Two measures for arrangement of grape inflorescence

There are 300 to 1500 flowers in the grape inflorescence, and most of the flowers and fruits fall during the fruit setting period. Therefore, flower thinning of inflorescences retained on fruiting branches can enhance the development of remaining flowers. First, sparse inflorescences. To remove the whole inflorescence from the fruiting branch. When the plant load is large and the inflorescence is too much, the vegetable inflorescence is needed. Sparse the poorly developed weak flowers and inflorescences that are too densely distributed or improperly located, so as to concentrate the supply of nutrients on the fine inflorescences left behind. In addition to the total plant load, it also depends on the growth strength of fruiting branches. A strong fruiting branch bears two or more ears that can develop well and can be used as an excellent fruiting mother branch for the next year. On the other hand, the weak fruiting branch should not be used as the fruiting mother branch next year. According to the experience at home and abroad, for fresh food varieties such as rose fragrance and Jufeng, the principle of "one weak in Zhuang 2 does not stay" can be used as a reference for inflorescence thinning, that is, 2 ears can be retained for strong fruiting branches and 1 panicle for moderate fruiting branches. weak fruiting branches try not to leave inflorescences. Inflorescence thinning can be carried out in combination with bud removal, or on the basis of shoot removal, from pre-anthesis to flowering stage. From the point of view of conservation, it should be carried out as soon as possible. Second, pinch the tip of the ear and shape the inflorescence. It is generally achieved by pinching inflorescence tip and inflorescence shaping. It is usually not to remove individual flowers, but to remove all levels of rachis branches (spikelets) in inflorescence. Ear tip pinching and inflorescence shaping should be carried out within one week before flowering. If it is too late, the effect of promoting fruit setting is poor; too early, the inflorescence is not extended enough, and the shaping is not very convenient. The degree of pinching the ear tip is about 5% of the length of the inflorescence for rose fragrance and Jufeng. After pinching the ear tip, it not only achieved the purpose of removing some flowers, but also reduced the risk of soft tip or water pot disease at the ear tip.