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作 者 ：章文龙¹;曾从盛^1,2,3,4;张林海^1,2;王维奇^1,2;林燕¹;艾金泉¹

期 刊 ：应用生态学报 2009年 20卷 06期 页码：1317-1322

摘 要 ：以闽江河口湿地土著种芦苇与入侵种互花米草为研究对象,测定了二者地上生物量和氮、磷吸收效率.结果表明：芦苇和互花米草地上生物量的季节变化呈典型的单峰值曲线,芦苇夏季地上生物量最大,达到2195.33 g·m^-2,互花米草则秋季最大,达到3670.02 g·m^-2;不同季节芦苇和互花米草氮、磷吸收效率均呈单峰值曲线,芦苇氮、磷吸收效率分别在夏季和秋季达到最高(21.06 和1.12 g·m^-2),互花米草均在秋季达到峰值(26.76和3.23 g·m^-2);芦苇和互花米草的氮吸收效率极显著大于磷(P<0.01),且互花米草的氮、磷吸收效率显著大于芦苇(P<0.05);植物N/P、C/N和C/P对植物氮、磷吸收效率有一定指示意义.

Abstract:Taking the native Phragmites australis and invasive Spartina alterniflora in Minjiang River estuary as test objectives, this paper studied the seasonal dynamics of their biomass and nitrogen- and phosphorus absorption efficiency. A typical single-peak curve was presented for the seasonal dynamics of aboveground biomass and nitrogen- and phosphorus absorption efficiency of the two species. P. australis had the maximum aboveground biomass (219533 g·m-2) in summer, while S. alterniflora had it (367002 g·m-2) in autumn. The total nitrogen (TN) and total phosphorus (TP) contents of P australis reached the peak (2106 g·m-2 of TN and 112 g·m-2 of TP) in summer and in autumn, respectively, while those of S. alterniflora all reached the peak (2676 g·m-2 of TN and 323 g·m-2 of TP) in autumn. Both of the two species had a higher absorption efficiency in TN than in TP (P<001), and S. alterniflora had a significantly higher absorption efficiency of TN and TP than P. australis (P<0.05). To some extent, the N/P, C/N, and C/P ratios of plants could indicate the nitrogen- and phosphorus absorption efficiency of the plants.

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