今日要聞

夏至：白晝漸長(zhǎng)， 農(nóng)事繁忙

2018-06-21 17:42:53 來(lái)源：中國(guó)農(nóng)機(jī)網(wǎng)整理發(fā)布 閱讀量：27811 評(píng)論

導(dǎo)讀：作為二十四節(jié)氣中個(gè)被確認(rèn)的一個(gè)節(jié)氣，開(kāi)始先人是用先人的采用土圭測(cè)日影確定的。

　　【中國(guó)農(nóng)機(jī)網(wǎng) 市場(chǎng)行情】“夏至，日北至，日長(zhǎng)之至，日影短至，故曰夏至。至者，極也。”
 
　　——《恪遵憲度抄本》
 
　　作為二十四節(jié)氣中個(gè)被確認(rèn)的一個(gè)節(jié)氣，開(kāi)始先人是用先人的采用土圭測(cè)日影確定的。
 
　　這一天開(kāi)始，太陽(yáng)幾乎直射北回歸線，到達(dá)一年的北端，北半球各地迎來(lái)一年中白晝長(zhǎng)的一天。都說(shuō)“不過(guò)夏至不熱”，夏至后的氣溫會(huì)繼續(xù)升高，再過(guò)二三十天，就會(huì)進(jìn)入一年當(dāng)中熱的時(shí)候。同時(shí)，由于這個(gè)時(shí)間段的地面受熱強(qiáng)烈，空氣對(duì)流旺盛，午后到傍晚時(shí)候經(jīng)常會(huì)出現(xiàn)雷陣雨天氣。這種熱雷雨往往來(lái)的突然，并且時(shí)間短降雨范圍小，人們稱“夏雨隔田坎”。
 
　　夏至后進(jìn)入三伏天，氣溫持續(xù)升高的同時(shí)光照足，雨水增多，良好的天氣條件使得農(nóng)作物生長(zhǎng)旺盛。當(dāng)然，與此同時(shí)，伴隨而來(lái)的就是害蟲(chóng)、雜草的迅速滋長(zhǎng)蔓延，它們不僅與作物爭(zhēng)水爭(zhēng)肥爭(zhēng)陽(yáng)光，而且是多種病菌和害蟲(chóng)的寄主，老話常說(shuō)：“夏至不鋤根邊草，如同養(yǎng)下毒蛇咬。”因此，務(wù)必要加強(qiáng)田間管理工作。高原牧區(qū)也將迎來(lái)草肥畜旺的黃金季節(jié)。
 
　　夏至節(jié)氣是華南東部全年雨量多的節(jié)氣，往后常受副熱帶高壓控制，出現(xiàn)伏旱。為了增強(qiáng)抗旱能力，奪取農(nóng)業(yè)豐收，在這些地區(qū)，搶蓄伏前雨水是一項(xiàng)重要措施。
 
　　另外，夏至?xí)r節(jié)正是江淮一帶的“梅雨”季節(jié)，這時(shí)正是江南梅子黃熟期，空氣非常潮濕，冷、暖空氣團(tuán)在這里交匯，并形成一道低壓槽，導(dǎo)致陰雨連綿的天氣。一方面，對(duì)于夏旱地區(qū)來(lái)說(shuō)自然是喜大普奔，并且在淮河以南地區(qū)，早稻抽穗揚(yáng)花，田間水分管理上要求足水抽穗，濕潤(rùn)灌漿，干干濕濕，這樣才能既滿足水稻結(jié)實(shí)對(duì)水分的需要，又能透氣養(yǎng)根，保證活熟到老，提高籽粒重；但另一方面而言，頻繁發(fā)生的暴雨天氣容易造成洪澇災(zāi)害，對(duì)于農(nóng)作物尤其是旱作物來(lái)說(shuō)也是不利于生長(zhǎng)的。因此，要特別注意作好防洪準(zhǔn)備，雨季到來(lái)之前將田間排水溝挖好，有堵塞的及早疏通，確保降雨后田間不積水、不澇地；對(duì)溫室墻體、屋頂?shù)嚷┯瓴课贿M(jìn)行檢查和修繕，防止雨季坍塌；對(duì)草苫、保溫被等存放情況進(jìn)行檢查，確保不因漏雨而造成損失。
 
　　對(duì)于瓜果蔬菜，要及時(shí)采摘，科學(xué)合理澆水施肥，做好病蟲(chóng)害的防治工作。而針對(duì)大棚作物，也要注意在降雨時(shí)不要掀開(kāi)溫室棚膜，盡量避免雨淋到作物，避免雨水帶來(lái)細(xì)菌，導(dǎo)致蔬菜染病。
 
　　在水產(chǎn)養(yǎng)殖方面，隨著氣溫的升高，池塘水溫也達(dá)到了二十七度左右，這個(gè)溫度是魚(yú)蝦適宜生長(zhǎng)的溫度，它們的攝食強(qiáng)度會(huì)加大，餌料利用率提高，進(jìn)入生長(zhǎng)旺期。這時(shí)候，養(yǎng)殖戶可以適當(dāng)增加餌料投喂了量，并注意預(yù)防病害的發(fā)生。定期使用一些消毒藥物，殺滅水體中的病原菌、病原體，適當(dāng)用一些微生態(tài)制劑，包括光合細(xì)菌、芽孢桿菌等這些，通過(guò)生物的辦法，抑制病原微生物的大量滋生。
 
　　此文由本網(wǎng)整理發(fā)布，如有侵權(quán)或異議請(qǐng)聯(lián)系我們。

上一篇： 再談秸稈綜合化利用

下一篇：2018大蒜豐收年：博弈大戰(zhàn)序幕已拉開(kāi)

我要評(píng)論
文明上網(wǎng)，理性發(fā)言。（您還可以輸入200個(gè)字符)

所有評(píng)論僅代表網(wǎng)友意見(jiàn)，與本站立場(chǎng)無(wú)關(guān)。

產(chǎn)品推薦 更多

[{"ID":"3084982","Picture":"mt0001/5f8c4cffcfd3c26ab72c5350621977d90db7b264f5274861fdf9abc9b1b6050f35b4ab243d840d5a.jpg","PictureDomain":"img71","Name":"銷(xiāo)售雙支鉑銠熱電偶公司","Type":"","Descrip":"WRR-430雙支鉑銠熱電偶它作為溫度測(cè)量傳感器,通常與溫度變送器、調(diào)節(jié)器及顯示儀表等配套使用,組成過(guò)程控制系統(tǒng)，用以直接測(cè)量或控制各種生產(chǎn)過(guò)程中0-1800℃范圍內(nèi)的流體、蒸汽和氣體介質(zhì)以及固體表面等溫度。","CompanyName":"上海自動(dòng)化儀表有限公司","CompanyID":"139386","MarketPrice":"0","PsOrder":"0","PgID":"110","MaxOrder":"0","CityID":"394","City":"上海","Address":"上海","PropertysValue":"","HitNumber":"47","FrontShow":"0","IsCharges":"1","Year":"1","StarNum":"1","UpdateAndClientSort":"51558269","StandUrl":"/st139386","UpdateTime":"2024/12/22 13:49:01","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":"103084982","UserID":"152376","PriceType":"0","PictureID":"1905593","CompanyTypeID":"5","Tag":"","LinkMan":"銷(xiāo)售部","TelPhone":"021-56699281","ClassName":"其它","ComProduct":"熱電偶，熱電阻，雙金素溫度計(jì)，壓力表，壓力變送器，溫度變送器，磁翻板液位計(jì)，電磁流量計(jì)，等等.","BrandNameCH":"","IsShow":"1","MarketPrice2":"0","RetailPrice":"0","ComHitnumber":"8925","MarketUpdateTime":"","CreateTime":"2024/7/14 1:21:54","Flag":"1","PackageName":"營(yíng)銷(xiāo)寶會(huì)員","ClientSort":"0","CsName":"","Reprint":"2","FeedBackMsg":"","EnUrl":"","MobilePhone":"13917478996"},{"ID":"2954514","Picture":"mt0001/0c2d0c0cd7955a495b63533c5bf176f4cc39ae85de0861951bb2a982e40b622f21bcb96afb559f78.jpg","PictureDomain":"img70","Name":"銷(xiāo)售WTW臺(tái)式濁度計(jì)價(jià)格","Type":"Turb750","Descrip":"WTW Turb 750 系列的wtw新型濁度儀。它們滿足了許多實(shí)驗(yàn)室和工業(yè)用戶對(duì) AQA 支持的濁度測(cè)量（高達(dá) 1100 FNU/NTU）的愿望","CompanyName":"上海牧晨電子技術(shù)有限公司","CompanyID":"135749","MarketPrice":"0","PsOrder":"0","PgID":"110","MaxOrder":"0","CityID":"3","City":"上海市","Address":"上海市","PropertysValue":"","HitNumber":"136","FrontShow":"0","IsCharges":"1","Year":"1","StarNum":"1","UpdateAndClientSort":"51558269","StandUrl":"/st135749","UpdateTime":"2024/12/22 13:49:20","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":"102954514","UserID":"148739","PriceType":"0","PictureID":"1842267","CompanyTypeID":"5","Tag":"","LinkMan":"劉小姐","TelPhone":"021-64358726","ClassName":"其它","ComProduct":"賽萊默德國(guó)WTW多參數(shù)水質(zhì)檢測(cè)儀Multi3630/3620/3510，BOD測(cè)量?jī)xOxiTop-i IS 12/6/7310，便攜式光度計(jì)pHotoFlex STD，紫外分光光度計(jì)photoLab 7600/7100，英國(guó)科賽樂(lè)CASELLA個(gè)體聲暴露計(jì)dBadge2，采樣泵APEX2，粉塵儀CEL-712，英國(guó)B+S折光儀RFM340，激光顆粒計(jì)數(shù)器PC2200/2300，酒精測(cè)試儀CA2000/20F","BrandNameCH":"","IsShow":"2","MarketPrice2":"0","RetailPrice":"0","ComHitnumber":"11174","MarketUpdateTime":"","CreateTime":"2024/3/26 14:27:12","Flag":"1","PackageName":"營(yíng)銷(xiāo)寶會(huì)員","ClientSort":"0","CsName":"","Reprint":"2","FeedBackMsg":"","EnUrl":"","MobilePhone":"18916268489,18939747969"},{"ID":"2844087","Picture":"74a34d6b99a3c732b2d227d9fcf5173b6e0941b8835754550182f7e330ec433826ab44adaeb8a009.jpg","PictureDomain":"img47","Name":"氣體玻璃轉(zhuǎn)子流量計(jì)價(jià)格","Type":"","Descrip":"玻璃轉(zhuǎn)子流量計(jì)產(chǎn)品體積小、結(jié)構(gòu)輕巧，外形美觀，維修方便、安全可靠，安裝簡(jiǎn)單。F10、20、30型法蘭可轉(zhuǎn)動(dòng)，與現(xiàn)場(chǎng)管道法蘭孔吻合。","CompanyName":"常州市良邦儀器儀表有限公司","CompanyID":"130974","MarketPrice":"0","PsOrder":"0","PgID":"110","MaxOrder":"0","CityID":"89","City":"常州市","Address":"常州市","PropertysValue":"","HitNumber":"68","FrontShow":"0","IsCharges":"1","Year":"1","StarNum":"1","UpdateAndClientSort":"51558269","StandUrl":"/st130974","UpdateTime":"2024/12/22 13:49:02","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":"102844087","UserID":"143963","PriceType":"0","PictureID":"1768013","CompanyTypeID":"5","Tag":"","LinkMan":"張辰","TelPhone":"0519-85508809","ClassName":"其它","ComProduct":"玻璃轉(zhuǎn)子流量計(jì),金屬管浮子流量計(jì),液體玻璃轉(zhuǎn)子流量計(jì),磁翻板液位計(jì),DK800玻璃轉(zhuǎn)子流量計(jì)","BrandNameCH":"","IsShow":"1","MarketPrice2":"0","RetailPrice":"0","ComHitnumber":"18325","MarketUpdateTime":"","CreateTime":"2023/11/2 19:17:52","Flag":"1","PackageName":"營(yíng)銷(xiāo)寶會(huì)員","ClientSort":"0","CsName":"","Reprint":"2","FeedBackMsg":"","EnUrl":"","MobilePhone":"13775206976"},{"ID":"2740594","Picture":"00450ea57bc9bc7d1b86278ddb1773875fcc3aec1f1a90fa6a000ef2719e636d6a8e7a8741a66bc0.png","PictureDomain":"img67","Name":"全自動(dòng)高精度標(biāo)定恒溫槽公司","Type":"YT-DW-4F系列","Descrip":"設(shè)備功能：高精度標(biāo)定恒溫槽, 采用風(fēng)冷式壓縮機(jī)制冷，全封閉進(jìn)口電機(jī)攪拌 ?內(nèi)膽為全不銹鋼，清潔衛(wèi)生，美觀耐腐蝕。制冷設(shè)備采用國(guó)外的自動(dòng)控制技術(shù)、和環(huán)保制冷劑、制冷快、 操作方便。數(shù)顯微機(jī)智能PID溫控儀,控溫準(zhǔn)確，在低溫 20℃和高溫 100℃、范圍內(nèi)可任意選擇. 恒溫準(zhǔn)確，一旦設(shè)定溫度，加熱制冷自動(dòng)進(jìn)行，快速接近理想溫度","CompanyName":"武漢伊特儀器有限公司","CompanyID":"129482","MarketPrice":"0","PsOrder":"0","PgID":"110","MaxOrder":"0","CityID":"182","City":"武漢市","Address":"武漢市","PropertysValue":"","HitNumber":"125","FrontShow":"0","IsCharges":"1","Year":"1","StarNum":"1","UpdateAndClientSort":"51558267","StandUrl":"/st129482","UpdateTime":"2024/12/22 13:47:04","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":"102740594","UserID":"142471","PriceType":"0","PictureID":"1700799","CompanyTypeID":"5","Tag":"","LinkMan":"張兵","TelPhone":"027-83491617","ClassName":"其它","ComProduct":"石油儀器;油品測(cè)定儀;油品化驗(yàn)分析儀;閃點(diǎn)測(cè)定儀;粘度測(cè)定儀;蒸餾測(cè)定儀;殘?zhí)繙y(cè)定儀;機(jī)械雜質(zhì)測(cè)定儀;抗乳化測(cè)定儀;泡沫特性測(cè)定儀;凝點(diǎn);濁點(diǎn);結(jié)晶點(diǎn);冷濾點(diǎn);冰點(diǎn);硫含量測(cè)定儀;實(shí)際膠質(zhì)測(cè)定儀;蒸發(fā)損失測(cè)定儀;蒸氣壓測(cè)定儀;氧化安定性測(cè)定儀;空氣釋放值測(cè)定儀;銅片;銀片腐蝕測(cè)定儀;石蠟熔點(diǎn)測(cè)定儀;石蠟含油量測(cè)定儀;原油蠟含量測(cè)定儀;瀝青蠟含量測(cè)定儀;液化石油氣殘留物測(cè)定儀;酸值測(cè)定儀;發(fā)動(dòng)機(jī)冷卻液腐蝕儀;電力測(cè)試儀;水浴槽;低溫冷卻液循環(huán)泵;低溫恒溫實(shí)驗(yàn)裝置;","BrandNameCH":"","IsShow":"1","MarketPrice2":"0","RetailPrice":"0","ComHitnumber":"26845","MarketUpdateTime":"","CreateTime":"2016/12/7 7:28:24","Flag":"1","PackageName":"營(yíng)銷(xiāo)寶會(huì)員","ClientSort":"0","CsName":"","Reprint":"2","FeedBackMsg":"","EnUrl":"","MobilePhone":"15972968818,18186454096"},{"ID":"3147209","Picture":"5eceadd4559dcfd2fd4ab81132f5ef04d330a561d79a20b82955ba444fb613870f45f7a3d12d003d.jpg","PictureDomain":"img63","Name":"人工氣候箱哪家好","Type":"","Descrip":"低溫人工氣候箱能直觀顯示箱內(nèi)溫濕度，室外溫度。人工氣候箱可設(shè)置內(nèi)膽保護(hù)溫度，高于內(nèi)膽保護(hù)溫度軟硬件自動(dòng)切斷電源，保護(hù)測(cè)試樣品，人工氣候箱具有超溫和傳感器異常保護(hù)功能，保證儀器和樣品安全；選配全光譜的植物生長(zhǎng)燈，有利于植物的生長(zhǎng)，提高抗病性。被廣泛應(yīng)用于生物遺傳工程、醫(yī)學(xué)、農(nóng)業(yè)、林業(yè)、環(huán)境科學(xué)、畜牧、水產(chǎn)等多個(gè)領(lǐng)域。","CompanyName":"菲斯福儀器（河北）有限公司","CompanyID":"128816","MarketPrice":"0","PsOrder":"0","PgID":"110","MaxOrder":"0","CityID":"13","City":"滄州市","Address":"滄州市","PropertysValue":"","HitNumber":"60","FrontShow":"0","IsCharges":"1","Year":"1","StarNum":"1","UpdateAndClientSort":"51558266","StandUrl":"/st128816","UpdateTime":"2024/12/22 13:46:01","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":"103147209","UserID":"141805","PriceType":"0","PictureID":"1667945","CompanyTypeID":"5","Tag":"","LinkMan":"王艷","TelPhone":"86-317-5337349","ClassName":"其它","ComProduct":"干燥箱，培養(yǎng)箱，恒溫恒濕箱，人工氣候箱，搖床，陶瓷纖維馬弗爐，凈化工作臺(tái)，攪拌器，加熱板，電熱套，水浴鍋","BrandNameCH":"","IsShow":"1","MarketPrice2":"0","RetailPrice":"0","ComHitnumber":"18213","MarketUpdateTime":"","CreateTime":"2024/9/24 9:52:28","Flag":"1","PackageName":"營(yíng)銷(xiāo)寶會(huì)員","ClientSort":"0","CsName":"","Reprint":"2","FeedBackMsg":"","EnUrl":"","MobilePhone":"19933786790"},{"ID":"3200395","Picture":"mt0001/418afcb93361055d29afa9a7a66201c99519a72ee5b3f66afa6f0fcdb1d68848a4ca95be067c42a2.jpg","PictureDomain":"img42","Name":"銷(xiāo)售VICI進(jìn)口氣體純化器","Type":"VICI","Descrip":"進(jìn)口Valco HP2氣體純化器：Valco HP2氦氣純化器和NP2氮?dú)饧兓魍ㄟ^(guò)吸氣合金材質(zhì)的純化襯底，有效去除活性氣體雜質(zhì)，確保氣體純度達(dá)到ppb級(jí)別。適用于高靈敏檢測(cè)器和雜質(zhì)檢測(cè)器，防止毛細(xì)柱損壞。設(shè)備具備自控裝置以維持適宜溫度，且安裝簡(jiǎn)便、安全可靠。氮?dú)夂秃饧兓鞣謩e針對(duì)氮?dú)夂投栊詺怏w進(jìn)行純化處理，滿足不同實(shí)驗(yàn)需求","CompanyName":"鄭州歐諾儀器有限公司","CompanyID":"141588","MarketPrice":"0","PsOrder":"0","PgID":"110","MaxOrder":"0","CityID":"164","City":"鄭州市","Address":"鄭州市","PropertysValue":"","HitNumber":"74","FrontShow":"0","IsCharges":"1","Year":"1","StarNum":"1","UpdateAndClientSort":"51558264","StandUrl":"/st141588","UpdateTime":"2024/12/22 13:44:01","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":"103200395","UserID":"154589","PriceType":"0","PictureID":"1987563","CompanyTypeID":"5","Tag":"","LinkMan":"王先生","TelPhone":"0371-68621130","ClassName":"其它","ComProduct":"溫濕度計(jì)、便攜式酒精檢測(cè)儀、混凝土測(cè)溫儀、氣體檢測(cè)儀，食品安全檢測(cè)儀、氣體發(fā)生器，風(fēng)速風(fēng)量風(fēng)壓儀，風(fēng)向袋，氣象儀器、食品溫度計(jì)、激光測(cè)距儀、測(cè)厚儀，噪聲計(jì)，環(huán)境檢測(cè)儀，儀器等","BrandNameCH":"","IsShow":"2","MarketPrice2":"0","RetailPrice":"0","ComHitnumber":"474","MarketUpdateTime":"","CreateTime":"2024/11/29 9:05:49","Flag":"1","PackageName":"營(yíng)銷(xiāo)寶會(huì)員","ClientSort":"0","CsName":"","Reprint":"2","FeedBackMsg":"","EnUrl":"","MobilePhone":"15516175235"}]