[Effects of rice-duck farming on paddy field water environment].
Field experiment was conducted to investigate the effects of rice-duck farming on the water environment in paddy field. The results showed that under rice-duck farming, the temperature and pH value of the surface water in paddy field decreased, and the electrical conductivity, oxidation-reduction potential, turbidity, and the contents of nitrogen (N), phosphorus (P) and potassium (K) increased. The total N, P, and K increased by 1.85-5.06 times, 2.01-8.70 times, and 42.79%-109.18%, respectively, as compared to those in conventional rice farming. All of these illustrated that rice-duck farming improved the paddy field water environment and nutrient supply, optimized the ecological environment of paddy field, and promoted the growth and development of rice.
Quan
Guo-Ming
GM
Institute of Tropical and Subtropical Ecology, South China Agricultural University, Guangzhou 510642, China. gzbyqgm@126.com
Zhang
Jia-En
JE
Chen
Rui
R
Xu
Rong-Bao
RB
D000383:Agriculture / Q000379:methods*; D000818:Animals; D004372:Ducks / Q000254:growth & development*; D017753:Ecosystem; D009584:Nitrogen / Q000032:analysis; D012275:Oryza / Q000254:growth & development*; D010758:Phosphorus / Q000032:analysis; D011188:Potassium / Q000032:analysis; D014867:Water / Q000032:analysis*
D014867:Water; D010758:Phosphorus; D009584:Nitrogen; D011188:Potassium