无码AV大香线蕉伊人久久成人,日日噜噜夜夜狠狠视频免费
-
地點(diǎn):
開展時(shí)間: 2025-02-11
舉辦單位: 美國加州圖拉爾國際展覽中心
-
地點(diǎn): 巴彥淖爾市
開展時(shí)間: 2025-02-22
舉辦單位: 內(nèi)蒙古春季農(nóng)機(jī)展組委會(huì)
-
地點(diǎn): 廣州市
開展時(shí)間: 2025-02-25
舉辦單位: 廣州光亞法蘭克福展覽有限公司
媽媽喊你穿秋褲了嗎?寒露至,農(nóng)作物也怕霜凍
2018-10-08
10:51:40
來源:中國農(nóng)機(jī)網(wǎng)整理發(fā)布 閱讀量:32257
評(píng)論
導(dǎo)讀:《中國天文年歷》顯示,今天(10月8日)的16時(shí)15分,我們將迎來農(nóng)歷二十四節(jié)氣中個(gè)帶“寒”字的節(jié)氣——寒露。這個(gè)時(shí)期的氣溫比白露時(shí)更低,地面的露水快要凝結(jié)成霜,南嶺及以北的廣大地區(qū)均已進(jìn)入秋季,東北進(jìn)入深秋,西北地區(qū)已進(jìn)入或即將進(jìn)入冬季。
【中國農(nóng)機(jī)網(wǎng) 熱點(diǎn)關(guān)注】《中國天文年歷》顯示,今天(10月8日)的16時(shí)15分,我們將迎來農(nóng)歷二十四節(jié)氣中個(gè)帶“寒”字的節(jié)氣——寒露。這個(gè)時(shí)期的氣溫比白露時(shí)更低,地面的露水快要凝結(jié)成霜,南嶺及以北的廣大地區(qū)均已進(jìn)入秋季,東北進(jìn)入深秋,西北地區(qū)已進(jìn)入或即將進(jìn)入冬季。
隨著氣候的降低,又到了媽媽們催著穿秋褲的時(shí)候了,而事實(shí)上,農(nóng)作物也怕霜凍。北方產(chǎn)棉地區(qū)進(jìn)入后的棉花采摘時(shí)期,“寒露不摘棉,霜打莫怨天”,棉農(nóng)們要趕在霜前抓緊采摘棉花,以防棉花遭霜打質(zhì)量降低,棉花減產(chǎn)。有的人家“上午忙麥茬,下午摘棉花”,種麥、摘棉兩不耽誤。此外,紅薯對(duì)霜凍也十分敏感,易因受凍出現(xiàn)薯塊“硬心”現(xiàn)象,導(dǎo)致紅薯減產(chǎn),所以人們也多在寒露期間收獲完畢。
寒露時(shí)節(jié)正是秋收、秋種、秋管的重要時(shí)期,正所謂“人誤地一時(shí),地誤人一年”,寒露的到來意味著許多農(nóng)事需加緊進(jìn)行,否則甚至可能會(huì)影響到來年的豐收情況。
在北方,農(nóng)民們正忙于播種小麥、采摘棉花、刨紅薯等農(nóng)活的收尾工作。正所謂是“寒露種小麥,種一碗,收一斗”,“晚種一天,少收一石”,正需要抓緊時(shí)間種植冬小麥,這樣才能為小麥爭取足夠的生長期,保證來年有個(gè)好收成。
種上小麥后,還要加強(qiáng)小麥的田間管理。若寒露氣溫偏低,光照不足或地里營養(yǎng)欠缺影響小麥分蘗,需在小麥三葉期前適當(dāng)追肥澆水,促進(jìn)小麥分蘗,保證冬小麥有足夠的根系在冬日存活;若麥田濕度過大,需適當(dāng)松土以控制小麥生長,防止小麥因生長過快不能安然過冬,影響開春生長。同時(shí)人們也做好小麥播種的掃尾工作,如查苗補(bǔ)苗、消滅黃弱苗等。
此外,除麥地、棉花地外,其他農(nóng)田多閑置下來。此時(shí)溫度在零度以上,土地沒有凍結(jié),易于使犁翻地,利用冬閑養(yǎng)養(yǎng)地。同時(shí),翻地也可將埋于地下的越冬蟲及蟲卵晾到地表上,利用寒露以后溫度晝夜溫差大、夜間溫度低的特點(diǎn),將害蟲及其蟲卵凍死,減少來年莊稼的病蟲害,正所謂“寒露到立冬,翻地凍死蟲”。
而在南方地區(qū),進(jìn)入寒露才算進(jìn)入真正的秋季。此時(shí)適合種植油菜等耐寒作物;單季晚稻行將成熟,開始收割;雙季晚稻則正處于灌漿期,要繼續(xù)加強(qiáng)田間管理,做到淺水勤灌,干干濕濕,以濕為主,切忌后期斷水過早。
這一時(shí)期作物怕“寒露風(fēng)”的到來,江南一帶有“人怕老來窮,禾伯寒露風(fēng)”的說法。其實(shí)“寒露風(fēng)”是寒露節(jié)出現(xiàn)的一種低溫、干燥、風(fēng)勁較強(qiáng)的冷空氣,會(huì)使水稻灌漿受阻,空粒、黑粒增多,甚至出現(xiàn)“包頸穗”現(xiàn)象,降低結(jié)實(shí)率,或使稻株生長發(fā)育不良,導(dǎo)致水稻減產(chǎn)。
人們可于“寒露風(fēng)”來臨前,采用施農(nóng)家肥強(qiáng)壯株稈,加強(qiáng)田間灌溉,保持田間較高溫度等方法,使水稻免受“寒露風(fēng)”侵害。當(dāng)然,抗風(fēng)的灌水深度因時(shí)因地而異。若白天無陽光、風(fēng)大或夜晚,灌水深些;白天有陽光就淺些,或僅保持濕潤即可。風(fēng)過后,須立即排水,避免漚黑禾根、造成株稈變軟,降低抗風(fēng)能力。
寒露后天氣涼爽,有利于秋季蔬菜生長,是冬春棚菜地力培育和育苗有利時(shí)期,也有各種病蟲害發(fā)生與危害,應(yīng)安排好以下幾項(xiàng)蔬菜農(nóng)事:加強(qiáng)田間管理,灌水、防旱,追施肥料,促進(jìn)生長,噴施無公害農(nóng)藥防治病蟲害,及時(shí)采收,供應(yīng)市場;培育地力,利用晴好天氣,翻種棚菜田園,暴曬、風(fēng)化土壤,施用有機(jī)肥,噴施土壤消毒劑,殺菌滅蟲,提高肥力;新菜園區(qū),可增添鋼管大棚和竹棚,逐漸擴(kuò)大蔬菜保護(hù)地種植面積;做好病蟲害發(fā)生與防治工作。
寒露天氣由涼轉(zhuǎn)冷,畜禽容易發(fā)病,畜禽生產(chǎn)主要做好秋季防疫工作,及時(shí)做好豬、牛、羊、兔的疫病預(yù)防接種;養(yǎng)牛戶要及時(shí)做好配種工作,確保發(fā)情的母牛滿懷;此時(shí)正是是山羊放牧的好季節(jié),做到早放牧,遲歸欄,為越冬提供良好的膘情;飼養(yǎng)長毛兔農(nóng)戶要抓緊做好秋季配種工作,多配種、多繁育長毛兔,提高養(yǎng)兔效益;養(yǎng)牛、養(yǎng)羊、養(yǎng)兔專業(yè)戶要及時(shí)種好黑麥草,為牛、羊、兔越冬及明春有足夠青綠飼料;對(duì)于飼養(yǎng)蛋雞、蛋鴨專業(yè)戶要增加人工光照,可提高產(chǎn)蛋量。
本文由中國農(nóng)機(jī)網(wǎng)整理發(fā)布,如有侵權(quán)或異議請(qǐng)聯(lián)系我們。
版權(quán)與免責(zé)聲明: 凡本網(wǎng)注明"來源:農(nóng)機(jī)網(wǎng)”的所有作品,均為浙江興旺寶明通網(wǎng)絡(luò)有限公司-農(nóng)機(jī)網(wǎng)合法擁有版權(quán)或有權(quán)使用的作品,未經(jīng)本網(wǎng)授權(quán)不得轉(zhuǎn)載、摘編或利用其它方式使用上述作品。已經(jīng)本網(wǎng)授權(quán)使用作品的,應(yīng)在授權(quán)范圍內(nèi)使用,并注明“來源:農(nóng)機(jī)網(wǎng)balpclean.com" 。違反上述聲明者,本網(wǎng)將追究其相關(guān)法律責(zé)任。
本網(wǎng)轉(zhuǎn)載并注明自其它來源(非農(nóng)機(jī)網(wǎng)balpclean.com)的作品,目的在于傳遞更多信息,并不代表本網(wǎng)贊同其觀點(diǎn)或和對(duì)其真實(shí)性負(fù)責(zé),不承擔(dān)此類作品侵權(quán)行為的直接責(zé)任及連帶責(zé)任。其他媒體、網(wǎng)站或個(gè)人從本網(wǎng)轉(zhuǎn)載時(shí),必須保留本網(wǎng)注明的作品第一來源,負(fù)版權(quán)等法律責(zé)任。
[{"ID":"3052319","Picture":"mt0002/48081211c6b97a36dd0d7105ffac19d2f1ca4bc288b0138eb4e2848c7a98848704863e0976920d7f.jpg","PictureDomain":"img64","Name":"智能冷凍研磨儀哪家好","Type":"HMD-400","Descrip":"冷凍均質(zhì)研磨儀多功能研磨機(jī)是專門為處理實(shí)驗(yàn)室對(duì)硬性、中硬性和脆性樣品的細(xì)粉碎和精細(xì)研磨的設(shè)備。樣品范圍包含谷物、油料種子、土壤、煙草、木頭、動(dòng)物飼料、奶酪、水果、骨頭、頭發(fā)、植物及動(dòng)物組織、肥料、電子廢料、污泥、合金、煤炭、礦石、化學(xué)品、塑料、陶瓷、玻璃、DNA提取等樣品。","CompanyName":"上海滬析實(shí)業(yè)有限公司","CompanyID":"136897","MarketPrice":"0","PsOrder":"0","PgID":"110","MaxOrder":"0","CityID":"3","City":"上海市","Address":"上海市","PropertysValue":"","HitNumber":"79","FrontShow":"0","IsCharges":"1","Year":"1","StarNum":"1","UpdateAndClientSort":"51558919","StandUrl":"/st136897","UpdateTime":"2024/12/23 0:39:02","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":"103052319","UserID":"149887","PriceType":"0","PictureID":"1866438","CompanyTypeID":"5","Tag":"","LinkMan":"王","TelPhone":"400-808-1508","ClassName":"其它","ComProduct":"儀器儀表","BrandNameCH":"","IsShow":"1","MarketPrice2":"0","RetailPrice":"0","ComHitnumber":"10230","MarketUpdateTime":"","CreateTime":"2024/6/1 2:57:42","Flag":"1","PackageName":"營銷寶會(huì)員","ClientSort":"0","CsName":"","Reprint":"2","FeedBackMsg":"","EnUrl":"","MobilePhone":"13681642576"},{"ID":"2779925","Picture":"66dabcda8ca7909d6a83543ba0615190a0780340a1914ab68587bbd09333f3e928d731f2e69b10ee.jpg","PictureDomain":"img62","Name":"進(jìn)口微生物浮游菌采樣器哪家好","Type":"3080","Descrip":"浮游菌采樣器 加野Kanomax 3080應(yīng)用于制藥、醫(yī)院、食品和飲料、無塵室、生物全安柜、光電隔離器、室內(nèi)空氣品質(zhì)、博物館、圖書館、化妝品、紡織、農(nóng)業(yè)等領(lǐng)域的無菌環(huán)境監(jiān)測應(yīng)用。","CompanyName":"沈陽加野科學(xué)儀器有限公司","CompanyID":"130010","MarketPrice":"0","PsOrder":"0","PgID":"110","MaxOrder":"0","CityID":"50","City":"沈陽市","Address":"沈陽市","PropertysValue":"","HitNumber":"199","FrontShow":"0","IsCharges":"1","Year":"1","StarNum":"1","UpdateAndClientSort":"51558919","StandUrl":"/st130010","UpdateTime":"2024/12/23 0:39:03","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":"102779925","UserID":"142999","PriceType":"0","PictureID":"1723872","CompanyTypeID":"5","Tag":"","LinkMan":"沈陽加野","TelPhone":"86-024-23846440","ClassName":"其它","ComProduct":"熱線式風(fēng)速計(jì)、多點(diǎn)風(fēng)速計(jì)、風(fēng)量罩、風(fēng)速變送器、溫濕度計(jì)、粉塵計(jì)、噪聲計(jì)、塵埃粒子計(jì)數(shù)器","BrandNameCH":"","IsShow":"1","MarketPrice2":"0","RetailPrice":"0","ComHitnumber":"13611","MarketUpdateTime":"","CreateTime":"2023/7/16 21:03:15","Flag":"1","PackageName":"營銷寶會(huì)員","ClientSort":"0","CsName":"","Reprint":"2","FeedBackMsg":"","EnUrl":"","MobilePhone":"18840065038"},{"ID":"2948220","Picture":"mt0002/0c2d0c0cd7955a496e6a225da4b8896000eaccccc7fdf6cc7fea5002704b648dcf5d52bd2d5e623c.jpg","PictureDomain":"img63","Name":"全自動(dòng)防爆氣象站","Type":"JD-FBCQ","Descrip":"防爆氣象站Explosionsgeschützte Wetterstation每月制作石油化工行業(yè)旬報(bào),內(nèi)容包括企業(yè)所在地未來一旬的天氣現(xiàn)象、主要天氣過程、主導(dǎo)風(fēng)向、大風(fēng)速和高溫度及低溫度出現(xiàn)時(shí)的時(shí)間等信息,根據(jù)中期天氣預(yù)報(bào)中預(yù)測的天氣提出對(duì)企業(yè)和單位安全生產(chǎn)的不利影響和防范措施,使企業(yè)提前做好防范準(zhǔn)備。","CompanyName":"山東競道光電科技有限公司","CompanyID":"130882","MarketPrice":"0","PsOrder":"0","PgID":"110","MaxOrder":"0","CityID":"153","City":"濰坊市","Address":"濰坊市","PropertysValue":"","HitNumber":"65","FrontShow":"0","IsCharges":"1","Year":"1","StarNum":"1","UpdateAndClientSort":"51558918","StandUrl":"/st130882","UpdateTime":"2024/12/23 0:38:15","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":"102948220","UserID":"143871","PriceType":"0","PictureID":"1764661","CompanyTypeID":"5","Tag":"","LinkMan":"魏廣超","TelPhone":"","ClassName":"其它","ComProduct":"小型氣象站,氣象環(huán)境監(jiān)測站,氣象站設(shè)備,風(fēng)速風(fēng)向儀,非洲豬瘟檢測儀,超聲波氣象站,農(nóng)業(yè)氣象站,便攜式氣象站,防爆氣象站","BrandNameCH":"","IsShow":"1","MarketPrice2":"0","RetailPrice":"0","ComHitnumber":"19033","MarketUpdateTime":"","CreateTime":"2024/3/25 0:55:52","Flag":"1","PackageName":"營銷寶會(huì)員","ClientSort":"0","CsName":"","Reprint":"2","FeedBackMsg":"","EnUrl":"","MobilePhone":"15666889252"},{"ID":"2728728","Picture":"00450ea57bc9bc7dd36cf2cfd0fa192feb7a96306014dc4ef52cb2955261ae5713862dc48c51ada9.jpg","PictureDomain":"img52","Name":"精密恒溫水箱哪家好","Type":"ST-LTO","Descrip":"大型外循環(huán)恒溫水箱廣泛用于設(shè)備工廠、化工、石油、醫(yī)學(xué)、物理、計(jì)量、高等院校、電子儀表、科研機(jī)構(gòu)等領(lǐng)域。溫度范圍:-25~100℃;恒溫精度:≤±0.2℃,大型恒溫水箱。","CompanyName":"南京恒星實(shí)驗(yàn)設(shè)備有限公司","CompanyID":"129300","MarketPrice":"0","PsOrder":"0","PgID":"110","MaxOrder":"0","CityID":"86","City":"南京市","Address":"南京市","PropertysValue":"","HitNumber":"386","FrontShow":"0","IsCharges":"1","Year":"1","StarNum":"1","UpdateAndClientSort":"51558917","StandUrl":"/st129300","UpdateTime":"2024/12/23 0:37:03","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":"102728728","UserID":"142289","PriceType":"0","PictureID":"1686186","CompanyTypeID":"5","Tag":"","LinkMan":"張密德","TelPhone":"025-58531537","ClassName":"其它","ComProduct":"恒溫槽,冷卻水循環(huán)裝置,人工氣候箱,光照培養(yǎng)箱,生化培養(yǎng)箱,CO2培養(yǎng)箱,高低溫試驗(yàn)箱,高低溫交變濕熱試驗(yàn)箱,鹽霧腐蝕試驗(yàn)箱,步入式試驗(yàn)室","BrandNameCH":"","IsShow":"1","MarketPrice2":"0","RetailPrice":"0","ComHitnumber":"27197","MarketUpdateTime":"","CreateTime":"2018/2/4 3:27:25","Flag":"1","PackageName":"營銷寶會(huì)員","ClientSort":"0","CsName":"","Reprint":"2","FeedBackMsg":"","EnUrl":"","MobilePhone":"15851853397"},{"ID":"2932731","Picture":"dabac5fac07fb39af164af1576f8e91aaf8f5c37a29ca9c2a4d7d06970155b83d31b20febcc41227.png","PictureDomain":"img65","Name":"國產(chǎn)變壓器直流電阻測試儀廠家","Type":"","Descrip":"HD2045E變壓器直流電阻測試儀采用全新電源技術(shù),體積小、重量輕、輸出電流大等特點(diǎn)。整機(jī)由單片機(jī)控制,自動(dòng)化程度高,具有自動(dòng)放電功能。儀器測試精度高,操作簡便,可實(shí)現(xiàn)變壓器直阻的快速測量。","CompanyName":"上海端懿電氣科技有限公司","CompanyID":"129235","MarketPrice":"0","PsOrder":"0","PgID":"110","MaxOrder":"0","CityID":"394","City":"上海","Address":"上海","PropertysValue":"","HitNumber":"70","FrontShow":"0","IsCharges":"1","Year":"1","StarNum":"1","UpdateAndClientSort":"51558917","StandUrl":"/st129235","UpdateTime":"2024/12/23 0:37:00","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":"102932731","UserID":"142224","PriceType":"0","PictureID":"1680366","CompanyTypeID":"5","Tag":"","LinkMan":"張先生","TelPhone":"86-021-69973262","ClassName":"其它","ComProduct":"高壓測試裝置,變壓器試驗(yàn)設(shè)備,絕緣材料,電力計(jì)量儀器儀表","BrandNameCH":"","IsShow":"1","MarketPrice2":"0","RetailPrice":"0","ComHitnumber":"28197","MarketUpdateTime":"","CreateTime":"2024/3/20 19:02:33","Flag":"1","PackageName":"營銷寶會(huì)員","ClientSort":"0","CsName":"","Reprint":"2","FeedBackMsg":"","EnUrl":"","MobilePhone":"18049958167"},{"ID":"2872020","Picture":"mt0008/3dc9911d17df6b89b026ef09e0df65406ec7aedc12b5a12edcd8fd2488fe9834ed86a838dc2d9923.jpg","PictureDomain":"img58","Name":"HYD-3000型料斗混合機(jī)多少錢","Type":"HYD-2000型","Descrip":"HYD-2000型對(duì)夾式料斗混合機(jī)能完成自動(dòng)提升、混合、下降等功能。配一臺(tái)料斗混合機(jī)及多個(gè)不同規(guī)格的混合料斗,就能滿足大批量、多品種的混合要求,是藥廠總混的理想設(shè)備","CompanyName":"武漢恒達(dá)昌機(jī)械設(shè)備有限公司","CompanyID":"133458","MarketPrice":"0","PsOrder":"0","PgID":"110","MaxOrder":"0","CityID":"182","City":"武漢市","Address":"武漢市","PropertysValue":"","HitNumber":"93","FrontShow":"0","IsCharges":"1","Year":"1","StarNum":"1","UpdateAndClientSort":"51558916","StandUrl":"/st133458","UpdateTime":"2024/12/23 0:36:31","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":"102872020","UserID":"146448","PriceType":"0","PictureID":"1797007","CompanyTypeID":"5","Tag":"","LinkMan":"徐寶林","TelPhone":"86-027-89353268","ClassName":"其它","ComProduct":"產(chǎn)品主要用于固體制劑工藝設(shè)備領(lǐng)域——IBC無塵轉(zhuǎn)運(yùn)及總混系統(tǒng)、重力加料系統(tǒng)、真空上料系統(tǒng)及高效清洗系統(tǒng)設(shè)備。","BrandNameCH":"","IsShow":"1","MarketPrice2":"0","RetailPrice":"0","ComHitnumber":"16870","MarketUpdateTime":"","CreateTime":"2023/12/16 14:14:15","Flag":"1","PackageName":"營銷寶會(huì)員","ClientSort":"0","CsName":"","Reprint":"2","FeedBackMsg":"","EnUrl":"","MobilePhone":"13419620038"}]
所有評(píng)論僅代表網(wǎng)友意見,與本站立場無關(guān)。