农业科学与技术：英文版
農業科學與技術：英文版
농업과학여기술：영문판
Agricultural Science ＆ Technology
2012年
5期
979-983
,共5页
冬小麦%弱光%群体光合速率%旗叶%叶绿素含量
鼕小麥%弱光%群體光閤速率%旂葉%葉綠素含量
동소맥%약광%군체광합속솔%기협%협록소함량
Winter wheat%Low radiation%CAP,Flag leaf%Chlorophyll content
[目的]研究长期弱光对冬小麦（Triticum aestivumi L.）群体光合速率（CAP）以及上3叶特别是旗叶光合特性的影响。[方法]以耐弱光性不同的冬小麦品种扬麦158和扬麦11为材料，设不遮光（s。）、从拔节至成熟期遮去小麦冠层自然光强的22％（S，）和33％（s：）3个处理，测定小麦CAP、上3叶的光合速率（Po）、旗叶叶绿素含量以及籽粒产量。[结果]扬麦158和扬麦11CAP随遮光强度的增强而显著下降；长期弱光下，旗叶Pn显著下降，倒2叶只无明显变化，而倒3叶只则显著上升，从而部分地补偿了旗叶只的降低。该补偿效应因遮光强度和品种而异：s。处理的补偿效应大于s：处理，扬麦158的补偿效应大于扬麦11。在旗叶光合速率高值持续期内，长期遮光降低了扬麦158和扬麦11总叶绿素、叶绿素a和b的含量，以及叶绿素a／b值。[结论]弱光下，旗叶叶绿素a含量以及叶绿素a／b值下降引起其只显著降低，从而使得CAP吩显降低，最终导致籽粒产量显著下降。该研究可为长江中下游地区的小麦生产提供重要的理论依据。
[目的]研究長期弱光對鼕小麥（Triticum aestivumi L.）群體光閤速率（CAP）以及上3葉特彆是旂葉光閤特性的影響。[方法]以耐弱光性不同的鼕小麥品種颺麥158和颺麥11為材料，設不遮光（s。）、從拔節至成熟期遮去小麥冠層自然光彊的22％（S，）和33％（s：）3箇處理，測定小麥CAP、上3葉的光閤速率（Po）、旂葉葉綠素含量以及籽粒產量。[結果]颺麥158和颺麥11CAP隨遮光彊度的增彊而顯著下降；長期弱光下，旂葉Pn顯著下降，倒2葉隻無明顯變化，而倒3葉隻則顯著上升，從而部分地補償瞭旂葉隻的降低。該補償效應因遮光彊度和品種而異：s。處理的補償效應大于s：處理，颺麥158的補償效應大于颺麥11。在旂葉光閤速率高值持續期內，長期遮光降低瞭颺麥158和颺麥11總葉綠素、葉綠素a和b的含量，以及葉綠素a／b值。[結論]弱光下，旂葉葉綠素a含量以及葉綠素a／b值下降引起其隻顯著降低，從而使得CAP吩顯降低，最終導緻籽粒產量顯著下降。該研究可為長江中下遊地區的小麥生產提供重要的理論依據。
[목적]연구장기약광대동소맥（Triticum aestivumi L.）군체광합속솔（CAP）이급상3협특별시기협광합특성적영향。[방법]이내약광성불동적동소맥품충양맥158화양맥11위재료，설불차광（s。）、종발절지성숙기차거소맥관층자연광강적22％（S，）화33％（s：）3개처리，측정소맥CAP、상3협적광합속솔（Po）、기협협록소함량이급자립산량。[결과]양맥158화양맥11CAP수차광강도적증강이현저하강；장기약광하，기협Pn현저하강，도2협지무명현변화，이도3협지칙현저상승，종이부분지보상료기협지적강저。해보상효응인차광강도화품충이이：s。처리적보상효응대우s：처리，양맥158적보상효응대우양맥11。재기협광합속솔고치지속기내，장기차광강저료양맥158화양맥11총협록소、협록소a화b적함량，이급협록소a／b치。[결론]약광하，기협협록소a함량이급협록소a／b치하강인기기지현저강저，종이사득CAP분현강저，최종도치자립산량현저하강。해연구가위장강중하유지구적소맥생산제공중요적이론의거。
[Objective] The aim was to study on the effects of long-term low radiation on canopy apparent photosynthetic rate （CAP） and photosynthetic properties of top three leaves of winter wheat, especially the flag leaf. [Method] Two winter wheat （Triticum aestivum L） cultivars, Yangmai 158 and Yangmai 11, which differed in low radiation resistance, were used to measure the CAP, photosynthetic rate （Pn） of the top three leaves, chlorophyll content of flag leaf and grain yield. In the test, three treatments were designed from jointing to maturity, as follows： control without shad- ing （So）, S1 and S2 treatments with 22% and 33% sunshine shaded. [Result] CAP of Yangmai 158 and Yangmai 11 declined with shading. Under low radiation, Pn of flag leaf declined significantly, while no obvious effects were found on Pn of the 2nd leaf, and Pn of the 3rn leaf increased significantly, which partially compensated the decrease of Pn of the flag leaf. In addition, the compensation effect differed in shading and cultivars： compensation effect in S1 group was higher than that of S2 and effect of Yangmai 158 was higher than that of Yangmai 11. During the period of high Pn. shading decreased the content of total chlorophyll, chlorophyll a, b, and a/b. [Conclusion] Under low radiation, the decrease of chlorophyll a and a/b led to substantial declining of Pn. and CAP declined accordingly, finally resulting in drop of grain yield. The research provides important theoretical basis for wheat production in the middle and lower reaches of Yangtze River.
