Application of Coupling Technology of Water and Nitrogen in Cash Crop Cultivation

Amount of irrigation and fertilizer are two vital factors affecting crop growth．Under traditional irrigation and fertilization mode, utilization efficiency of farmland water and fertilizer is low, which is not conducive to sustainable development of agriculture, and appropriate irrigation and fertilization can significantly optimize crop growth．Water nitrogen coupling technology can achieve purpose of water saving, high quality and high yield by reasonably regulating water and fertilizer demand of crop in different growth periods．Development of water nitrogen coupling technology was introduced, research significance of water nitrogen coupling technology was expounded．Application effect and development prospect of water nitrogen coupling technology in cash crop cultivation was defined．Problems of water-nitrogen coupling technology were considered deeply．