3.Crushed straw,vinasse,rotted cattle manure,fresh weed,red duckweed,garbage of edible fungi,wood meal,high quality compost and dung water were applied in the seed bed;
4.The results showed that During the experiment, add lower concentrations of mixed rare earth (0.10mg/L,0.20mg/L,0.40mg/L) to promote growth and experimentation red duckweed nutrient over-enrichment of water bodies However, with further concentration rise (0.80mg/L), Duihong duckweed growth of nutrient over-enrichment of water bodies and experiments have struck.
5.Its order of rank is: the rice field duck-fish-duckweed cultivation (2.00) > rice (1.97) > rice-duck (1.88) > eel cultivation (1.82) > duck-eel cultivation (1.74). 4. In the social efficiency aspect, it is advantageous to the industrial structure adjustment.
6.Planting flowers invites the butterflies, and in the same way rocks invite clouds, the pine invites winds, a water pond invites duckweed, a terrace may be said to invite the moon, bananas invite the rain, and willows invite cicadas.
7.Abstract: This paper presents a new-type floating breakwater with the structure of “duckweed”.Some circular wooden blocks were flexibly tied together and flat located on water surface.A series of experimental investigation were carried out.The experimental results show that 1) there are wave attenuation characteristics of the new-type floating breakwater;2) by comparing the two installation styles,the wave attenuation effectiveness anchored on the sea bed is better than that of anchored on the sea shore.
8.Have a rest and locate in brightness of flowers and birdsongs, sample the mystery of " bodhi of a flower and one world , a leaf one " silently; Look at the murmuring flowing water, try to figure out the secret that " a leaf duckweed belongs to the sea , where not to meet in life " quietly .
9.The different concentrations of Ce were added to a static system of experimental water separately,and the contents of N,P,DO,COD and alga chlorophyll level in the water body were determined regularly. The influence of Ce on the growth of red duckweed in eutrophic water was investigated in this paper.
