In the ecological environment, light, temperature, air, moisture, soil and so on have a direct impact on the walnut tree, which is an indispensable condition for the survival of the walnut tree. Walnut has strong adaptability and wide cultivation area. In the vast cultivation areas, the ecological conditions are obviously different. Varieties that have grown under certain ecological conditions for a long time can fully display their excellent characters and achieve good cultivation effects only under the same or similar conditions as the original environment. Of course, if the environmental conditions are far beyond, it is also possible to create environmental conditions suitable for the growth and development of this variety through artificial measures, but this requires more investment and increases production costs.

Cultivation and management techniques The production of high-quality walnuts has good varieties, and the site conditions of the planting area are also very good, which can only be said to have laid a good foundation for the future harvest. In order to ensure the normal growth of the plant, early bearing, multi-bearing, good bearing and high yield every year, and obtain better economic benefits, it mainly depends on whether the cultivation and management technical measures implemented in each stage of the growth and development of walnut trees are scientific and reasonable. Different technical measures and different management levels have different effects. To improve the management level of walnut cultivation, we must first improve the technical quality of cultivation managers. According to the different stages of the growth and development of walnut trees, scientific and reasonable management schemes were formulated in the aspects of soil, fertilizer and water management, plastic pruning, disease prevention and insect control, flower and fruit management, timely harvesting and post-harvest treatment, and all measures were ensured to be implemented. At the same time, in the process of implementing various technical measures, we should constantly collect new information, new technologies and new achievements of external walnut cultivation management, continuously improve the cultivation technology level of high-quality walnut production, and obtain higher economic benefits.