Influence of the application of irrigated water-soluble calcium fertilizer on wine grape properties

Abstract

The eastern foot of Helan mountain is a famous production area of high-end wine grapes in China. Excessive application of NPK fertilizer induced deficiency in trace elements, such as calcium, and seriously affected the properties of wine grapes. A vineyard in the eastern foot of Helan mountain was selected to investigate the influence of five different concentration treatments of 15 (T 1 ), 30 (T 2 ), 45 (T 3 ), 60 (T 4 ), and 75 (T 5 ) kg·ha -1 of water-soluble calcium fertilizer (Ca(NO 3 ) 2 ·4H 2 O) application on grape calcium content, yield and fruit properties. The application of calcium fertilizer significantly increased the calcium content in leaves but reduced that in stems and fruits. The highest grape production of 6560.83 kg·ha -1 was achieved at T 5 calcium fertilizer application, corresponding to increase of 30.92% than that for the control (CK, normal fertilization) treatment. The minimum titratable acid of 4.63 g·L -1 in grapes was detected at T 2 calcium fertilizer application, which was 16.38% lower than CK, however, 13.40% increase in sugar-to-acid ratio was observed at T 2 . At 45 kg·ha -1 calcium fertilizer concentration, the anthocyanins content was 6.47 mg·L -1 , indicating an increase of 53.23% than CK. This study showed that the optimal calcium fertilizer concentration was 30 kg·ha -1 with the lowest °Brix, titratable acidity, anthocyanins, the highest total phenols, reducing sugar, sugar-to-acid ratio, and an acceptable concentration of the soluble sugar and tannins.

Foliar application of chelated sugar alcohol calcium fertilizer for regulating the growth and quality of wine grapes

“…Therefore, calcium supplementation is an important measure to improve fruit quality [28] . This study shows that foliar application of calcium sugar alcohols can increase the particle size, hundred-grain weight, and yield of wine grapes, which is similar to the results of Wang et al [8] The increase in diameter, hundred-grain weight, and yield reached 2.66%-21.97%, 2.59%-63.08%, and 10.25%-30.72%, respectively. Zhang et al [26] concluded that the application of calcium fertilizer increases the soluble solids in wine grapes and improves the sugar-acid ratio.…”

“…Because plant roots absorb nutrients from the soil and transport them to other organs, it has been found that supplementing calcium fertilizers by irrigation or soil fertilization has achieved good results on a variety of fruit trees. Wang et al [8] showed that the titratable acidity, anthocyanin, and total phenolic content of grape berries were significantly increased after drip irrigation with Ca(NO 3 ) 2 •4H 2 O at a concentration of 3.0 kg/hm 2 . At this dose, it effectively prevented grape cracking, inhibited cell wall disintegration, promoted cell wall strengthening [9] , and prolonged the effective storage time of grapes after harvesting [10] .…”

Effects of foliar iron spraying on Cabernet Sauvignon phenolic acids and proanthocyanidins

“…The content of soluble solids was determined by hand-held sugar meter; the content of reducing sugar was determined by 3,5-dinitrosalicylic acid method; the content of titratable acid was determined by standard 0.1 mol/L NaOH (end point pH 8.2) (Jin et al, 2016;Ma et al, 2019;Wang et al, 2019).…”

Meloidogyne incognita population control and nutritional status and productivity of Thompson seedless grapevines managed with different treatments

“…Although grapevine growth requires microelements in small amounts, these nutrients may significantly affect grape properties [26]. It was informed that calcium plays an important role in cell division, as well as in the growth and development of fruit trees [27].…”

“…According to Couto et al [25], boron application controlled M. incognita population. Another important plant nutrient is calcium, which is considered a structural component of plant cell walls [26] and the development and structural integrity of plant membranes [27]. It was reported that the shortage of calcium in the soil affects plant structures and make plants less resistant to nematode infections [28].…”