Studies on bio-production and water cleaning by floating culture plants

19941.从筏体材料、筏体大小、种植方式、施肥种类和用量等方面考察和建立了漂浮栽培系统的标准基础技术。在试验的30种植物中，确定了最适合漂浮培养的植物是美人蕉（Canna indica l .）和互花香蒲（Cyperus alternifolis l .）。与其他植物相比，这两种植物的生物量都非常高。植物从池水中吸收氮的重量高于从肥料中补充氮的重量。漂浮栽培的水塘水体NO3-N、NH4-N、总磷和COD浓度均低于未种植的水塘（对照）。1995 .对漂浮栽培的美人蕉和香柏与土壤栽培植物的生物量产量和水质净化进行了比较研究。并对两种培养下美人蕉的生长分析和光合作用进行了比较。此外，还比较了几种植物的根系形态特征。浮养美人蕉和沙草的生物量显著高于土养。这些值在美人蕉和赛普勒斯的漂浮培养中分别为4倍和5倍。特别是美人蕉对磷和钾的吸收能力较强。因此，他们的工厂将成为这两种元素的消除者。美人蕉漂浮栽培的高生物量产量依赖于大叶面积产量和净同化率。高NAR是由于植物的高光合速率（Pn）。另外，叶片和叶肉的高导电性是叶片和叶肉的高导电性的主要原因，叶肉细胞的叶片和叶肉的导电性代表了叶肉细胞叶绿体对co2的固定效率。从漂浮栽培和土壤栽培的植物根系横截面的显微照片看。与土壤栽培植物相比，漂浮栽培植物根系中溶解性气孔的形成更多。但其形成存在种间差异。溶解性气孔的形成与根的比重有高度的相关性。少

19941.Standard basic technology of floating culture system was examined and established from the view point of raft material, raft size, planting method, kind and amount of fertilizer.2.It was made clear that the most suitable plant for floating culture was Canna indica L.and Cyperus alternifolis L.among 30 spesies tested. The both plants produced remarkably high biomass as compared to other plants. The weight of nitrogen absorbed by plant from the water in pool was higher than that of supploed from fertilizer.NO3-N,NH4-N,total P and COD concentration of the water in pool on whererice and wheet plants were grown with floating culture were lower than those of the non-planted pool (control).1995Biomass production and water cleaning of Canna and Cyperus grown with floating culture were examined in comparison with soil culture plants. Growth analysis and photosynthesis of Canna were also compared with both culture. Ferther, the morphological feature of root in several plants grown with bot … More h culture was compared.1.Biomass production of floating cultured both plants, Canna and Cyperus were remarkably higher than that of soil cultured them. These values in floating culture were 4 times and 5 times in Canna and Cyperus, respectly. Especially, Canna absorbed actively phosphorus and pottassium. Therefore, theis plant will become eliminator of both elements.2.High biomass production in floating culture of Canna depended on large leaf area production and net assimilation rate (NAR). HIgh NAR was due to high photosynthetic rate (Pn) of the plant. Further high Pn caused by high ability of leaf conductance and mesophhyll conductance which representas CO_2 fixzation effeciency in chloroplast of mesophyll cell.3.From the microphotograph of the cross section of root some plant species grown with floating and soil culture. More formation of lysigenous aerenchyma was cobserved in roots of floating cultureplants compared to soil culture plants. However, there was species difference of the formation. There was high correlation between formation of lysigenous aerenchyma and specific weight of root. Less