How to make the grapes bear fruit several times a year?

How to make the grapes bear fruit several times a year? What technology can do that? The multiple fruiting techniques of grape in a year can be divided into two methods: method 1, using the secondary fruiting technique of winter buds twice a year to promote the secondary fruiting of winter buds on the branches of the same year. Due to the good differentiation of winter buds and flower buds, the yield and quality of secondary fruit can be guaranteed, so winter bud secondary shoots are often used in production to form twice a year fruit. When using the secondary fruit of winter buds, the key technique is to force and accelerate the differentiation and formation of flower buds in winter buds on branches in the same year. The second is to make the auxiliary shoots of winter buds germinate regularly and neatly so as to ensure the full maturity of the fruit in the same year. The main methods are as follows: (1) coring of the main shoot is carried out from the beginning of flowering to the early stage of flowering because the differentiation of inflorescences in winter buds on the branches of the same year has begun before flowering to the early stage of flowering. Therefore, when using winter buds for secondary fruiting, the coring of the main shoot is generally carried out when there are 4-6 leaves spreading above the inflorescence. The main purpose of this heart picking is to promote the concentration of tree nutrition in winter buds so as to promote flower bud differentiation more fully. (2) after the coring of the main shoot of the auxiliary shoot is removed, all the secondary shoots are removed so that nutrients are completely concentrated in the top 1-2 winter buds to promote winter bud germination ahead of time. If there is no inflorescence in the first germinating winter bud shoot, the winter bud accessory shoot can be cut off together with the tip of the main shoot to stimulate the winter bud germination with inflorescence under the branch. Because the winter bud develops for a long time, the inflorescence on the winter bud differentiation is better. The knot strength is also relatively strong. In production, in order to improve the quality of secondary shoots of winter buds, the secondary shoots are generally erased twice, the first time, the middle and lower secondary shoots are erased and the upper 1-2 secondary shoots are temporarily retained, and the 1-2 secondary shoots are left with 2-3 leaves for coring, and the 1-2 secondary shoots are removed about 10-15 days after the first secondary shoots are removed to promote winter buds. In this way, the auxiliary shoots of the newly extracted winter buds are not only neat and consistent, but also the inflorescences in the winter buds are large and robust, and the seed setting rate is also high. The time of winter bud germination can be controlled by controlling the time of cutting off the apical accessory shoots. Although postponing the time of winter bud germination can improve the strength of inflorescence, the late emergence of secondary branches of winter buds will directly affect the growth and ripening period of fruits. Therefore, it must be noted that the time of winter bud germination is not too late. In North China, the appropriate time for cutting off tip secondary shoots to force winter buds is from the end of May to the beginning of June. Other areas can be flexibly decided according to the specific local climate conditions. Method 2. Using the secondary fruiting technique of summer bud secondary shoots, due to the dormant period of summer buds, they germinate immediately, and it is easy to produce secondary summer shoots after primary summer shoot germination, which is easy to cause nutrition dispersion, and the quality of flower buds which is not easy to form or the formation of flower buds is not high. Therefore, when using the secondary fruit of the summer bud, it is necessary to ensure the good formation of the inflorescence in the summer bud, which is the technical key to the secondary fruit by using the secondary shoot of the summer bud. when using the secondary fruit of summer bud, the time of coring and erasing the secondary shoot is very strict. (1) coring of the main shoot: when using the secondary fruit of the secondary shoot, the coring of the summer bud must be picked in time to promote the formation of the flower bud before it germinates, so the time of coring should not be too late. Because the summer buds in the axillary nodes of 1-3 leaves above the main shoot of Eurasian varieties are easy to form flower buds, the time of coring of the main shoot for the purpose of promoting secondary fruit is about one week earlier than the general time of coring. At the same time, it should also be determined according to the specific environment of a region and the situation of flower bud formation of varieties, the key is to be carried out when there are 1 or 2 summer buds below the coring site, which must be paid attention to. (2) erase all the secondary shoots of summer buds: while the main shoots are coring, erase all the germinated summer buds on the main shoots, so that the tree nutrients are all concentrated in the top 1-2 ungerminated summer buds to promote the differentiation and formation of flower buds. Generally, after the coring of the main shoots, the apical summer buds can germinate in about 5 days, and a good summer bud inflorescence can be formed if the management is strengthened. (3) the accessory shoot with inflorescence should be coring at 2-3 leaves above the inflorescence in order to promote the normal growth of the inflorescence. (4) if the secondary tip of summer bud is induced to form without inflorescence, it is necessary to pick the heart again when spreading 4-5 leaves to promote the secondary secondary shoot to bear fruit, but it should be noted that there must be 1-2 unsprouted buds below the heart. Click to get more grape planting techniques click to get more fruit planting techniques