First, harvest

1. Harvest time. The appearance and morphological characteristics of mature walnut fruit are: the green skin turns yellow from green, and the top part is cracked, and the green peel is easy to peel. At this time, it is the best time for fruit harvesting. The middle and southern regions of our province generally mature in the early to mid-September period. At present, there is an early harvest phenomenon in production and attention should be paid to it.

2. Harvest method. Walnut harvesting generally adopts manual harvesting method and mechanical vibration harvesting method.

Artificial harvesting method: When the fruit is ripe, hit bamboo shoots or elastic wooden poles on the branches where the fruit is located or directly shoot down the fruit. The technical point of this law is that when it is struck, it should be carried out from the top to the bottom and from the inside to the outside, so as not to damage the shoots and affecting the yield for the following year.

Mechanical vibration harvesting method: Before harvesting 10-20 days, 500-2000ppm ethephon solution is sprayed on the tree to ripen, and then mechanically shake the trunk to shake the fruit to the ground. The advantage of this method is that the green peel is easy to peel off and the fruit surface is lightly polluted. However, the disadvantage is that ripening with ethephon solution tends to cause a large number of leaves to fall off early and weaken the tree potential.

Second, peeling

1. Stacking and peeling method. This method is our country's traditional walnut peeling method. The technical point is that the fruit should be transported to the outdoor cool place or room in time after harvesting, and should not be exposed to sunlight, and then piled at a thickness of about 50 cm (too thick and perishable). If a layer of hay or dry leaves with a thickness of about 10 cm is added to the fruit heap, the temperature in the heap can be increased, and the fruits can be cooked later, and the speed of peeling can be increased. Generally stacking 3-5 days, when the peel from the shell or cracking of more than 50%, you can use the stick percussion peeling. For unpeeled people, they can be stacked for several more days until they are fully peeled. Do not blacken, or even rot, the husks during stacking so as not to infiltrate the husks into the shells to contaminate the kernels and reduce the quality and value of the nuts.

2. Agent peeling method. Due to the long time of peeling by stacking and peeling method, low work efficiency and high fruit contamination rate, it has a great impact on the quality of nut products. Therefore, since the 1970s, some units have begun trials of ethephon solution ripening and peeling techniques. Yes: After the fruit is harvested, it is dipped in a concentration of 0.3%-0.5% ethephon solution for about half a minute, and then stacked in a shade or room at a thickness of about 50 cm at a temperature of 30°C and a relative humidity of 80%. Under -95% conditions, after 5 days, the peel rate can be as high as 95%. The duration of ethephon ripening and the concentration of drug used are related to fruit maturity. The fruit has high maturity, low drug concentration, and short ripening period.

Three, nut flush

After the walnuts have been peeled off, if the nuts are sold as a commodity, they should be washed with clear water to remove any rotten skin, dirt, and other contaminants that remain on the surface of the nuts. To improve the appearance of nuts and the value of goods.

Washing method: Put the peeled nuts into the basket, put the baskets in the sink, and stir it with a bamboo broom. Thin-skinned walnuts are not bleached to maintain their original flavor. Do nuts for seeding. Do not bleach after peeling. Store directly after drying.

High Quality Safety Belt

5 Point Safety Belt,Safety Harness Belt,Three Point Safety Belt,Full Body Harness Safety Belt

Shandong Binzhou Yong'an Labor Protection Factory , https://www.zhuqiangsafetybelt.com