三年片在线观看免费动漫,解开人妻的裙子猛烈进入,倒插莲花男女之间的寓意
-
地點: 呼和浩特市
開展時間: 2025-03-26
舉辦單位: 內蒙古農牧業(yè)機械行業(yè)協(xié)會、內蒙古自治區(qū)經濟發(fā)展與研究促進會
-
地點: 合肥市
開展時間: 2025-03-27
舉辦單位: 上海市貿促會、安徽省貿促會
-
地點: 無錫市
開展時間: 2025-03-29
舉辦單位: 中國機電產品流通協(xié)會、無錫市機床工具行業(yè)協(xié)會、無錫市工業(yè)和信息化局
農民的智慧 從原始農業(yè)時期就已開始
2017-08-04
11:25:33
來源:中國農機網 閱讀量:50551
評論
【中國農機網 本站原創(chuàng)】 農業(yè)生產離不開農業(yè)機械,隨著社會的發(fā)展和科技的進步,現(xiàn)代農業(yè)機械越來越先進,同時也越來越智能,農民甚至足不出戶就可以把地種了。其實,在農耕時期,我國勞動人民就憑借自身的智慧創(chuàng)造出了形形色色的農具,以便更輕松的耕種土地。
追溯到原始農業(yè)時期,農業(yè)生產方式簡單粗放,農民以石、骨、蚌、木為主要的材料來制作農具,農具的種類主要有三種:農耕用、收割用和加工用。農耕類的農具包括鏟、耒、鋤這些,收割類的就是刀和鐮,而加工類的常見的就是石磨盤和石磨棒。
在原始社會時期,人們能利用的資源很有限,開始產生的農具便是以木頭為材料制成的耒耜,是一種翻土的農具,形如木叉,上有曲柄,下面是犁頭,可看作犁的前身,其發(fā)明開創(chuàng)了中國的農耕文化,后來發(fā)展成為先秦時期主要的農耕工具。
至夏、商、西周時期,雖然農具材料仍然以木、石、骨為主,但是當時已有青銅產生,在西周末年,青銅便應用于一些中耕農具和收割農具。在灌溉器具方面,有商代的桔槔,西周的戽桶和吊桶,這一時期的農機具種類甚少,但是卻為后面鐵制農具的發(fā)展奠定了基礎。
春秋戰(zhàn)國時期,冶鐵業(yè)興起,它的出現(xiàn)使中國農具*迎來一次大變革:鐵質農具產生,開始替代過去的以木、石為材料的農具,在木器上添加一個鐵質的刃片,有效地提高了生產效率。從考古出土的實物看,當時使用一種呈V字型的鐵犁頭,可以減少耕地時的阻力。
秦朝統(tǒng)一中國之后,尤其是兩漢以來,由于冶鐵業(yè)得到快速發(fā)展,鐵制農具發(fā)展迅速,成為“民之大用”。為了適應農業(yè)生產發(fā)展的需要,這一時期農具的種類開始增多,質量上也大有提高,西漢中期以后,木心鐵刃的農具全部被鐵制農具代替,隨著牛耕的逐漸普及,耕犁也有所革新,創(chuàng)造了犁壁,對于深耕和碎土更為有利。唐代《耒耜經》中記載的曲轅犁,相比之前的耕犁,構造更加完善,由11個部件組成,能根據(jù)需要進行深耕和淺耕,以及調節(jié)耕地的寬窄,操作方便。至魏晉南北朝時期,出現(xiàn)了用于碎土保墑、平整土地的耙和耖。這一時期播種耬車的出現(xiàn)讓農業(yè)生產實現(xiàn)了大躍進,播種耬車下端有三個耬角,即開溝器,中間裝有盛貯種子的漏斗,播種時用牛拉車,一邊開溝,一邊播種,可以極大地提高耕作效率。此外,古代農民已有
農產品加工意識,舂米工具由杵臼到腳踏碓再到水力碓,技術上有了很大的進步。
時間來到宋、元時期,這一時期的農具發(fā)展在很大程度上都超過了前代。北魏《齊民要術》里記載了30多種農具,元代的《王禎農書》則記載了105種之多。犁具也在前代的基礎上有了更新,出現(xiàn)了犁床或犁壁上附有改進犁,便于墾耕。這一時期不得不提的一種農具就是播種和施肥相結合的下糞耬種,類似于現(xiàn)在的施肥
播種機,可實現(xiàn)一機多用,是古代智慧的結晶。
農具發(fā)展到離現(xiàn)代較近的明清時期,速度開始放緩,只是在農具的基礎上進行改進,其間出現(xiàn)了露鋤和以鹿角制成的農具,反映了農業(yè)開始向精耕細作的方向發(fā)展,值得一提的是,鋼鐵冶鑄技術對農具部件的改造有很大幫助。
細數(shù)我國古代農民發(fā)明創(chuàng)造的這些農具,其中閃耀著古代農民智慧的結晶,時代發(fā)展至今,技術每天都在進步,傳統(tǒng)農業(yè)的生產方式也會逐漸被淘汰掉,但人們的智慧源泉是不會枯竭的,每一個傳統(tǒng)的農具都是一個農耕時期的代表,反映了我國古代農業(yè)文明的發(fā)展歷程。
版權與免責聲明: 凡本網注明"來源:農機網”的所有作品,均為浙江興旺寶明通網絡有限公司-農機網合法擁有版權或有權使用的作品,未經本網授權不得轉載、摘編或利用其它方式使用上述作品。已經本網授權使用作品的,應在授權范圍內使用,并注明“來源:農機網www.goodqmj.com" 。違反上述聲明者,本網將追究其相關法律責任。
本網轉載并注明自其它來源(非農機網www.goodqmj.com)的作品,目的在于傳遞更多信息,并不代表本網贊同其觀點或和對其真實性負責,不承擔此類作品侵權行為的直接責任及連帶責任。其他媒體、網站或個人從本網轉載時,必須保留本網注明的作品第一來源,負版權等法律責任。
主站蜘蛛池模板:
若尔盖县|
秦安县|
苍溪县|
阜康市|
永川市|
隆回县|
突泉县|
于都县|
汪清县|
平武县|
屯留县|
筠连县|
天津市|
嘉定区|
益阳市|
勐海县|
都兰县|
拜城县|
墨脱县|
独山县|
竹山县|
宣城市|
永寿县|
赤峰市|
平罗县|
牡丹江市|
高安市|
洛浦县|
宁陵县|
同心县|
高邑县|
保靖县|
金川县|
满城县|
平陆县|
西安市|
遂川县|
肃北|
泰宁县|
阿鲁科尔沁旗|
瑞丽市|
[{"ID":"3045723","Picture":"00450ea57bc9bc7da63c84b46467ef9d0087083032408b838f840433102e529101f2d6f43c1c1bed.png","PictureDomain":"img80","Name":"進口高速相機","Type":"","Descrip":"EoSens 3CL相機為非獨立式高速相機,該系列相機具有高分辨率,高幀速特點,成像質量好,使用穩(wěn)定。在4百萬像素下可以使采集幀頻到達500fps,并且支持ROI功能,可以進一步的提高幀頻,非常適用于工業(yè)及科研應用。","CompanyName":"上海五鈴光電科技有限公司","CompanyID":"129664","MarketPrice":"0","PsOrder":"0","PgID":"110","MaxOrder":"0","CityID":"3","City":"上海市","Address":"上海市","PropertysValue":"","HitNumber":"167","FrontShow":"0","IsCharges":"1","Year":"1","StarNum":"1","UpdateAndClientSort":"51693975","StandUrl":"/st129664","UpdateTime":"2025/3/26 19:35:13","TodayIsUpdate":"1","AttType":"0","AttState":"3","AttAddType":"3","IsSeoCreate":"0","IsOnlinePay":"0","MinPrice":"0.00","MaxPrice":"0.00","ClassID":"21002","productonlinetime":"1900/1/1 0:00:00","OnLineDate":"1900/1/1 0:00:00","DownLineDate":"1900/1/1 0:00:00","BrandPicDomin":"","BrandPicName":"","BrandProperty":"","PBrandID":"0","IsHadVideo":"0","VideoTime":"0","ShowPrice":"0.00","IndustrySort":"1020000","HasPicSort":"103045723","UserID":"142653","PriceType":"0","PictureID":"1709746","CompanyTypeID":"5","Tag":"","LinkMan":"袁冬梅","TelPhone":"86-021-56079729","ClassName":"其它","ComProduct":"機載高光譜、在線高光譜、實時高光譜、顯微高光譜、太赫茲光譜探測系統(tǒng)、紅外相機、高速相機、3D相機","BrandNameCH":"","IsShow":"1","MarketPrice2":"0","RetailPrice":"0","ComHitnumber":"29172","MarketUpdateTime":"","CreateTime":"2024/5/25 2:08:36","Flag":"1","PackageName":"營銷寶會員","ClientSort":"0","CsName":"","Reprint":"2","FeedBackMsg":"","EnUrl":"","MobilePhone":"13482574326"},{"ID":"3026369","Picture":"00450ea57bc9bc7dca14a12b2faba4262777492a10b0747973cca75ff36847134f894358d6d04b33.jpg","PictureDomain":"img73","Name":"供應熱式氣體流量計公司","Type":"MFM-50","Descrip":"氣體流量計選型專門用于氣體流量的高精度測量。該系列流量計采用業(yè)內優(yōu)良的流量傳感芯片,結合航空鋁材拋光氣體流道設計以及公司核心的標定和補償算法","CompanyName":"青島芯笙微納電子科技有限公司","CompanyID":"129194","MarketPrice":"0","PsOrder":"0","PgID":"110","MaxOrder":"0","CityID":"148","City":"青島市","Address":"青島市","PropertysValue":"","HitNumber":"77","FrontShow":"0","IsCharges":"1","Year":"1","StarNum":"1","UpdateAndClientSort":"51693975","StandUrl":"/st129194","UpdateTime":"2025/3/26 19:35:02","TodayIsUpdate":"1","AttType":"0","AttState":"3","AttAddType":"3","IsSeoCreate":"0","IsOnlinePay":"0","MinPrice":"0.00","MaxPrice":"0.00","ClassID":"21002","productonlinetime":"1900/1/1 0:00:00","OnLineDate":"1900/1/1 0:00:00","DownLineDate":"1900/1/1 0:00:00","BrandPicDomin":"","BrandPicName":"","BrandProperty":"","PBrandID":"0","IsHadVideo":"0","VideoTime":"0","ShowPrice":"0.00","IndustrySort":"1020000","HasPicSort":"103026369","UserID":"142183","PriceType":"0","PictureID":"1678423","CompanyTypeID":"5","Tag":"","LinkMan":"芯笙微納","TelPhone":"","ClassName":"其它","ComProduct":"質量流量控制器,質量流量計","BrandNameCH":"","IsShow":"1","MarketPrice2":"0","RetailPrice":"0","ComHitnumber":"32748","MarketUpdateTime":"","CreateTime":"2024/5/16 16:05:13","Flag":"1","PackageName":"營銷寶會員","ClientSort":"0","CsName":"","Reprint":"2","FeedBackMsg":"","EnUrl":"","MobilePhone":"4000066550"},{"ID":"2948579","Picture":"mt0024/5/20221223/638073794532774834653.gif","PictureDomain":"img66","Name":"供應氨氮試紙多少錢","Type":"","Descrip":"德國MERCK(默克)氨氮測試紙1.10024.0001測量范圍:10-400mg/L,測試次數(shù):100次/盒","CompanyName":"北京豐美天合科技有限公司","CompanyID":"128779","MarketPrice":"0","PsOrder":"0","PgID":"110","MaxOrder":"0","CityID":"1","City":"北京市","Address":"北京市","PropertysValue":"","HitNumber":"83","FrontShow":"0","IsCharges":"1","Year":"1","StarNum":"1","UpdateAndClientSort":"51693975","StandUrl":"/st128779","UpdateTime":"2025/3/26 19:35:19","TodayIsUpdate":"1","AttType":"0","AttState":"3","AttAddType":"0","IsSeoCreate":"0","IsOnlinePay":"0","MinPrice":"0.00","MaxPrice":"0.00","ClassID":"21002","productonlinetime":"1900/1/1 0:00:00","OnLineDate":"1900/1/1 0:00:00","DownLineDate":"1900/1/1 0:00:00","BrandPicDomin":"","BrandPicName":"","BrandProperty":"","PBrandID":"0","IsHadVideo":"0","VideoTime":"0","ShowPrice":"0.00","IndustrySort":"1020000","HasPicSort":"102948579","UserID":"141768","PriceType":"0","PictureID":"1677567","CompanyTypeID":"5","Tag":"","LinkMan":"銷售部","TelPhone":"86-10-59792357","ClassName":"其它","ComProduct":"進口實驗室超純水機,進口水質分析儀,進口玻璃反應釜,旋轉蒸發(fā)儀,真空泵,制冷循環(huán)器,攪拌器,實驗室玻璃器皿,實驗耗材","BrandNameCH":"","IsShow":"1","MarketPrice2":"0","RetailPrice":"0","ComHitnumber":"38161","MarketUpdateTime":"","CreateTime":"2024/3/25 3:07:49","Flag":"1","PackageName":"營銷寶會員","ClientSort":"0","CsName":"","Reprint":"2","FeedBackMsg":"","EnUrl":"","MobilePhone":""},{"ID":"3311605","Picture":"mt0001/524a3bd3880c11bcb6337349bcf00a788e42436c2cf0f1e7b87b0f61b320e0a869b9871e683ce80c.jpg","PictureDomain":"img68","Name":"大流量粉塵采樣器多少錢","Type":"CCZ30","Descrip":"大流量粉塵采樣器氣體檢測, 該粉塵采樣器由高性能吸氣泵、自動時間控制電路、流量調節(jié)電路、自動反饋恒流電路、欠壓保護報警電路、安全電源等組成,配有多種粉塵預捕集器。","CompanyName":"北京和潤愷安科技發(fā)展股份有限公司","CompanyID":"142464","MarketPrice":"0","PsOrder":"0","PgID":"110","MaxOrder":"0","CityID":"1","City":"北京市","Address":"北京市","PropertysValue":"","HitNumber":"2","FrontShow":"0","IsCharges":"1","Year":"1","StarNum":"1","UpdateAndClientSort":"51693973","StandUrl":"/st142464","UpdateTime":"2025/3/26 19:33:17","TodayIsUpdate":"1","AttType":"0","AttState":"3","AttAddType":"3","IsSeoCreate":"0","IsOnlinePay":"0","MinPrice":"0.00","MaxPrice":"0.00","ClassID":"21002","productonlinetime":"1900/1/1 0:00:00","OnLineDate":"1900/1/1 0:00:00","DownLineDate":"1900/1/1 0:00:00","BrandPicDomin":"","BrandPicName":"","BrandProperty":"","PBrandID":"0","IsHadVideo":"0","VideoTime":"0","ShowPrice":"0.00","IndustrySort":"1020000","HasPicSort":"103311605","UserID":"155465","PriceType":"0","PictureID":"2088612","CompanyTypeID":"5","Tag":"","LinkMan":"趙先生","TelPhone":"86-010-84871533","ClassName":"其它","ComProduct":"C1500空氣采樣器,CCZ5個體粉塵采樣器,CCZ30粉塵采樣器,核酸采樣亭","BrandNameCH":"","IsShow":"1","MarketPrice2":"0","RetailPrice":"0","ComHitnumber":"106","MarketUpdateTime":"","CreateTime":"2025/3/26 19:33:17","Flag":"1","PackageName":"營銷寶會員","ClientSort":"0","CsName":"","Reprint":"2","FeedBackMsg":"","EnUrl":"","MobilePhone":"18611275507"},{"ID":"3216205","Picture":"mt0001/dc0620ef491df177b43e9c9c05ec6ced22dadc65ec88f62b25012579bafa3a6c9eb2a3e2b4269e9c.jpg","PictureDomain":"img66","Name":"GUY5油位液位變送器傳感器","Type":"GUY5","Descrip":"GUY5礦用本安型液位傳感器主要是用于煤礦行業(yè)中的液位監(jiān)測,具有國家安標中心下發(fā)的MA證書和防爆證書,產品防滲漏,性能穩(wěn)定,標配具有MA標志的礦用安全線纜。","CompanyName":"湖南巍美電氣技術有限公司","CompanyID":"141613","MarketPrice":"0","PsOrder":"0","PgID":"110","MaxOrder":"0","CityID":"199","City":"長沙市","Address":"長沙市","PropertysValue":"","HitNumber":"155","FrontShow":"0","IsCharges":"1","Year":"1","StarNum":"1","UpdateAndClientSort":"51693973","StandUrl":"/st141613","UpdateTime":"2025/3/26 19:33:29","TodayIsUpdate":"1","AttType":"0","AttState":"3","AttAddType":"3","IsSeoCreate":"0","IsOnlinePay":"0","MinPrice":"0.00","MaxPrice":"0.00","ClassID":"21002","productonlinetime":"1900/1/1 0:00:00","OnLineDate":"1900/1/1 0:00:00","DownLineDate":"1900/1/1 0:00:00","BrandPicDomin":"","BrandPicName":"","BrandProperty":"","PBrandID":"0","IsHadVideo":"0","VideoTime":"0","ShowPrice":"0.00","IndustrySort":"1020000","HasPicSort":"103216205","UserID":"154614","PriceType":"0","PictureID":"1988727","CompanyTypeID":"5","Tag":"","LinkMan":"李生","TelPhone":"86-0731-85862887","ClassName":"其它","ComProduct":"礦用壓力傳感器,煤安溫度傳感器,本安型液位傳感器,濃度傳感器,沉降監(jiān)測傳感器,隔膜壓力表,流量測量,扭矩傳感器","BrandNameCH":"","IsShow":"1","MarketPrice2":"0","RetailPrice":"0","ComHitnumber":"5192","MarketUpdateTime":"","CreateTime":"2024/12/17 12:40:02","Flag":"1","PackageName":"營銷寶會員","ClientSort":"0","CsName":"","Reprint":"2","FeedBackMsg":"","EnUrl":"","MobilePhone":"15111274459"},{"ID":"2755876","Picture":"dabac5fac07fb39a4aa050a749f37eba27f92716e1fa5bf46b015459b34fb8174718873a5703154c.jpg","PictureDomain":"img70","Name":"江蘇CE認證電纜","Type":"歐標電纜","Descrip":"N2XCH歐標CE認證電力電纜用于工業(yè)、配電柜、電廠、廠內連接盒及街道照明,還可作為控制電纜用于控制傳輸脈沖及測試數(shù)據(jù)。要求使用時全面增加電及機械保護。這種電纜可敷設在室外、地下、水中、室內、電纜管道中。","CompanyName":"常州安耐特電纜有限公司","CompanyID":"129640","MarketPrice":"0","PsOrder":"0","PgID":"110","MaxOrder":"0","CityID":"89","City":"常州市","Address":"常州市","PropertysValue":"","HitNumber":"84","FrontShow":"0","IsCharges":"1","Year":"1","StarNum":"1","UpdateAndClientSort":"51693973","StandUrl":"/st129640","UpdateTime":"2025/3/26 19:33:03","TodayIsUpdate":"1","AttType":"0","AttState":"3","AttAddType":"3","IsSeoCreate":"0","IsOnlinePay":"0","MinPrice":"0.00","MaxPrice":"0.00","ClassID":"21002","productonlinetime":"1900/1/1 0:00:00","OnLineDate":"1900/1/1 0:00:00","DownLineDate":"1900/1/1 0:00:00","BrandPicDomin":"","BrandPicName":"","BrandProperty":"","PBrandID":"0","IsHadVideo":"0","VideoTime":"0","ShowPrice":"0.00","IndustrySort":"1020000","HasPicSort":"102755876","UserID":"142629","PriceType":"0","PictureID":"1708796","CompanyTypeID":"5","Tag":"","LinkMan":"張","TelPhone":"86-0519-81099181","ClassName":"其它","ComProduct":"電線電纜","BrandNameCH":"","IsShow":"1","MarketPrice2":"0","RetailPrice":"0","ComHitnumber":"11731","MarketUpdateTime":"","CreateTime":"2023/6/2 20:18:04","Flag":"1","PackageName":"營銷寶會員","ClientSort":"0","CsName":"","Reprint":"2","FeedBackMsg":"","EnUrl":"","MobilePhone":"15961427590"}]
所有評論僅代表網友意見,與本站立場無關。