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Adjustable basal diameter grader for nursery stock

A technology for seedlings and instruments, applied in the field of seedling grading, can solve problems such as low work efficiency, high labor intensity, and cumbersome measurement, and achieve the effects of low cost, reduced labor intensity, and a wide range of measurement ranges.

Inactive Publication Date: 2011-05-18
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no effective method for grading the diameter of seedlings in China. The measurement work still relies on manual tools such as vernier calipers and meter rulers. Different degrees of misselection due to differences in attitudes

Method used

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  • Adjustable basal diameter grader for nursery stock
  • Adjustable basal diameter grader for nursery stock
  • Adjustable basal diameter grader for nursery stock

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Embodiment Construction

[0016] The present invention takes the two-year-old transplanted seedlings of Changbai larch as an example, with reference to the national nursery stock ground diameter classification standard, the grade I seedlings (qualified seedlings) of Changbai larch are > 5mm, the grade II seedlings (qualified seedlings) are 5 ~ 3.5mm, and the grade III seedlings (qualified seedlings) Grade seedlings (unqualified seedlings) are <3.5mm. The specific operation steps are:

[0017] First, fix the base on the horizontal surface to make it in a horizontal and stable state; then from low to high, at the adjustable end at 400mm and 600mm, adjust in turn according to the critical value of grade II and grade I of Changbai larch seedlings to make it The openings are 3.5mm and 5mm respectively; place the seedlings horizontally so that the ground diameter is at the position of the I-level defined hole (at 600mm), if the seedlings cannot pass through smoothly, then the seedlings are Class I seedlings,...

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Abstract

The invention relates to an adjustable basal diameter grader for nursery stock, which mainly comprises a bracket, three 100mm long fixed steel rods, three 300mm movable steel rods and three pore diameter adjusting nuts. In the invention, the nursery stock can be gradually graded by adjusting the size of the pore diameter through adjusting the tightness of the screw according to the grading standard for the basal diameter of the nursery stock, thereby improving the efficiency and accuracy rate of nursery stock grading. The adjustable basal diameter grader for nursery stock has low cost, is simple, ensures the accuracy rate of grading, reduces the labor intensity, and can be applied to the production and scientific research of the nursery stock.

Description

Technical field: [0001] The invention belongs to the field of forestry seedling cultivation, and specifically relates to seedling grading technology. According to critical values ​​of different seedling diameter grading standards, mechanical devices with different apertures are used to classify seedling diameters, thereby improving the speed and quality of seedling grading. Background technique: [0002] Forest tree seedlings are the basis of forestry production and construction, and their quality directly affects the success or failure of afforestation. Therefore, to ensure the smooth implementation of forestry projects and improve the survival rate of afforestation, it is particularly important to have high-quality and qualified afforestation seedlings. [0003] At present, my country mainly controls the quality of afforestation seedlings through seedling quality classification, which is a very important part before seedlings come out of the nursery. Seedling quality grad...

Claims

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Application Information

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IPC IPC(8): B07C7/04
Inventor 刘勇李国雷吕瑞恒卞斐康瑶瑶祝燕
Owner BEIJING FORESTRY UNIVERSITY