一、生物學特征特性
1.植物學特征
絲si瓜gua根gen係xi發fa達da,吸xi收shou能neng力li強qiang。莖jing蔓man性xing,五wu棱leng,綠lv色se,分fen枝zhi力li強qiang。每mei節jie有you卷juan須xu。葉ye片pian為wei掌zhang狀zhuang或huo心xin髒zang形xing。雌ci雄xiong異yi花hua同tong株zhu,花hua冠guan黃huang色se,雄xiong花hua序xu總zong狀zhuang,雌ci花hua單dan生sheng,子zi房fang下xia位wei。果guo實shi短duan圓yuan柱zhu形xing至zhi長chang圓yuan柱zhu形xing,有you棱leng或huo無wu棱leng,表biao麵mian有you皺zhou或huo平ping滑hua。種zhong子zi橢tuo圓yuan形xing、扁平。普通絲瓜種子較薄,表麵平滑,邊緣有翅,灰白色或黑色,千粒重100g-120g.有棱絲瓜種子厚,黑色,邊緣無翅,千粒重220g左右。
2.對環境條件的要求
絲瓜是喜溫喜光的作物。如何防治絲瓜爛花的種植地適宜有機質豐富、略lve帶dai堿jian性xing和he比bi較jiao濕shi潤run的de土tu壤rang生sheng長chang。但dan忌ji澇lao怕pa漬zi。在zai排pai水shui不bu良liang的de情qing況kuang下xia,結jie瓜gua少shao,瓜gua身shen短duan,瓜gua莖jing小xiao,產chan量liang低di。所suo以yi,在zai生sheng產chan上shang必bi須xu選xuan擇ze宜yi絲si瓜gua所suo適shi應ying生sheng長chang環huan境jing條tiao件jian,否fou則ze,影ying響xiang絲si瓜gua絡luo的de品pin質zhi和he產chan量liang。
絲瓜種子的發芽溫度一般在12℃以上,發芽速度隨著溫度提高而加快。絲瓜耐高溫,出苗和苗期生長的適宜溫度為22-24℃,開花結果的適宜溫度為28-30℃,氣溫高於35℃shi,shengchangshijianruo,shenzhichuxiandiaoweieryingxiangxianleihejieshi。zaigualeizhongyisiguazuinaishi,kaihuajieguoshengqiyaoqiuwendugenggao,zaiyanredexiaqiuzhiyaobuqueshuifei,kaihuajieguoyizhihenwangsheng。yibanzaiwendushiyi、風較小和夜間伴有露水的天氣最有利於絲瓜的結實和生長。
二、類型與品種
供蔬菜用的絲瓜,在植物學上有兩個種,即普通絲瓜和棱角絲瓜。
1.普通絲瓜果實為長圓筒形
嫩果有密毛,無棱,皮光滑或具細皺紋,肉細嫩。長江流域優良的品種有南京長絲瓜、棒錘絲瓜、上海香絲瓜、長沙肉絲瓜、武漢漢白玉霜等。
2.有棱絲瓜,瓜為棒形,有明顯的棱角,種瓜纖維發達
普通絲瓜果皮薄,在南方容易受瓜蠅為害,而有棱絲瓜果皮厚,有棱絲瓜著名的品種有青皮綠、烏皮絲瓜等。
三、栽培技術
1.播種育苗
苗床準備:絲瓜苗床應選擇避風向陽、太陽光照射時間長的地方作為育苗地,並提前10-15d施好苗床基、種肥,應以腐熟的有機肥為主。播種前1-3d整地製好營養缽,並覆蓋好薄膜,以待播種。
播種:絲瓜播種宜三月底四月初進行。播種時:一是采用浸種催芽,先將種子曬2-3d,爾後用溫水浸種約6h(種子充分吸水為準)然ran後hou將jiang種zhong子zi放fang入ru溫wen箱xiang催cui芽ya。待dai種zhong芽ya露lu白bai即ji可ke播bo於yu營ying養yang缽bo或huo方fang格ge內nei。二er是shi用yong幹gan燥zao種zhong子zi直zhi接jie播bo於yu營ying養yang缽bo或huo方fang格ge內nei,但dan苗miao床chuang土tu必bi須xu保bao持chi濕shi潤run。否fou則ze因yin水shui分fen不bu足zu影ying響xiang出chu苗miao。播bo種zhong後hou應ying及ji時shi覆fu蓋gai地di膜mo,並bing搭da好hao小xiao拱gong棚peng保bao溫wen,爭zheng取qu早zao出chu苗miao。
苗床管理:種子播入苗床後,要抓緊對苗床的管理。在未出苗前,苗床膜內溫度宜20-30℃為好。這樣,經浸種催芽的種子2- 3d可出苗,幹燥種子播種約6-7dyekechumiao。chumiaohou,qianqiyinqiwendi,miaolingxiao,yibaonuanfangdongweizhu,zhonghouqisuizheqiwenshenggao,miaolingzengda,zhongguononglinwangjianyiyingjinxingtongfenglianmiao。tongfenglianmiaogenjuqiwengaodilinghuojinxing,ruyinyutianqidikeyibutongfeng,qingtianqiwengaobixujiemotongfeng,bingzuodaoxianxiaotongfeng,houdatongfeng,yizaiqian2-3d可不蓋膜。
定穴移植:移栽一般掌握在穀雨前後,即當苗長出1-2片真葉時可帶土移栽,移栽前7-10d,將確定移植瓜苗的行上施足基肥,每畝施入畜肥20kg、磷肥50-75kg,鉀肥15-20kg.施好後及時進行土地翻耕,並精細整地,噴好除草劑,覆蓋好地膜待移栽。絲瓜絡栽種密度以500株左右為宜(畝)其行距3m,株距0.4-0.5m.
搭架引藤:絲瓜定植後即可進行搭架以1.5х1.5 m距離立杆,架高2 m.棚頂用小竹、鉛絲或繩子縱橫紮成正方形,搭架要結實牢固,能經得起鮮瓜重量的負荷和大風的襲擊。待瓜藤長到2.5m以yi上shang時shi可ke引yin藤teng上shang架jia,瓜gua藤teng上shang架jia時shi,不bu管guan瓜gua藤teng長chang短duan與yu否fou,但dan上shang架jia後hou的de瓜gua藤teng腦nao的de部bu位wei必bi須xu保bao持chi一yi致zhi,有you利li於yu瓜gua藤teng在zai架jia上shang平ping衡heng伸shen展zhan。瓜gua藤teng上shang架jia以yi後hou要yao做zuo到dao經jing常chang理li藤teng,使shi瓜gua藤teng在zai架jia上shang分fen布bu均jun勻yun。
2.田間管理
大麵積的商品生產絲瓜的管理工作很多。主要的有設立支架、澆水施肥、中耕、除草、培壟、人工引蔓、綁蔓等工作。在栽培管理上應著重抓住以下幾個環節:
(1)zhengdiwayaquxionghua。guatengshangjiahoubuduandijinxingzhengzhiwayahequchuxionghua。siguayibanmeizhuzhiliuyitiaozhuteng,duiqiyudecezhihezhuiyayaosuishiqingchu。siguashicixionghuatongjieweizhesheng,xionghuashuliangzhiduo,weijianshaoyangfendexiaohao,kejiang90%以上的雄花蕾及時摘掉,摘雄花時要防止碰傷同節位上雌蕾。
(2)留liu優you瓜gua去qu劣lie瓜gua。絲si瓜gua的de天tian性xing是shi除chu基ji部bu節jie位wei外wai,幾ji乎hu每mei個ge節jie位wei上shang都dou有you幼you瓜gua著zhe生sheng,留liu瓜gua過guo多duo,既ji不bu能neng提ti高gao產chan量liang,且qie產chan生sheng大da量liang劣lie質zhi瓜gua絡luo。經jing長chang期qi生sheng產chan證zheng實shi,一yi般ban每mei株zhu在zai每mei瓜gua期qi隻zhi選xuan留liu優you瓜gua一yi條tiao為wei好hao,最zui多duo不bu能neng超chao過guo2tiao。xuanliuyouzhiguashiyaoshiyouguashangxiayuncheng,guatiaozhi,guabingcuzhuangbuxichang。siguayouguoshilieguaxianxiangbijiaozhong,lieguayuanyinchuyouguadewaipishengchangsudujiaoman,picengneidegualuochongshijiasueryinqiwai,zhizhushengchangguowang,yingyangshengchangyushengzhishengchangbilishitiaoyeshizaochenglieguadezhongyaoyinsu。suoyizaizaipeishang,helipinghengshifei,quyouguayaoshishi,zuihaozaixuanliuyouzhixiaoguaqiandejigejieweishangzanliuyitiaoyougua,yizhengduoyangfen,dangxuanliudeyouzhiguachangdaojibenshangbuhuipolieshizaiquchuqianmiandexiaogua,duijiexiadeguabunengrenqigezhizaijiadingshang,yingjishifangxiaxuankong。ruoyouguachuxiangongxing,xujingrengongzhengzhi,keyongxixiandexiaoshikuaixuanguazaihuadishang。
(3)合理追肥:要實現產量一般正常年份為100-130kg,並出現過150 kgyishangdegaochantian,yaoshixiansiguadezhengchangchanliang,bixuyouzugoudefeiliaotouru。siguayishengzhong,zaijifeishizudejichushang,duibutongdejieguaqi,jinxingduocizhuifei。toucizhuifeiyingzhangwodiyiqiyouguazhijingchangdao4cm以上時進行,小於4cm追肥容易導致營養生長過旺。每畝施標氮15 kg左右。第一次追肥後隔10d再施一次瓜果膨大充實肥,每畝施標氮20-25 kg.以後每隔15d左右施一次追肥,每次每畝施標肥氮20-25 kg,連施2-3次,但具體要視絲瓜生長勢和結瓜量多少,來確定施肥次數和每次施用量多少,追肥用方法以澆施為好,並離根部50cm以外處施入,以防近根產生肥害。並做到根基左右輪流交替施用。
(4)防治病蟲:在絲瓜栽培中,病蟲危害較多,如花葉病、病毒病、角斑病、霜黴病、地老虎、紅蜘蛛、小卷葉蟲、瓜野螟等。但影響產量較大的主要在霜黴病、綿腐病、瓜野螟等。
絲瓜霜黴病:siguashuangmeibingshisiguashengchanshangchangjiandeyizhongbinghai。yibannianfenweihaibushenyanzhong,danzaishiyifabinghuanjingtiaojianxia,keyinqidafasheng,shidaliangyepiankusi,yingxiangguaguochanliang。fangzhiyijian:農nong業ye防fang治zhi與yu藥yao劑ji防fang治zhi相xiang結jie合he,農nong業ye防fang治zhi,要yao適shi當dang配pei施shi磷lin鉀jia肥fei,以yi提ti高gao植zhi株zhu的de抗kang病bing能neng力li。病bing害hai初chu見jian時shi,應ying及ji時shi摘zhai除chu病bing葉ye,以yi減jian少shao病bing菌jun擴kuo展zhan。藥yao劑ji防fang治zhi,可ke選xuan500倍甲霜靈早期灌根,初發病時用2000倍瑞毒黴進行噴霧,每隔7d一次連防1-2次。
瓜野螟:一年發生數代,以7-9月發生量大。並世代重迭,為害嚴重。在絲瓜上危害,主要啃食葉肉,嚴重時造成大麵積葉片僅留葉脈,影響產量和質量。防治方法:當幼蟲盛發時,可用3000倍菊脂類農藥等農藥進行噴霧。
四、采收留種
絲瓜定植後40餘天出現雌花,開始結瓜,50餘天能采收,一般6月份始收,7-8月yue份fen大da量liang上shang市shi。每mei隔ge一yi天tian采cai收shou一yi次ci,盛sheng收shou期qi可ke每mei天tian采cai收shou。絲si瓜gua果guo實shi采cai摘zhai要yao及ji時shi,過guo嫩nen影ying響xiang產chan量liang和he品pin質zhi,過guo老lao熟shu影ying響xiang後hou期qi結jie瓜gua。一yi般ban以yi瓜gua體ti轉zhuan變bian硬ying,瓜gua柄bing轉zhuan黃huang,絲si瓜gua褐he斑ban病bing的de防fang治zhi措cuo施shi瓜gua蒂di變bian軟ruan並bing有you黃huang色se環huan帶dai,手shou捏nie可ke聽ting到dao輕qing微wei暴bao裂lie聲sheng,瓜gua蒂di凹ao度du逐zhu步bu變bian大da時shi為wei采cai摘zhai標biao準zhun。絲si瓜gua雖sui可ke采cai收shou至zhi霜shuang降jiang,但dan秋qiu涼liang後hou生sheng長chang緩huan慢man,品pin質zhi不bu好hao,一yi般ban在zai9月中旬拉藤。
選瓜留種:為wei保bao絲si瓜gua品pin種zhong純chun正zheng和he提ti高gao品pin質zhi,必bi須xu十shi分fen注zhu重zhong留liu種zhong工gong作zuo。由you於yu絲si瓜gua品pin種zhong較jiao多duo,受shou昆kun蟲chong和he風feng的de媒mei介jie,使shi品pin種zhong受shou異yi性xing較jiao大da,故gu每mei年nian需xu經jing提ti純chun複fu壯zhuang工gong作zuo並bing做zuo到dao隔ge離li製zhi種zhong。瓜gua種zhong選xuan留liu以yi瓜gua身shen挺ting直zhi勻yun稱cheng,長chang度du70cm以上、子房室數多的優質絲瓜作為良種德育。
五、食用方法
食用部位為嫩果。質地脆嫩,色澤青綠,味清爽口,無論做湯或炒食,風味頗佳,宜熟食。
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