Walnuts

Walnut walnuts belong to deciduous trees. Also known as walnuts, twirles, or pecans. Walnut genus about 20 species, distributed in the northern temper zone, China has 5 kinds of 1 variant.

up to 25 meters high and has a chest diameter of 80 centimeters. Small branches are thick, myelin is flaky separated, and young branches are dense with aden hair. Odd plume-like compound leaves, mutual birth, small leaves 9 to 17, oval or egg-shaped oval, jagged edges. Flower mono sex, male and female, male flowers for sagging flower sequence□ 4 to 10 into a spike-shaped, upright. Nuclear fruit, near-egg-shaped, first tip, fruit nucleus long egg-shaped, first-end sharp tip, with 8 vertical ridges, with irregular deep grooves in the middle.in China is mainly distributed in Xiaoxing Anling, the Enda Mountains, Changbai Mountain and eastern Liaoning, most scattered at an altitude of 300 to 800 meters on both sides of the ravine and mountains, with other tree species to form mixed forests. There are also small distributions in the southeast of Daxing Anling Forest and Hebei, Henan, Shanxi and Gansu. The Far East of the Soviet Union and northern North Korea are also produced. Happy light. It is more resistant to cold, but it is easy to cause dry ends when the dry wind blows. Suitable for deep humus, moist, well-drained valleys or hillsides. It grows faster. Natural forests began to be strong in about 20 years, and the fruit was ripe from August to September. Seeds reproduce or are updated with germination. Planting and live afforestation are available, but due to the developed seedling root system, the main root is deep and long, the transplant is prone to injury and the main root, while the seed germination rate is high, the current use of live afforestation. The germination is strong, the root often germinates out a lot of germination strip, grows well, if appropriate measures are taken, timely selection of the germination strip, can reach the purpose of renewal. The main diseases are dry branch diseases. Pests have walnut cross-groove elephant, walnut elephant, walnut saddle elephant for the harmful fruit, root neck, walnut limbs for the harmful fruit.

material hard and durable, texture beautiful, for military and fine work precious materials. The oil content of the species is 40 to 63%, the nutrition is rich, the oil can be squeezed, and the fruit shell can make activated carbon. The bark contains channing, which can beglue. This kind is commonly used to graft walnut birch.