Abstract: To understand the status of macrobenthos in intertidal zone of Jiangsu Province, nine sections of intertidal zone in Jiangsu were deployed for macrobenthos sampling in May, August, October, 2014 and March, 2015. In total, 78 species of macrobenthos were identified, including 39 species of Annelida, 23 species of Mollusca, 12 species of Crustacea and four species of other animals. The mean density was 78.64 ind·m^-2, and annual mean biomass (ash-free) was 13.01 g·m^-2. The mean secondary productivity of macrobenthos was 8.57 g·m^-2·a^-1 and P/B ratio was 0.66. Compared with the survey in the 1980s and of the “908” special project, the main groups of macrobenthos in intertidal zone of Jiangsu did not change, but species richness decreased. The difference in secondary productivity between the middle tidal zone, the high and low tide zones was significant (P<0.05) but there was no significant difference among seasons (P>0.05).

Key words: yield, drip irrigation frequency, irrigation amount, water use efficiency, potato, quality