On the surface, the reason is caused by overproduction. For example, Shangluo City used to be the main producing area of walnuts in China, and President Mao Zedong wrote an inscription "One liter of walnuts per household" to encourage Shangluo City to vigorously develop walnuts. Since returning farmland to forests, walnut trees have been planted in almost all the farmland to forests in Shangluo City. Except for some plots that are not suitable for planting walnuts, the total output has doubled after more than ten years, which is the main reason for the decline in walnut prices.
From another perspective, the quality of walnut products is the most important. Walnut varieties in Shangluo are basically old varieties, and some are not even grafted. The variety and quality of walnut are seriously differentiated. There are many thick-skinned walnuts and stuffed walnuts, and some walnuts are very small, which has caused the rejection of this kind of walnuts by individuals and enterprises processing walnuts.
Some walnuts are from other places with good quality, mostly thin-skinned walnuts and paper-skinned walnuts. However, many varieties are not suitable for this place or some plots and cannot be ripened normally. Nuts are not full, with heavy astringency, low oil yield and poor taste. Nobody wants to sell green walnuts and fresh walnuts. This is the failure caused by improper variety selection.
The third reason is caused by improper cultivation. Walnut needs fertile soil, and poor land does not grow well, which not only can't blossom and bear fruit normally, but also has serious flower and fruit drop, and its yield is extremely low, with an average yield of 5-50 kg per mu.
Some people don't dig deep holes in walnuts. Walnut lacks organic nutrition, its roots are difficult to tie, its growth and development are hindered, and its plant type is poor, which can not meet the basic requirements of high-yield industrial parks. Some people do not pay attention to walnut pruning and water and fertilizer management, and let it grow, with low yield and low pure benefit.
Serious pests and diseases such as walnut black eggs lead to falling flowers and fruits, and the growth potential is weakened. In particular, because of the large planting area and large population base, walnut dwarf disease is getting more and more serious year by year, and some plots have almost no output for many years, but I don't know the specific reasons, and it is all due to the weather.
Farmers who make money choose good plots and varieties, dig deep pits, plant grafted high-quality seedlings, carry out necessary shaping and pruning every year, cultivate good skeletons, strictly follow the standards of industrial park construction, strengthen water and fertilizer management and pest control, and the output is extremely high.
This kind of people will choose to sell green walnuts and process walnuts, and the rest will be processed into walnut oil, which can achieve higher economic benefits. In particular, green walnuts can be sold for more than 10 yuan per catty, and high-quality walnuts can also be sold for dozens of pieces per catty. Every Mid-Autumn Festival, processing enterprises book in advance and come to purchase. Those broken walnuts and black walnuts are carefully processed into high-quality walnut oil, which is the main ceremony of the producing area.