芦苇

With the parameters from published literature and experiments, we conducted forward analysis to compare soil organic carbon, carbon sequestration rate and soil total nitrogen dynamics of four different ecosystem types bare ground, Scirpus mariqueter, Phragmites australis, S.

通过构建九段沙生态系统碳氮模型并结合实测数据比较了互花米草入侵后生态系统土壤有机碳储量、碳封存速率和土壤总氮与其在土著占优势的3类生态系统（裸地、海三棱藨草、芦苇）中的差异，结果表明互花米草入侵的生态系统，其土壤有机碳储量高于裸地和海三棱藨草生态系统，却低于芦苇生态系统。

There were generally reproductive growth in each age class ramets of Carex kirganica as well as that in Scirpus planiculmis. Furthermore, the more or less of the reproductive allocation was certain and that is the result of reproductive trade-off and the adaptation to their habitats.

长秆苔草和紧穗三棱草各龄级分株均进行有性生殖，并保持一定量的生殖分配大小，是适应生境的生殖策略权衡的结果。12个不同水分梯度生境芦苇生殖分配RA Ⅰ为5.82％～16.31％，生殖生长比率Rrg为10.68%~16.35%，2个生境毛芦苇RAI分别为9.09%和13.98%，生殖生长比率分别为22.07%和1 8.06%。

According to calculation of obstacle degree, the obstacle factor of sustainable land use was analyzed in detail. The factors such as per capita agricultural gross output value, per unit area yield of grain, reed land rate, agricultural land rate and degree of townish are the main obstacle factor ofKey words: land use; sustainability; obstacle degree; The Yellow River Delta

研究结果表明：在34个因子中人均农业总产值、粮食单产、芦苇地占地率、农业用地率、城镇化水平是黄河三角洲可持续土地利用的主要障碍因素，其中芦苇地占地率在1996年以后始终是第一障碍因素，而人均农业总产值的限制主要出现在1998年之前，之后对可持续土地利用未构成障碍；粮食单产和农业用地率的影响主要出现在1996年以后；林草覆盖率、公顷耕地农机总动力和农村电气化水平在一半以上的年份对可持续土地利用构成障碍；在1994年之前，农民人均收入障碍度较大，是主要的障碍因素。

It was 7.25% in saline algae zone, 31.25% in Scirpus marqueter/Scirpus triqueter zone and 47.06% in reed zone;(3) The avian density undergoes declination with the development of wetland vegetation succession.

对全年不同演替阶段鸟类群落进行相似性比较，芦苇带与海三棱藨草带／藨草带的相似性系数S_1=0.5442，海三棱藨草带／藨草带与盐渍藻类带S_3=0.6182，芦苇带与盐渍藻类带S_2=0.2585。

The plumules of Phragmites australis growing in the constructed wetland test pool with high-concentration livestock wastewater and clean water were collected,and the total DNA was extracted for RAPD analysis to explore the genetic variation of Phragmites australis under contamination stress of high-concentration livestock wastewater.

为了探讨芦苇在高浓度畜禽废水污染胁迫下遗传特性的变化，将人工湿地试验池中生长的，受高浓度畜禽废水长期污染胁迫的和未受到污染的供试芦苇材料各20个单株幼芽分别混合提取DNA，采用RAPD分子标记技术在160个随机引物中进行筛选，找到3个能够扩增出差异且重复性较好的RAPD引物：S74、S516和S14。

Through boring and gathering water in natural reed wetland, the concentration of three kinds of nitrogen (nitrate-N, nitrite-N and ammonia-N) and the quantities of denitrifying bacteria in the soil of different depths were sampled and analyzed in the bloom period of reeds.

在芦苇生长旺盛阶段（3-5月），在芦苇湿地钻孔，聚水，取样分析了水中三氮含量及水孔不同深度土壤中反硝化细菌的数量。

Urban wastewater was treated by the reed gravel bed constructed in fishpond , but the effluent could be reached the criteria of water quality for hygienic fish culture when pumped bottom water treated with reed gravel bed.

通过直接建造在鱼塘内的芦苇碎石床处理城市污水后，再抽鱼塘底层水回流到芦苇碎石床上进行再处理的试验研究表明，这种处理可使鱼塘水质达到卫生养鱼的水质标准。

Model comparisons for estimating water and heat fluxes of reed wetland ecosystem in Panjin were done among Profile gradient method,Bowen ratio energy balance method and Eddy covariance method,based on the data from July 1 to July 31,2005 by open-path eddy covariance system(Li-7500,Li-cor Inc,USA) and the micro-climate gradient observation system.

利用2005年7月盘锦芦苇湿地生长旺季的小气候梯度系统30 min观测资料和开放式涡动相关系统10Hz原始观测资料，比较并分析了廓线法、波文比能量平衡法与涡动相关法计算的芦苇湿地生态系统水热通量。

Rumored ancient hill triangle for the East China Sea since the middle triangle山林间also unique to the water reed, Phragmites australis leaves Shell also mixed with the sea.

据传三角山远古时为东海，至今三角山林间还产着水乡特有的芦苇，芦苇丛中还夹杂着海螺壳。

The lilies have gone too, the yellow small-headed kind that in bud are like swimming snakes, and the great reeds are going, woven by wind and frost into untidy basket islands under which coot and moorhen skid for cover at the sound of strangers.

只有那种黄色的花冠很小的睡莲还含苞待放，它们摇曳时的身姿如水蛇游弋。风吹霜冻，芦苇也大片大片地枯黄了，如同一座座蓬乱的荒岛。一有人声，黑鸭和雷鸟便躲进芦苇丛中，不见了踪影。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。