1, pruning time
In order to make walnut trees bear more fruits after pruning, they can be pruned every spring. At this time, plants are in a transitional stage from dormancy to growth. Pruning will not affect the growth of walnut trees, but it can improve the growth speed of plants.
2. Pruning method
In the process of pruning, we should use sharp scissors to cut off the overgrown branches and dense branches of the walnut tree to improve the light transmittance and ventilation between plants, and then cut off the dry, yellow and poorly growing branches and leaves to help the walnut tree preserve nutrients.
3. Preventive measures
Pay attention to disinfection when pruning walnut trees. Disinfect the scissors before pruning, wipe the blade with alcohol wipes, and apply plant ash and carbendazim to the wound after pruning.
Variety classification
1, walnut: the stone is nearly spherical, sharp, with 8 longitudinal ridges, of which 2 are prominent, and the rest are not obvious, with wrinkles; Endocarp has a thick wall with irregular gaps and a thick diaphragm with two gaps. Produced in Nankou, Xiakou and northern Hebei in the suburbs of Beijing. Wood is hard and can be used as military materials.
2. Iron walnut: produced in Yunnan, Guizhou, western Sichuan and the middle and lower reaches of the Yarlung Zangbo River in Tibet. Born in hillside or valley forest at an altitude of1300-3300m. Yunnan is suitable for long-term cultivation, with high oil content, edible seeds and hard wood.
3. Hickory: produced in Zhejiang and Anhui. It is suitable for growing in sparse forests at the foothills or valleys rich in humus at an altitude of 400-1200m. Nuts are delicious, edible and used to extract oil. Their oil is fragrant and delicious, and it can also be used to prepare fake paint. The shell can be used to make activated carbon; Wood is tough and of high quality.