Water and Fertilizer Coupling Technology and Its Application in Watermelon Cultivation

Water and fertilizer coupling can effectively exert synergistic effect of water and fertilizer, and supply crops for absorption, assimilation and utilization through the best ratio of water and nutrients, so as to achieve purpose of saving water and fertilizer, adjusting quality and increasing production．Water and fertilizer coupling were summarized from development process, definition and effect classification．Then research progress of watermelon growth and development, physiological characteristics, yield and quality in response to the technology were separately described, indicating that coupling of water and fertilizer was an effective way to produce watermelon with high efficiency and high quality．Therefore, through in-depth research and exploration of water and fertilizer coupling mechanism of watermelon to reveal optimal management mode of water and nutrient in farmland system, which could provide a theoretical basis for guiding comprehensive regulation of water and fertilizer, as well as water-saving, fertilizer-saving, high-quality and high-yielding cultivation of watermelon．