稻鸭共作对稻田水体环境的影响

通过田间对比试验，研究了稻鸭共作技术对稻田水体环境性质的影响.结果表明：稻鸭共作能够降低稻田表层水体的温度与pH值，提高电导率、氧化还原电位、混浊度和总氮、总磷、总钾三大营养元素的含量，其中总氮、总磷、总钾的含量分别比常规稻作增加1.85～5.06倍、2.01～8.70倍和42.79%～109.18%.说明稻鸭共作对改善水体理化性质、提高有效肥力供应，进而优化稻田生态环境和促进水稻的生长发育均具有积极作用.

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.