Li, Zhonghua

Liu, Guilin

Wang, Decheng

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings XXI International Grassland Congress / VIII International Rangeland Congress Experimental Study on Sowing Seeds by Air‐Stream Metering Mechanism Zhonghua Li China Agricultural University, China Decheng Wang China Agricultural University, China Guilin Liu Chinese Academy of Agricultural Mechanization Sciences, China Follow this and additional works at: https://uknowledge.uky.edu/igc  Part of the Plant Sciences Commons, and the Soil Science Commons This document is available at https://uknowledge.uky.edu/igc/21/14-2/21 The XXI International Grassland Congress / VIII International Rangeland Congress took place in Hohhot, China from June 29 through July 5, 2008. Proceedings edited by Organizing Committee of 2008 IGC/IRC Conference Published by Guangdong People's Publishing House This Event is brought to you for free and open access by the Plant and Soil Sciences at UKnowledge. It has been accepted for inclusion in International Grassland Congress Proceedings by an authorized administrator of UKnowledge. For more information, please contact UKnowledge@lsv.uky.edu. 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅱ 　 瞯 ]619　 瞯Grasslands/Rangelands Production Systems——— Seed Science and TechnologyExperimental study on sowing seeds by air‐stream metering mechanismZhonghua L i1 ,Decheng W ang1 ,Guilin L iu2 .1 China A gricultural University , ＋ 0086 10 62737147 . E‐mail :j oy lz h＠ 126 .com . 2 H uhhot branch o f Chinese A cademy o fA gricultural Mechaniz ation Sciences .Key words :air‐stream , metering mechanism ,experimental , uniformity , seedsIntroduction In china , grassland has many serious problems , such as degeneration , desertification and salinization and so on . S .J . Miles et al (１９９９ ) have studied a lightweight dibber drill , which can be capable of precisely metering small doses of granularpesticide with each seed . Tai Shuyun et al (２００３ ) have designed an incline outer‐fluted feed with upper distribution which cansatisfy the planting demands of wheat precise seeding . At present , due to many merits , the outer groove‐wheel meteringmechanism are still inclined to sowing herbage and the crops in china . But , it had some disadvantages . This article proposed anew air‐steam metering mechanism .Materials and methods The air‐stream metering mechanism ( Figure １ ) consisted of the outer groove‐wheel metering frameworkand air‐stream distributor . The outer groove‐wheel metering framework was composed of two‐section metering wheel andagitator machine . It has two kinds of operating condition , namely , is small sheave and big sheaves sowing state . It can sowingbig granule seeds such as maize , as well as small granule seeds such as Medicago sativ a and Onobrychis v icii f olia Scop . Anair‐stream distributor was developed in such a way that the circular plate held perpendicular to the airflow direction , interceptedand divided it into sub‐streams . In order to prove the general versatility , the article chose seeds of Medicago sativ a , seeds ofElymus dahuricus and seeds of Zea mays to experiment .Table 1 Results o f the metering摧s per f ormance .Type ofseedflow rate( kg /hm２ )Stability of feedingrate in total Stability of feedingrate between rowsX ( g ) Δ′ ( ％ ) S ( g ) V ( ％ ) x ( g ) Δ ( ％ ) s ( g ) v ( ％ )Seeddamagerate( ％ )Produc‐tivity( hm２ / h)Medicago sativ a １２  .６０ ４９ ゥ.３８ ５ 眄.０８ １ K.０４ ２ *.１０ ２ .７４ １２ ~.７６ ０ 排.１１ ４ $.１５ ０ �.９２ ３ 煙.６０Elymus dahuricus ８  .００ ３２ ゥ.７３ ７ 眄.９１ １ K.０７ ３ *.２６ １ .８２ ２６ ~.２２ ０ 排.１５ ８ $.１３ １ �.６１ ３ 煙.６０Zea mays ９１  .００ ３８８ 技.３６ ８ 眄.３５ １３ b.２５ ３ *.４１ ２１ .５８ ２４ ~.１３ １ 排.５７ ７ $.２９ １ �.５６ ３ 煙.６０　 　 Figure 1 Structural diagram o fmetering mechanism1 . Distributor 2 . Seed deliverytube 3 . Di f f user tube 4 . Seedhop per 5 . Fan 6 . Mani f old 7 .Butter f ly valve 8 .Venturi cone 9 .Cell wheel 10 .A gitator sha f t .Results and discussion It recorded the weight of seeds collected at the outlet tubesand computed the indexes( Table １) , such as stability of feeding rate between rowsand stability of feeding rate in tall and so on . All the indexes achieved therequirements ( JB ５１５９‐９１ ) .Conclusions Show in the experiment , the air‐stream distributing feed mechanismcould sow the legumes forage seeds ( Medicago sativ a seeds) , the gramineous forageseeds ( Elymus dahuricus seeds ) and the crop seeds ( Zea mays seeds ) , and itsgeneral versatility was well . The indexes of the uniformity of distribution werebetter than the standard , and it could sow equally . But the experiment fixed someparameters , namely , the velocity of fan rotate , speed of land‐wheel and moisturerate of seeds were all changeless in the experiment . Hence , it should do some moreexperiments to research the influence of these parameters to the uniformity ofdistribution .ReferencesS . J . Miles ;J . N . Reed .Dibber Drill for Precise Placement of Seed and GranularPesticide [ J] .J . agricultural Engineering Research , １９９９ , ７４ :１２７‐１３３ .Tai Shuyun ,Fan Jie e` ,Liu Xiangzhong . Design of Incline Outer‐Fluted Feed withUpper Distribution .Chinese A gricultural Mechaniz ation , ２００３ , (４ ) :３４‐３５ .Zhang Bobing .Mechanical Engineering of Modern Planting [ M ] . Bei j ing : Chinamachine p ress , １９９７ :３２６‐３６６ .The National Standard on Mechanization of China . JB ５１５９‐９１ , Seed Drill o fForage‐Technical Term [ S] .

Experimental Study on Sowing Seeds by Air‐Stream Metering Mechanism

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Experimental Study on Sowing Seeds by Air‐Stream Metering Mechanism

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