贵州农业科学
貴州農業科學
귀주농업과학
GUIZHOU AGRICULTURAL SCIENCES
2015年
6期
149-152
,共4页
周艳%韦小丽%李朝婵%陈训
週豔%韋小麗%李朝嬋%陳訓
주염%위소려%리조선%진훈
迷人杜鹃%遮阴度%种子萌发%芽苗生长
迷人杜鵑%遮陰度%種子萌髮%芽苗生長
미인두견%차음도%충자맹발%아묘생장
Rhododendron agastum%shading%seed germination%seedling growth
为给迷人杜鹃的抚育管理提供参考，采用盆栽法人工模拟光照条件，探索不同遮阴处理对迷人杜鹃种子萌发和芽苗生长的影响试验。结果表明：迷人杜鹃种子萌发率和萌发指数在30％遮阴处理时达到最大，分别为90．00％和2．46；随着光照的减弱而逐渐减小，在80％遮阴处理下最小，为40％和0．27。弱光照对种子萌发进程有一定的延迟作用，萌发活力指数随着光照的减弱而减小。不同遮阴处理的迷人杜鹃芽苗具有较大的形态学可塑性，30％遮阴处理的芽苗胚根长、胚轴长、芽苗活力指数和幼叶宽均最大，分别比全光照提高60．71％、29．91％、52．26％和33．33％；80％遮阴处理最小，分别比全光照降低59．09％、54．88％、74．32％和66．67％。随着遮阴度的增加，幼苗的根系活力降低，而总叶绿素含量先上升后降低，根系活力以30％遮阴处理最大，为3．49 mg／（g·h）；MDA 含量以80％遮阴处理最大，为13．42 nmol／g FW；叶绿素含量以50％遮阴处理最大，为75．32μg／g。遮阴度为30％的光照环境有利于迷人杜鹃盆栽育苗。
為給迷人杜鵑的撫育管理提供參攷，採用盆栽法人工模擬光照條件，探索不同遮陰處理對迷人杜鵑種子萌髮和芽苗生長的影響試驗。結果錶明：迷人杜鵑種子萌髮率和萌髮指數在30％遮陰處理時達到最大，分彆為90．00％和2．46；隨著光照的減弱而逐漸減小，在80％遮陰處理下最小，為40％和0．27。弱光照對種子萌髮進程有一定的延遲作用，萌髮活力指數隨著光照的減弱而減小。不同遮陰處理的迷人杜鵑芽苗具有較大的形態學可塑性，30％遮陰處理的芽苗胚根長、胚軸長、芽苗活力指數和幼葉寬均最大，分彆比全光照提高60．71％、29．91％、52．26％和33．33％；80％遮陰處理最小，分彆比全光照降低59．09％、54．88％、74．32％和66．67％。隨著遮陰度的增加，幼苗的根繫活力降低，而總葉綠素含量先上升後降低，根繫活力以30％遮陰處理最大，為3．49 mg／（g·h）；MDA 含量以80％遮陰處理最大，為13．42 nmol／g FW；葉綠素含量以50％遮陰處理最大，為75．32μg／g。遮陰度為30％的光照環境有利于迷人杜鵑盆栽育苗。
위급미인두견적무육관리제공삼고，채용분재법인공모의광조조건，탐색불동차음처리대미인두견충자맹발화아묘생장적영향시험。결과표명：미인두견충자맹발솔화맹발지수재30％차음처리시체도최대，분별위90．00％화2．46；수착광조적감약이축점감소，재80％차음처리하최소，위40％화0．27。약광조대충자맹발진정유일정적연지작용，맹발활력지수수착광조적감약이감소。불동차음처리적미인두견아묘구유교대적형태학가소성，30％차음처리적아묘배근장、배축장、아묘활력지수화유협관균최대，분별비전광조제고60．71％、29．91％、52．26％화33．33％；80％차음처리최소，분별비전광조강저59．09％、54．88％、74．32％화66．67％。수착차음도적증가，유묘적근계활력강저，이총협록소함량선상승후강저，근계활력이30％차음처리최대，위3．49 mg／（g·h）；MDA 함량이80％차음처리최대，위13．42 nmol／g FW；협록소함량이50％차음처리최대，위75．32μg／g。차음도위30％적광조배경유리우미인두견분재육묘。
To provide references for the R.agastum tending management,a pot culture experiment with artificial simulation of light conditions was conducted to explore the effects of different shading treatments on seed germination and seedling growth of R.agastum.Results:The seed germination rate and germination index of 30% shading treatment were the highest,respectively 90.00% and 2.46,and gradually decreased with decreasing light intensity,then reached the minimum at 80% shading treatment, respectively 40% and 0.27.Weak light put off seed germination process in certain degree,germination vigor index decreased with weakening light intensity.R.agastum with different shading treatment had great morphological plasticity,radical length,hypocotyl length,vigor index and young leaf width of 30%shading treatment were the highest,which were respectively 60.71%,29.91%,52.26% and 33.33%higher than full light treatment,that of 80% shading treatment were the lowest,59.09%,54.88%, 74.32% and 66.67% lower than full light treatment respectively.With increasing the shading degree, seedling root vigor decreased,while total chlorophyll content first increased and then decreased,root vigor of 30% shading treatment was the highest[3.49 mg/(g·h)],MDA content of 80% shading treatment was the highest(13.42 nmol/g FW),chlorophyll content of 50% shading treatment was the highest(75.32μg/g).30% shading treatment was beneficial for pot culture of seedlings of R.agastum.
