In agricultural breeding work, seeds need to be divided into several grams to several tens of grams in experimental fields, distribution and regional experiments, and breeding. Because of control varieties and trial and error, the species of plants are often in the millions. A manual call on the balance, bagging, this one 2 people need to do the whole winter. Work, work, time, and common mistakes.
According to the characteristics and requirements of seed sampling, in 1983 we successfully developed a ZzDF-type seed equalizer and passed the technical appraisal in May of the same year. The structure of the sampler is shown in the figure. When working, the seed to be divided is first held in the funnel, and the pressure of the funnel is lifted by the hand. The seed forms an annular gap formed between the funnel and the tip of the distributor and flows along the cone toward the bottom of the cone. The interval between the cone and the periphery is equally spaced. The slot, the seeds into each slot mouth is the same amount, the seeds through the lower end of the slot connected to the input tube into the inoculation cup or Sheng kind of paper bag.
In order to reduce the sampling error, the following measures have been adopted in the structure design: The tenth guarantees that the concentricity of the cone and bottom of the funnel is high, and o the leveling device for leveling (fullness level) is set. » The seeds of the splitter's cone-bottom diagonal and equilateral triangle notches are pooled into six and four parts for the seed-collecting tubes, and small-sized seeds (such as millet and grass) are filled with small funnels to reduce the size of the small funnels. Small funnel diameter, improve the accuracy of sampling. Due to the above measures, the sampling error is about 1%.
The number of seeds of the sampler for the sampler is used by the agricultural research department, and the seeds are very good. In addition to seed equivalent sampling, equal quantification fertilizer samples, soil and other materials, it can also be used as a sample for food sampling and soil fertilizer testing. The identification has been put into small batch production.
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