Physiological Response of Vallisneria natans to Nitrogen and Phosphorus Contents in Eutrophic Waterbody
苦草对富营养化水体中氮磷营养盐的生理响应

The response of Vallisneria natans to the increase contents of nitrogen and phosphorus were studied under laboratory conditions by measuring chlorophyll fluorescence parameters of V.natans using a pulse-amplitude modulated fluorometer(Diving-PAM),combined with measuring some other physiological indexes of V.natans.The results showed that V.natans responded quickly to water nitrogen and phosphorus concentration changes,the maximum quantum yield decreased significantly after 2 h and 6 h,the maximum quanta yie...