Premature harvesting of walnuts can lead to a decline in yield

The walnut output depends mainly on the size of the nuts and the weight of the nuts. When the walnuts reach the ripening stage, the size of the fruit is basically shaped. There was no significant difference in the mean diameter, diameter, and diameter of walnut nuts of different harvesting periods. However, the early harvest of walnuts, the accumulation of internal dry matter, is still increasing. The survey data showed that at this time, the average daily weight of walnuts in the tree increased by 0.07 grams, and the later the harvest was within a certain period, the greater the weight gain. Harvesting can be increased by 10% for every 10 days before harvest. The single fruit weight before harvesting grew rapidly before August 25, and the increase in production was mainly before August 25. It can be seen that early harvest of walnuts will inevitably reduce production.

The closer the walnuts are to maturity, the richer the fruit, the increased nucleolus weight, and the increasing rate of kernels. The increase in single kernel weight of walnuts is mainly due to the increase in weight of walnut kernels. With appropriate delays in the harvested walnuts, the weight of the walnuts increased significantly, and the average daily weight gain was 18%. Tests showed that the weight of walnut kernels increased sharply with the delay of the harvesting period, and the increase was higher than the increase in the exiting kernel rate and plumpness.

Before August 25th, the walnut kernel weight increased by 13% or more every week. According to experiments conducted by the Beijing Institute of Forestry Research, as early as half a month after harvesting, the percentage of kernels and oil output dropped by 5-10%. The harvest period is postponed from August 28 to September 19. The oil content of walnut kernels can be increased by 80%. In Shangluo, Shaanxi Province, harvested before August 25, the nucleolus is thin and often empty grains or half benevolences, failing to meet commodity requirements.

Harvesting of walnuts will sooner or later affect the quality of walnuts. As early as harvested, walnuts are brown or darkly peeled, light and very astringent. Harvested from August 25th to September 1st, walnut kernels are yellowish brown or light brown, and their flavors are fragrant and slightly astringent. Harvested after September 1st, the walnut kernels are white-yellow, with a fragrant and crunchy flavor. The late-harvested walnuts have a high degree of ripeness. The green skin is cracked. It is easy to remove the green skin. The peeled surface is clean and beautiful, and it is easy to sell.

Most people in walnut production areas are afraid of losing walnuts, or are afraid that walnut harvesting will affect the breeding of wheat lately, or for walnuts to be sold at high prices in the morning. Walnut harvesting is generally early, and there is a habit of “shushu” playing walnuts, which is more suitable for walnuts. The harvest period is 10-15 days in advance. At present, there are still many places where walnuts are hit during the "summer heat." Walnut grab the morning market to sell high prices, although more money is sold, but the total output of walnut production is reduced a lot, the product quality is reduced, affecting the price drop, greatly affecting the total income, in fact, is worth the candle.

Sporadic walnut trees are not mature at the same time, and the walnut trees grown in pieces are more mature. In Sichuan, valleys, hills, and low-middle mountain areas, harvesting is preferred in early September, and high mountain areas are preferred in the first half of September. Walnuts ripen before and after the “White Dew” Festival, and it is advisable to postpone harvesting appropriately for a few days, and harvest them in batches in batches.

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