Several Grape Varieties: Fruit and Leaf Description
In the field of grape cultivation and appreciation, accurately identifying varietal characteristics is a key skill. This article provides growers with an intuitive method for varietal identification by comparing the fruit shape, leaf characteristics, and growth performance of four distinctive grape varieties.
Key Points for Identifying Distinctive Grape Varieties
Analysis of Hongru Grape Characteristics
The fruit cluster is compact and conical, with a single fruit diameter of about 2.3 cm and a sugar content that can reach 22%. During maturation, the skin shows a gradual color change: initially pink, turning to purple when fully ripe. The leaves are palmately lobed with five lobes, the upper lobe reaching 2/3 of the leaf length, veins are prominent, and the density of pubescence on the back is about 150 hairs/cm², which gives it strong drought resistance.
Characteristics of Zuijinxiang Grape
The average weight of the berries is 13.5 grams, with the largest reaching 18 grams, and they are inverted ovate in shape. The golden yellow skin is 0.8-1.2 mm thick, with a juice yield of 78%. The leaves are typically heart-shaped, with a length-to-width ratio of 1:0.9 for mature leaves, a surface concavity of 0.5 mm, and a pubescence layer thickness of about 0.3 mm on the back, which effectively reduces the invasion of diseases and pests.
Growth Characteristics of Xiaye Grape
A seedless variety representative, with a fruit powder thickness of 0.15 mm and a skin color that changes from blue-black to jet-black. Young leaves have a light purple edge, and mature leaves are明显 leathery, with a surface glossiness of 75GU (gloss units), making it suitable for cultivation in rainy southern regions.
Morphological Identification of Jinzhihi Grape
The fruit shape is unique,弓状弯曲, with a length of 3.2-4.5 cm and a powder coverage rate of over 95%. Young leaves are densely covered with white pubescence (density 200 hairs/cm²), mature leaves have sawtooth angles of 45-60 degrees, and the petiole-leaf junction has a distinct purple-red spot, which is an important identifier for this variety.
By systematically observing elements such as cluster shape, skin characteristics, and leaf structure, different grape varieties can be accurately distinguished. It is recommended that growers, considering regional climate characteristics, focus on factors such as the fruit-to-leaf ratio (ideal value of 1:35) and the density of leaf pubescence, and select suitable varieties for cultivation. Regular microscopic observation of leaves (recommended magnification of 40-100 times) can provide more precise control over the growth state of the varieties.