: from late May to mid-June is the best time to cut the tip, and there is a week or so before the cut tip is the most ideal for a sunny day. After the main shoot is lignified and the first and second winter buds are full and full, all the shoots are cut and the first and second winter buds on the top are germinated. Generally, winter buds will have flowers after eruption. If there is no flower, leave 3 to 5 leaves for the winter buds to make them re-germinate the buds of the summer buds. The sprouts of the buds will often have flowers, such as the buds. No flowers can be repeated until the secondary flowers erupt.
V. Reasonably regulating primary and secondary fruit production: If the yield of fruit is too high, it will not only affect the quality of the fruit, but also affect the quality of the secondary fruit and cause the secondary fruit to be too small. Tree vigor. If the secondary fruit yield is too high, it will affect the coloration of the positive fruit, and it will also cause the secondary fruit to mature slowly and have poor quality. According to the production practice, the output of Kyoho per mu is controlled at 2000-2500 kg (red in 1500-2000 kg), and the yield of secondary fruit in 1000-1500 kg is appropriate. In view of the fact that the climatic conditions of Zhangpu's secondary fruit ripening season are close to the requirements for the production of high-quality grapes, such as the beauty finger and red earth, which are difficult to color fruit, the secondary fruit coloring is very good and the quality is also very good. In recent years, there have been individual fruit orchards that do not produce fruit and are specialized in producing secondary fruits.
Sixth, to strengthen fertilizer and water management and pest control: focus on the implementation of 2 times a year, germination fertilizer, 1 coloring fertilizer, 2 times the fruit fertilizer and 1 base fertilizer 6 times fertilizer. During the spring 10-15 days before germination, when the second flower was cut and promoted, the germination fertilizer was applied 1 time, and the compound fertilizer was applied to 25-35 and 10-15 kg per mu respectively. Before the beginning of coloring of fruit berries, the application of coloring fertilizer to 25 to 40 kg of potassium sulfate per mu, and the first and second fruit harvesting of each application of 1 pick of fruit fertilizer and 20 to 40 kg of compound fertilizer per acre. In mid-November Shiji Fei, applied per acre organic fertilizer such as decomposed livestock (avian) manure, bran cake 1000 ~ 2000kg, calcium magnesium phosphate fertilizer 50kg, open 30 ~ 50cm depth of the ditch applied fertilizer. In addition, according to the growth situation, combined with the use of pesticides to strengthen the foliage top dressing, foliar fertilizer can be used to love more income, integrated pest management, we must adhere to the "prevention-based, comprehensive prevention and control" plant protection policy. According to the occurrence of diseases and insect pests, the patients were given symptomatic medication and scientific medication.
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