中山大学学报（自然科学版）
中山大學學報（自然科學版）
중산대학학보（자연과학판）
ACTA SCIENTIARUM NATURALIUM UNIVERSITATIS SUNYATSENI
2013年
5期
111-117
,共7页
红毛草%繁殖效力%繁殖策略%根冠比%种子寿命
紅毛草%繁殖效力%繁殖策略%根冠比%種子壽命
홍모초%번식효력%번식책략%근관비%충자수명
Rhynchelytrum repens(Willd.)C.E.Hubbard%reproductive effort%reproductive strategy%root shoot biomass ratio%seed longevity
从繁殖生态学的角度对红毛草Rhynchelytrum repens （Willd．）C.E．Hubbard 的繁殖特性进行了研究。采用盆栽试验与发芽试验，分别研究了4种不同种植密度下红毛草的资源分配情况和4年内红毛草的种子寿命与萌发情况。结果显示：①盆栽试验中，低密度种植红毛草的单株总生物量、茎叶生物量、根生物量与根冠比高于高密度种植差异达显著水平（p＜0.05）；花的生物量在相对低密度下低于高密度的量，差异显著（p＜0.05）；②高密度种植红毛草的 RE （Reproductive effort）值大于低密度种植的 RE 值，而且差异显著（p＜0.05），显示红毛草在生长胁迫下分配更多的资源到繁殖器官中；③发芽试验中，红毛草种子在高温胁迫下（45℃）发芽率显著下降（p＜0.05），但仍维持在一定的水平（30.2％），显示了红毛草对高温的适应能力；④红毛草种子的发芽率在贮藏两年后开始显著下降（p＜0.05），但在贮藏的第四年仍维持在一定的水平（11.1％），说明红毛草有较长的种子寿命；⑤红毛草种子发芽迅速，在发芽的第1天就开始萌动，发芽的高峰期出现在发芽的第2-3天。以上繁殖特性均与红毛草能够成为先锋植物密切相关。
從繁殖生態學的角度對紅毛草Rhynchelytrum repens （Willd．）C.E．Hubbard 的繁殖特性進行瞭研究。採用盆栽試驗與髮芽試驗，分彆研究瞭4種不同種植密度下紅毛草的資源分配情況和4年內紅毛草的種子壽命與萌髮情況。結果顯示：①盆栽試驗中，低密度種植紅毛草的單株總生物量、莖葉生物量、根生物量與根冠比高于高密度種植差異達顯著水平（p＜0.05）；花的生物量在相對低密度下低于高密度的量，差異顯著（p＜0.05）；②高密度種植紅毛草的 RE （Reproductive effort）值大于低密度種植的 RE 值，而且差異顯著（p＜0.05），顯示紅毛草在生長脅迫下分配更多的資源到繁殖器官中；③髮芽試驗中，紅毛草種子在高溫脅迫下（45℃）髮芽率顯著下降（p＜0.05），但仍維持在一定的水平（30.2％），顯示瞭紅毛草對高溫的適應能力；④紅毛草種子的髮芽率在貯藏兩年後開始顯著下降（p＜0.05），但在貯藏的第四年仍維持在一定的水平（11.1％），說明紅毛草有較長的種子壽命；⑤紅毛草種子髮芽迅速，在髮芽的第1天就開始萌動，髮芽的高峰期齣現在髮芽的第2-3天。以上繁殖特性均與紅毛草能夠成為先鋒植物密切相關。
종번식생태학적각도대홍모초Rhynchelytrum repens （Willd．）C.E．Hubbard 적번식특성진행료연구。채용분재시험여발아시험，분별연구료4충불동충식밀도하홍모초적자원분배정황화4년내홍모초적충자수명여맹발정황。결과현시：①분재시험중，저밀도충식홍모초적단주총생물량、경협생물량、근생물량여근관비고우고밀도충식차이체현저수평（p＜0.05）；화적생물량재상대저밀도하저우고밀도적량，차이현저（p＜0.05）；②고밀도충식홍모초적 RE （Reproductive effort）치대우저밀도충식적 RE 치，이차차이현저（p＜0.05），현시홍모초재생장협박하분배경다적자원도번식기관중；③발아시험중，홍모초충자재고온협박하（45℃）발아솔현저하강（p＜0.05），단잉유지재일정적수평（30.2％），현시료홍모초대고온적괄응능력；④홍모초충자적발아솔재저장량년후개시현저하강（p＜0.05），단재저장적제사년잉유지재일정적수평（11.1％），설명홍모초유교장적충자수명；⑤홍모초충자발아신속，재발아적제1천취개시맹동，발아적고봉기출현재발아적제2-3천。이상번식특성균여홍모초능구성위선봉식물밀절상관。
A greenhouse pot experiment and a lab germination test were carried out to determine the re-productive strategy of Rhynchelytrum repens (Willd.)C.E.Hubbard.The patterns of resource allocation in R.repens under four planting densities and the seed longevity and germination characteristics of R.re-pens in a 4-year period were investigated,respectively.Our results showed that:①the total biomass, shoot biomass,root biomass and root-shoot biomass ratio of R.repens under low planting densities were significantly (p<0.05 )higher than those under high planting densities,however,a contrasting pattern was observed for flower biomass;② the values of reproductive effort of R.repens under high planting densities were significantly (p<0.05 )higher than those under low planting densities,indicating that R. repens tends to allocate more resources to reproductive organs in situations of limited resources;③ the germination rate of R.repens seeds were significantly (p<0.05 )reduced by the high temperature (45℃),yet the relative high germination rate (30.2%)recorded at the high temperature indicated the tol-erance of R.repens to high temperatures;④the germination ability decreased significantly (p <0.05)inseeds stored for 2 years,however,the germination rate (11.1%)in seeds stored for 4 years showed thatthe seeds can retain their viability over a relatively long period of time;⑤ R.repens showed fast germina-tion,specifically,the seeds began to germinate on the first day of the germination test and most of themgerminated during the second or third day of the germination test.It could be concluded that R.repens asa pioneer species in many extreme environments was likely attributed to its reproduction propertiesrevealed by this study.
