不同培養方法對種子發芽的影響
種zhong子zi檢jian測ce是shi我wo們men對dui優you劣lie品pin種zhong種zhong子zi進jin行xing區qu分fen的de最zui重zhong要yao的de方fang法fa,這zhe樣yang可ke以yi避bi免mian優you劣lie種zhong子zi的de混hun亂luan對dui農nong業ye生sheng長chang帶dai來lai的de不bu便bian,也ye是shi確que保bao農nong業ye豐feng收shou的de最zui重zhong要yao的de措cuo施shi。種zhong子zi的de發fa芽ya時shi我wo們men對dui種zhong子zi品pin質zhi進jin行xing檢jian測ce的de重zhong要yao指zhi標biao,也ye是shi我wo們men將jiang種zhong子zi進jin行xing分fen類lei的de重zhong要yao科ke學xue依yi據ju,種zhong子zi發fa芽ya率lv的de高gao低di直zhi接jie影ying響xiang了le種zhong子zi的de經jing營ying。我wo們men在zai對dui種zhong子zi發fa芽ya率lv進jin行xing研yan究jiu的de時shi候hou,都dou是shi在zai條tiao件jian比bi較jiao好hao的de組培培養室中(zhong)完(wan)成(cheng)的(de)。因(yin)此(ci),我(wo)們(men)采(cai)用(yong)植(zhi)物(wu)培(pei)養(yang)箱(xiang)培(pei)養(yang)和(he)室(shi)溫(wen)培(pei)養(yang)對(dui)不(bu)同(tong)年(nian)限(xian)的(de)苜(mu)蓿(xu)品(pin)種(zhong)種(zhong)子(zi)進(jin)行(xing)了(le)發(fa)芽(ya)率(lv)測(ce)定(ding),初(chu)步(bu)評(ping)定(ding)了(le)各(ge)品(pin)種(zhong)的(de)種(zhong)子(zi)品(pin)質(zhi),為(wei)選(xuan)擇(ze)優(you)質(zhi)品(pin)種(zhong)、提高播種質量及牧草產業化發展提供依據。
過(guo)長(chang)的(de)儲(chu)藏(zang)期(qi)會(hui)導(dao)致(zhi)種(zhong)子(zi)營(ying)養(yang)物(wu)質(zhi)因(yin)呼(hu)吸(xi)作(zuo)用(yong)等(deng)方(fang)式(shi)大(da)量(liang)消(xiao)耗(hao),最(zui)終(zhong)導(dao)致(zhi)種(zhong)子(zi)活(huo)力(li)降(jiang)低(di)。此(ci)外(wai),隨(sui)著(zhe)儲(chu)藏(zang)時(shi)間(jian)的(de)延(yan)長(chang),種(zhong)子(zi)含(han)水(shui)量(liang)也(ye)在(zai)逐(zhu)步(bu)降(jiang)低(di),而(er)含(han)水(shui)量(liang)的(de)減(jian)少(shao)降(jiang)低(di)了(le)種(zhong)皮(pi)的(de)滲(shen)透(tou)力(li)和(he)種(zhong)胚(pei)的(de)活(huo)力(li)。當(dang)種(zhong)子(zi)的(de)含(han)水(shui)量(liang)低(di)於(yu)安(an)全(quan)水(shui)分(fen)下(xia)限(xian)後(hou),水(shui)分(fen)可(ke)能(neng)就(jiu)成(cheng)為(wei)了(le)種(zhong)子(zi)萌(meng)發(fa)的(de)限(xian)製(zhi)因(yin)子(zi),從(cong)而(er)降(jiang)低(di)了(le)種(zhong)子(zi)的(de)萌(meng)發(fa)率(lv)。苜(mu)蓿(xu)種(zhong)子(zi)因(yin)普(pu)遍(bian)存(cun)在(zai)著(zhe)硬(ying)實(shi)現(xian)象(xiang),延(yan)長(chang)了(le)其(qi)貯(zhu)存(cun)時(shi)間(jian)。影(ying)響(xiang)種(zhong)子(zi)貯(zhu)藏(zang)的(de)主(zhu)要(yao)環(huan)境(jing)因(yin)素(su)為(wei)溫(wen)度(du)、濕(shi)度(du)和(he)通(tong)風(feng)狀(zhuang)況(kuang)。種(zhong)子(zi)含(han)水(shui)量(liang)和(he)貯(zhu)藏(zang)溫(wen)度(du)是(shi)影(ying)響(xiang)種(zhong)子(zi)在(zai)貯(zhu)藏(zang)期(qi)間(jian)生(sheng)活(huo)力(li)和(he)活(huo)力(li)保(bao)持(chi)的(de)關(guan)鍵(jian)因(yin)素(su)。隨(sui)著(zhe)紫(zi)花(hua)苜(mu)蓿(xu)種(zhong)子(zi)在(zai)貯(zhu)藏(zang)期(qi)間(jian)的(de)含(han)水(shui)量(liang)從(cong)6 %增加至18 %,種子的發芽率和貯藏力急劇下降。
因yin此ci,實shi踐jian中zhong含han水shui量liang高gao的de種zhong子zi,應ying先xian在zai通tong透tou性xing好hao的de容rong器qi中zhong幹gan燥zao後hou再zai在zai密mi閉bi的de容rong器qi中zhong保bao存cun。適shi宜yi的de環huan境jing條tiao件jian是shi種zhong子zi萌meng發fa的de重zhong要yao因yin素su。有you研yan究jiu認ren為wei,光guang照zhao因yin素su不bu影ying響xiang苜mu蓿xu種zhong子zi的de發fa芽ya率lv,但dan與yu苜mu蓿xu芽ya的de百bai株zhu重zhong有you關guan,苜mu蓿xu種zhong子zi生sheng長chang的de最zui適shi溫wen度du為wei25~30℃,最適濕度為 70%~80%。本試驗研究表明:水分、溫度、光照條件均適宜的植物培養箱培養的種子發芽率要高於室溫條件下培養的種子發芽率。另外,種子萌發需要適宜的 pH 值。中國糧油儀器網 http://www.98fo.cn/



