In southern China, Japanese sweet persimmons are best served in autumn (from October to mid-to-late November). In order to guide fruit farmers to purchase seedlings, the identification method of Japanese sweet persimmon is now described as follows.
I. Identification of sweet persimmon seedlings and astringent persimmon seedlings. The leaves of sweet persimmon seedlings are flat or upright, with a slight brilliance; the internodes are shorter, the junctions are not obvious in twists and turns, and the seedlings are relatively straight; the lenticels are numerous and obvious. Astringent persimmon leaves are drooping, and the leaves have a leather-like luster; internodes are longer, and the tortuosity is evident at each node, and the lenticels are few and not obvious. Persimmon seedlings grow moderately, with shorter plants, more branches, and mostly brown or reddish-brown skin. Astringent persimmon seedlings grow strongly, stand upright, have few branches, and their skin color is mostly pale gray or dark gray.
Second, the difference between the seedlings of persimmon varieties. Jiro, Maekawa Jiro, and Aki Jiro are tender yellow leaves with no red color. Among them, the Jiro and Kenzagawa Jiro are more curved, the skin is flat, the hand feels a sense of flannel, the lateral view of the bud is triangular, scales without edges; leaf edge wavy, deep veins. Rich, early-born Matsumoto, early-to-early West and other rich varieties of leaves are yellow-green, not reddish. Among them, the rich, early pine leaves were spoon-shaped, curved internodes, large and obvious skin, reddish, rough feel, lateral buds are triangular, but the scales are ribbed. Izu, Hanabori, Nishimura early life (incomplete persimmon) young leaves reddish-brown, petiole with red. Among them, Izu leaves are large, oval, with slight inflections on both sides and pale yellow backs. The early leaves of the flower garden and Nishimura were small and oval, with both sides folded into grooves and white hairs on the back of the leaves. Among them, the flower Royal Foliage straight edge; West Village primate edge wavy, branch gray yellow, buds developed, leaf marks concave. Red persimmon (not completely persimmon), Zen temple pill (not completely persimmon), and the young leaves of the Suruga River are red-brown, but the petioles are not reddish. Among them, the red persimmon leaves are long-oval and pale yellow; the temple leaf is long and oval, with small leaves, dark green color, with slight inflections on both sides, short internodes, non-convex skin, long leaves, and purple leaves before leaves fall. Red, white leaves, buds flat; Suruga leaves oval, large leaves, dark green leaves, both sides into the ditch into a trench, the tree vigor is stronger, saplings stand upright, branches short, branches Less, clear skin.
Third, rootstock identification of rootstocks. At present, many Japanese sweet persimmons use Junqinzi (soft dates) anvil and cultivated persimmon and wild persimmon tea anvils. Junqin anvil root system is shallow, lateral roots and fibrous roots developed, and therefore, more drought-resistant, more resistant to thin, and strong cold tolerance, and astringent persimmon and some persimmon varieties graft affinity is better, but with some persimmon varieties (especially Rich lineages) poor graft affinity, so these varieties can not use Junqianzi as rootstock, but to use common anion grafted seedlings. The cultivated persimmon or wild persimmon was used as a co-stockstock. The main persimmon varieties had strong grafting affinity and were more tolerant to moisture, but the cold resistance was weak. In addition, the main roots of the common anvil were well developed, but the lateral roots and fibrous roots were few, and the seedlings were slow after transplanting. , The survival rate is low. In the north of the Yangtze River, the common anvil is usually used, while the common anvil is commonly used in the Yangtze River basin and its persimmon production area south of the Yangtze River. Therefore, it is necessary to choose rootstocks according to different varieties and different climatic conditions. Rootstock root identification method: cut the root after the cut off was light yellow, slow discoloration of the common anvil; and the cut-off is dark brown, fast discoloration is the king to relocate the anvil. In addition, the roots were chopped and soaked in water. The leachate was yellow and the anvil was dark, and the dark brown was a common anvil.
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