一、人工栽培紫菜的生長過程
紫菜的人工栽培分絲狀體培育和葉狀體養成兩個階段。
絲狀體培育階段:春(chun)末(mo)取(qu)成(cheng)熟(shu)的(de)葉(ye)狀(zhuang)體(ti)經(jing)陰(yin)幹(gan)刺(ci)激(ji)後(hou),放(fang)入(ru)盛(sheng)有(you)海(hai)水(shui)的(de)容(rong)器(qi)內(nei)放(fang)散(san)果(guo)孢(bao)子(zi),當(dang)放(fang)散(san)量(liang)達(da)到(dao)要(yao)求(qiu)時(shi),撈(lao)出(chu)葉(ye)狀(zhuang)體(ti)。把(ba)孢(bao)子(zi)水(shui)按(an)一(yi)定(ding)比(bi)例(li)噴(pen)灑(sa)到(dao)已(yi)放(fang)有(you)貝(bei)殼(ke)的(de)培(pei)育(yu)池(chi)內(nei),果(guo)孢(bao)子(zi)即(ji)附(fu)著(zhe)到(dao)貝殼上,萌發鑽入貝殼內生長成絲狀體。秋季水溫下降時,貝殼內絲狀體成熟並放散殼孢子,將維尼侖網簾放入培養池內采苗,不斷攪動池水使殼孢子均勻附著網簾上,然後張掛到海上人工筏架上,即進入葉狀體養成階段。在絲狀體培育過程中,要定期洗刷貝殼、換水、施肥、調光等,以保證其正常生長發育。
葉狀體養成階段:有三種栽培方式:①支zhi柱zhu式shi栽zai培pei。在zai適shi合he葉ye狀zhuang體ti生sheng長chang的de潮chao間jian帶dai灘tan塗tu上shang平ping行xing安an設she木mu樁zhuang或huo竹zhu樁zhuang作zuo支zhi柱zhu,網wang簾lian水shui平ping張zhang掛gua在zai支zhi柱zhu上shang進jin行xing栽zai培pei。此ci法fa產chan量liang低di,每mei平ping方fang米mi網wang簾lian生sheng產chan紫zi菜cai100克~500克,中國已不使用。在日本仍是一種重要的生產方式。②banfudongfashizaipei。banfudongfajiazaizhangchaoshikeyipiaofuyushuimian,tuichaodaofajialuchushuimianshiyoukeyikaoduanzhijiaopingwendishuzaihaitanshang。banfudongfajiashezhizaichaojiandaideyidingchaoweishang,wanglianshuipingzhangguazaifajiadekonggenei。youyuwanglianzaituichaoshinengluchu、日曬(稱幹露),雜藻不易附生,有利於紫菜幼苗的發生和生長,且生長期長,紫菜的產量高,質量好,每平方米網簾生產紫菜500克~1000克。③quanfudongfashizaipei。zheshishihebuganludeqianhaiquzaipeifangshi。wanglianshuipingzhangguazaifazidekonggenei,zaipeiqijianwanglianpiaofuzaishuimianshang。ruguochumiaohao,guanlidedang,chanlianghebanfudongfashixiangjin。danyouyuwanglianbuganlu,duiyezhuangtidejiankangshengchangheduiyizhizazaodefanshengbuli,guzaiwanglianxiahaihoude20天~30天內,要適當幹露網簾。
當葉狀體生長到20厘米左右時應進行采收加工。壇紫菜約在11月中旬開始采收,條斑紫菜稍晚。通常10天~14天可采收一次,約采收7次~8次。
二、紫菜培育過程中常見的病害
絲狀體培育過程常見的病害有:黃斑病、泥紅病、綠變病、白圈病、龜紋病、鯊皮病、赤變病和白斑病。黃斑病和泥紅病是微生物病害;綠(lv)變(bian)病(bing)是(shi)生(sheng)理(li)性(xing)病(bing)害(hai),發(fa)病(bing)後(hou)如(ru)不(bu)及(ji)旱(han)處(chu)理(li)會(hui)使(shi)絲(si)狀(zhuang)體(ti)大(da)量(liang)死(si)亡(wang)。黃(huang)斑(ban)病(bing)發(fa)病(bing)時(shi)先(xian)在(zai)貝(bei)殼(ke)表(biao)麵(mian)產(chan)生(sheng)許(xu)多(duo)圓(yuan)形(xing)黃(huang)色(se)小(xiao)斑(ban)點(dian),後(hou)逐(zhu)漸(jian)擴(kuo)大(da)連(lian)片(pian)。可(ke)用(yong)1.005的低密度海水浸泡兩天或淡水浸泡1天,也可用10ppm對氨基苯磺酸浸泡15小時或2ppm高錳酸鉀浸泡15小時都有效,也可用漂白粉處理。泥紅病發病時貝殼表麵呈泥紅色,手摸有黏滑感,有臭腥味。可用0.01%漂白粉衝洗貝殼或用1.005dimiduhaishuijinpaoliangtian,yizhibingqingmanyan。lvbianbingfabingshibeikebiaomianhuanglvse,houbianbaisiwang。zhezhongbingshiyingyangbuzusuozhi,yingtianjiayingyangyanbingshidangjianshaoguangzhao。sizhuangtibinghaiduofashengzaishuiwengaodejijie,youqiyifashengzaipeiyanghaishuiweijingyangechulishi。yinci,peiyanghaishuijingyangeguolvhechendianshifangzhibinghaifashengdezhongyaotiaojian。
葉狀體養成過程常見的病害有:赤黴病、壺狀菌病、白腐病、綠變病、aizhongbinghelanmiaobing。yifashengzaihaiqufajiapaifangguoduoshi。chifubingyoufushengmeiyinqi,fabingshiyezhuangtishangyouhongsexiaobandian,houxunsukuoda,yezhuangtibuduancongbingbanchutuoluo。keyongsuanjianxingbiaomianhuohuaji、feilizibiaomianhuohuajidengshasijunsi,yekezaifabingchuqizengjiayezhuangtiganchushijianyizhifabing,lengzangfayikechuqubufenbingjun。huzhuangjunbingzaizhongguoshangweifaxian。baifubingyinyezhuangtiganchubuzu、水流不暢及光照不足所致。發病初期葉狀體前端變紅,後由黃綠變白,逐漸潰爛、liushi。fujiahewanglianpaifangbuyaoguomi,wanglianyaobengjin,baozhengzugoudeganchushijian,jishicaishou,shishuiliuchangtongdengkeyizhicibing。lvbianbingfabingshiyezhuangtibianlv,houfulanliushi。fabingqianjishixiajiangshuicengbingshifei,kefangzhihuojianhuanlvbianbingdesunshi。aizhongbingfabingshiyezhuangtizhousuo,sehuangdaihei,wuguangze,chenghoupigezhuang。cibingduoyougongchangfeishuipaifangshihaishuizhonghanyouduwuzhiyinqi,yingxiaochuhaiquwuranyuanhuobimianzaizhexiehaiqujinxingzaipei。lanmiaobingyibanzaiyoumiaoshifasheng,youzaotizhujiantuise,houjianduanbianbai,zaotiwanqu,fulanliushi。caimiaoshifangzhimiduguoda,fajiabujuyaoheli。ribencaiyongfabingqianjiangwanglianrulengkulengzangdebanfaxiaoguohenhao。
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