Boron is a trace element that can promote the germination and growth of grape pollen tubes, promote pollination and fertilization, increase fruit set rate, reduce seedless fruit, increase yield, promote the formation of aromatic substances, increase sugar content, and improve berry quality. At the same time, boron can promote the growth of new shoots and inflorescences, so that the new shoots mature well.
The symptoms of grape borage deficiency are mainly due to the shorter internodes, short stature, and weak growth of the secondary shoots; the leaves are markedly thicker, thicker, brittle, shrunken, outwardly bent, and the leaf margins appear to be missing. Green yellow spots, severe leaf margin irritability; particularly evident when the flowering corolla does not fall off or fall seriously, inflorescence shrinkage, poor fruiting; fruit seeds on the head of no small grain increased, the formation of a clear pearl grain ear type. In addition, the boron-deficient plants have a shallow root distribution and even cause dead roots.
The occurrence of boron deficiency in grapes is related to soil structure and organic fertilizer application. The lack of boron in the vineyards on sandy beaches and areas with poor ventilation and heavy soils is more serious. In areas that are too dry and where there is little irrigation, the number of strains with a deficiency of boron is also significantly increased, especially when the soil is too dry around the flowering period.
?? Prevention methods
1, spray boron on the surface. Two 0.1%-0.3% borax (or boric acid) solutions were sprayed consecutively before flowering and flowering. The symptoms of boron deficiency subsided significantly, and the fruit setting rate and fruit quality increased significantly.
2, soil boron. Generally in the vineyard where the diseased plant exceeds 10% or more, based on the organic fertilizer applied in the fall, the diseased plant relies on adding 50 grams of borax to supplement the deficiency of boron.
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