ROOTS VERSUS SHOOTS IN NUTRIENT-UPTAKE BY AQUATIC MACROPHYTES IN FLOWING WATERS
ROOTS VERSUS SHOOTS IN NUTRIENT-UPTAKE BY AQUATIC MACROPHYTES IN FLOWING WATERS
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DOI：
10.1139/f89-058
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发表时间：
1989-03-01
影响因子：
2.4
通讯作者：
HAMILTON, HR
中科院分区：
文献类型：
--
作者：
CHAMBERS, PA;PREPAS, EE;HAMILTON, HR
在加拿大萨斯喀彻温省南萨斯喀彻温河进行的移植实验表明，水生大型植物--卷叶水生植物--通过根部获得了大部分营养物质。当植物生长在含有高(602MU·g·cntdo.G-1总磷，712微克碳点数。G-1总有机氮)或低(258µg/cntdo.G-1总磷；109微克碳点数。G-1总有机氮)营养沉积物和暴露在高(75微克cntdo.L-1可溶性活性磷(SRP)；530ug.L-1总溶解氮(TdN)或低(10ug/cntdo.开阔水域的营养盐浓度、生物量、地上部密度和组织营养物质浓度在很大程度上取决于沉积物类型，而不是开阔水域的化学成分。这些结果表明，在流动水域中，根部是水生植物吸收养分的重要场所。
Transplant experiments conducted in the South Saskatchewan River, Saskatchewan, Canada showed that the aquatic macrophyte, Potamogeton crispus, obtained most of its nutrients through the roots. When plants were grown in buckets containing high (602 .MU.g .cntdot. g-1 total phosphorus, 712 .mu.g .cntdot. g-1 total organic nitrogen) or low (258 .mu.g .cntdot. g-1 total phosphorus; 109 .mu.g .cntdot. g-1 total organic nitrogen) nutriet sediments and exposed to high (75 .MU.g .cntdot. L-1 soluble reactive phosphorus (SRP); 530 .mu.g .cntdot. L-1 total dissolved nitrogen (TDN), or low (10 .mu.g .cntdot. L-1 SRP; 323 .mu.g < L-1 TDN) nutrient concentrations in the open water, biomass, shoot density and tissue nutrient concentrations were largely determined by sediment type, rather than open water chemistry. These results indicate that the roots are an important site of nutrient uptake for aquatic macrophytes in flowing waters.