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Abstract In order to solve the problem of poor adaptability of existing peanut seed metering devices toseed size，an a internal filling metering device hole-wheel type peanut seed metering device was de-signed，in which the size of seed nest was controlled by regulator． The single seed rate，replaying rateand missing seeding rate of a single hole were used as test indexes，quadratic orthogonal rotary combina-tion experiment was carried out with the rotational speed of seed metering device，the length of seed nestand the size of seed as experimental factors． The Ｒresults showed that the order of their effectiveness toSeed-metering Performance was as follows: length of filling hole，seed size，speed of wheel． The parame-ter optimization of the model was that when the rotate speed of seed plate was 40 r/min，the length of fill-ing hole was 9 mm，seed size was 15. 6 mm，the Performance was the best，which leaded to the singleseed rate was 95. 3%，repeat rate was 2. 7% and omitting rate was 2. 2%． The seed meter was suitablefor seed size through adjusting the length of filling hole control the seeding capacity．
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Received: 18 September 2020
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2019, Vol. 32 
