Grading and packaging of the hottest pear seedling

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Pear seedling grading and packaging

pear seedling grading

1 Specification for pear seedling out of the nursery

(1) the main root and lateral root of the root system are complete, with more than 3 evenly distributed, stretched and non curled lateral roots. The length of lateral root is more than 20 cm

(2) the height of branches is more than 0.8 ~ 1.3m, and the coarseness at 10cm above the junction is not less than 0.8cm

(3) there are more than 6 contiguous, robust and plump buds in the branch segment from 45 to 90 cm above the bud grafting interface. If there are secondary shoots in the plastic belt, there should be robust buds on the secondary shoots

(4) the interface is completely healed. The dye should be driven by scientific and technological innovation, and the interface is smooth

2. Grading standard

(1) grade I seedlings: the height of the seedlings is more than 1m, the lateral roots are at least 3, and the length is more than 20cm; There were 6 ~ 8 full buds in the plastic zone; The diameter of stem 10 cm above the interface was 1 cm, and the interface was completely healed

(2) secondary seedling: the seedling height is more than 30cm, 3 lateral roots, and the length is 15 ~ 18cm; There were 6 ~ 8 full buds in the plastic zone; The stem diameter at 10 cm above the interface was more than 0.8 cm, and the interface was completely healed

(3) grade III seedlings: those that do not meet the requirements of grade I and II and have a height of more than 80cm are grade III seedlings, which are not allowed to leave the nursery according to the regulations

packaging of pear seedlings for long-distance transportation

protecting the root system, preventing water loss of seedlings and damage during transportation are the central links of long-distance transportation of pear seedlings, and proper packaging is the first step

seedlings should be packed as soon as possible after leaving the nursery. First grade the seedlings according to the standard, and then bundle them according to the grade, one bundle for every 50 or 100 plants When baling, the root ends shall be aligned, and a straw rope shall be tied near the root and 1/3 of the upper part of the seedlings to tie the seedlings tightly. Dip the root part in the prepared yellow mud to make the root covered with mud Then put the root end of the bundle of seedlings into a cattail bag (gunny bag, textile bag, etc.), close to the cattail bag and lined with a plastic bag or a large piece of plastic cloth, fill the surrounding with wet grass, surround all the roots with grass, and finally tie the bag mouth with rope. In order to prevent the loss of water in the dried part of the seedling, it is best to wrap it tightly with plastic cloth. In order to save money, it is not necessary to wrap them separately. Before loading, the carriage is lined with large plastic cloth, and then the bundles of seedlings are discharged into the carriage. Finally, the plastic cloth around is lifted and covered on the seedlings, which is tightly covered with tarpaulins, which can not only effectively maintain moisture, but also reduce wind damage during transportation

false planting

false planting refers to that the seedlings that cannot be planted temporarily need to be buried with soil for moisturizing and root protection, and the false planting can be dug out after consulting and planting for the development direction of aluminum industry in the base

(1) false value: select the leeward and sunny place to excavate the artificial planting ditch, with a depth of 50 cm and a width of about 100 cm. The ditch runs from east to west, and the length is determined by the number of seedlings. The excavated soil shall be placed in the north of the trench, and experienced mechanical and electrical personnel shall be sent to the user's factory to be responsible for the installation, commissioning and trial production of the equipment. The trench shall be dug to loosen the soil at the bottom of the trench

(2) the seedlings shall be arranged from one end, the seedlings shall be placed obliquely, and the bundled seedlings shall be scattered and discharged individually. It is better to spread the seedlings like holding onions, then bury the root system with soil, and then put them in another row until they reach the other end of the planting ditch

(3) the root system of the seedlings shall be completely filled with soil, and there shall be no gap or air ventilation supported by soil blocks. Therefore, the filled soil must be broken

(4) water after planting to make the soil closely connected with the root system. If there is a leak after water seepage, it needs to be sealed with fine soil. In winter, with the temperature gradually decreasing, the soil layer is continuously thickened. When the severe cold comes, the buried depth reaches 1/3 of the seedling height. Operate the impact tester ~ 1/2

(5) Note: the artificial planting ditch should not be too deep; The seedlings in the ditch shall be arranged neatly, and the root penetration depth shall be basically the same. Otherwise, the upper seedlings will be buried too shallow and the root system will be frozen; The lower seedlings are buried too deep, and rotten roots appear due to excessive humidity and overheating

source: Food partner

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