大棚蔬菜气害的防治一、氨气和亚硝酸气体的防治。要控制氨气和亚硝酸气害，最主要的是控制氮气的生成，要合理施肥。大棚内氮肥的合理使用应以底肥为主，追肥为辅。追肥应少用挥发性较强的化肥，同时要少施、勤施，施后盖土。如果发现大棚内氨气含量过高，可在大棚内撤些... Greenhouse vegetable gas prevention and control of a, ammonia and nitrous acid gas prevention and control. To control ammonia and nitrous acid gas, the most important is to control the formation of nitrogen, to a reasonable fertilization. The rational use of nitrogen fertilizer in the greenhouse should be based at the base, top dressing supplemented. Top dressing should be less volatile volatile fertilizers, at the same time to less facilities, ground facilities, facilities cover the soil. If you find the greenhouse ammonia content is too high, you can withdraw in the greenhouse ...