"Yiyu" pears are of high quality, early fruits and high yields. In 2009, they passed the approval of the Hebei Provincial Forest Variety Approval Committee.
Characteristic characteristics
The crown is semicircular and the tree poses half open. Leaves are elliptic, dark green, flower buds conical, red-brown, with 6-8 flowers per inflorescence, corolla white, anthers light red. The fruit is oval in shape and has an average fruit weight of 260 grams. The fruit surface is green-yellow, with thick wax, thin skin, smooth and rust-free, and small fruit spots. White flesh, small fruit heart, crisp and delicate meat, rich juice, sweet and sour taste, and aromatic, less stone cells. The content of soluble solids was 12.3%, and the contents of total sugar, total acid, soluble sugar and vitamin C were 9.28%, 0.16%, 6.06%, and 25.6 mg/kg, respectively. Store at room temperature for more than 20 days.
In the Shijiazhuang region, this species germinated in mid-March and bloomed in mid-April. The fruit ripened from late August to early September, and leaves fall in early November. Strong tree vigor, moderate germination rate, medium branching ability, short fruit branch results, planting 2 to 3 years can be the result, fruit production period of 667 square meters (1 mu) can reach 2500 kg. Highly resistant to scab, field investigations did not find melasma and anthrax. The soil requirements are not strict, high temperature and humidity, no cracking occurs under drought conditions.
Cultivation techniques
The planting density is suitable for pollination varieties such as "Yaoli" and "early crown". The tree shape uses a single layer of heart or evacuation layered. The saplings need to be shaped, and the main branch opening angle should be 60~70, and the necessary branches should be retracted and updated. Young fruit spacing 20 ~ 25 cm, try to choose to retain the low order bit fruit (2 ~ 3 order); fruit bagging should use a single white wax bag or outer yellow white double bag. Basing on the use of autumn basal fertilizers, attention has been paid to the selection of highly effective and low-toxic agents for the prevention and treatment of diseases such as ring vein disease, pear hibiscus, yellowflies, and whiteflies.
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