【正文】 ferent concentrations of salt stress were NaCl single seed germination experiment (concentration gradient for 0, %, % percent, and seven gradient, %, %), the determination of germination rate, germination index, potential and vigor index, index. The results showed that the single under salt stress concentration of stress, along with the increase of seed germination, rape, germination index, germination and vigor index had different degrees, relative rate of salt, seeds to germinate time delay and germination process, The stress on rapeseed NaCl on seed germination, including the inhibition of the stress concentration of soybean NaCl % rate reached the inhibition of 50% respectively, concentration, 88% 88 for NaCl of % under the stress of two selected materials for the germination rate, Salt stress on seed germination, but low concentration of salt stress on seed germination. ShengHong rape seed than its rape seed salt resistance.Keywords: sodium chloride stress, Rape, Seed germination II/ II目錄目錄 摘要...................................................................1Abstract...............................................................2.................................................................2............................................................21. 2研究的目的和意義......................................................31. 3國(guó)內(nèi)外研究的現(xiàn)狀......................................................3...........................................................4............................................................4............................................................4............................................................4............................................................4........................................................4..............................................4........................................................5............................................................5..............................................5........................................6................................................6................................6....................................63．結(jié)果與分析........................................... ...............7....................................................7..........................7............................7..... ............................8 .............................10 總結(jié)..................................................................11 參考文獻(xiàn)..............................................................12 致謝..................................................................14 1 / 14前言 　油菜為十字花科，蕓苔屬，一年生草本。莖直立，分枝較少，株高3090cm?；~不發(fā)達(dá)，匍匐生長(zhǎng)，橢圓形，長(zhǎng)1020cm，有葉柄，大頭羽狀分裂，頂生裂片圓形或卵形，側(cè)生琴狀裂片5對(duì)，密被刺毛，有蠟粉。總狀無(wú)限花序，著生于主莖或分枝頂端。雄蕊6枚，為4強(qiáng)雄蕊。種子球形，紫褐色。白菜型油菜生育期變幅較大。油菜的階段發(fā)育比較明顯，冬性型油菜，春化階段要求0—10℃，需經(jīng)過(guò)15—30天；春性型介于春、冬型之間，對(duì)溫度要求不甚明顯。反之，則延緩發(fā)育。苗期時(shí)間長(zhǎng)，一般為60—90天。這個(gè)時(shí)期主要是葉片生長(zhǎng)和根系建成。這個(gè)時(shí)期是營(yíng)養(yǎng)生長(zhǎng)和生殖生長(zhǎng)兩旺階段。蕾苔期受類型、品種、溫度及栽培管理?xiàng)l件諸因素的影響，一般為30天左右。油菜的開(kāi)花順序：主莖先開(kāi)，分枝后開(kāi)；上部分枝先開(kāi)，下部分枝后開(kāi)；同一花序，則下部先開(kāi)，依次陸續(xù)向上開(kāi)放。油菜的子實(shí)期是從終花至種子成熟，一般為1個(gè)月左右。油菜是根深、枝葉繁茂、生長(zhǎng)期長(zhǎng)的作物。土壤PH在5—8，以弱酸或中性土壤最為適宜。 研究的目的和意義土壤鹽漬化問(wèn)題是困擾農(nóng)業(yè)生產(chǎn)的一大難題，世界上約有20％的可耕地及40％的灌溉地受到不同程度的鹽漬化影響168。我國(guó)約有鹽堿地2 6300萬(wàn)ll岔，其中，鹽堿耕地約有660萬(wàn)hm2怛o。因此，作物耐鹽性的提高，鹽漬土的生物治理和綜合開(kāi)發(fā)是未來(lái)農(nóng)業(yè)發(fā)展的重大課題H。在不同作物中，部分作物品種間的耐鹽性存在明顯差異D1，種子萌發(fā)期往往是對(duì)鹽堿脅迫十分敏感的時(shí)期∞o。在國(guó)內(nèi)外關(guān)于鹽脅迫對(duì)油菜種子萌發(fā)的文獻(xiàn)有很多，從整體上看尤以我國(guó)學(xué)者在這方面的研究最為詳盡，如：我國(guó)學(xué)者李春龍?jiān)凇胞}脅迫對(duì)油菜種子萌發(fā)的影響”[2]一文中曾對(duì)5個(gè)油菜品種用不同濃度的NaCl(％、％、％、％％)進(jìn)行實(shí)驗(yàn)研究，并提出了：“不同的品種油菜種子萌發(fā)的耐鹽性存在較大的差異”。為油菜的種植提供了一些優(yōu)良品種。 NaCl、75％濃度酒精消毒試劑。