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NPK Nutrients Performance In Grape Growth
May 30, 2016


     1Nitrogen role in grape growth

       Nitrogen is a must to the amino acid and protein which is the key to form chlorophyll, alkaloid, and vitamin. Nitrogen could help the growth of leaves and twig. To grape, nitrogen could help develop more leaves to larger sizes and stronger twigs to receive more sunlight and finally raise large fruits. However nitrogen is easy to dissolved and lost in earth, so it is import to use by stages.

If extra nitrogen is given, the leaves and twigs will grow too fast and flowers & green fruits will be weakened. The fruits will not be as sweet as it should be. It is hard for grape to survive in winter after taking too much nitrogen. If it is not enough, the leaves will be small and tend to yellow. Twigs are too weak to support the fruits.  So it is right to give more nitrogen when grapes are to sprout and bloom.

2.Phosphate role in grape growth

Phosphate is to booster the respiration,  photosynthesis and carbohydrate transformation. Phosphate could help roots development, blossom bud growth and stock more sweetness in the fruits and reduce acid content. More phosphate could help grape survive in winter and more flavors in grape wine.

When phosphate is in shortage, grape leaves will be small and yellow,  and fruits will not be sweet or large. Leaves will fade first and then fallen earlier. Fruits will have thick shell and less sweetness. Of course extra phosphate will turn the leaves white and influence the use of nitrogen and Fe nutrient.

.Potassium play in grape fruit development

Potassium will not participate in the growth of leaves and twig but it is important to fruits growth, especially the carbohydrate development, transformation and delivery. Potassium of right amount is good to the grape leaves and twig development, especially to the growth of fruits. Grape is interested to potassium fertilizer, so it is called potassium plant to some extent. During its growth, potassium is a must.   

When potassium is lack, the carbohydrate i can not be produced n the leaves and more nitrate nitrogen will be accumulated in the leaves which will turn to yellow and withered. The new twigs will be long and slim, leaves thin with holes. Fruits are small of lower sweet level and bad color.  Extra potassium will harm the work of nitrogen and Meg work.