冬茬和冬春茬棚(室)番茄,常常由于遭受低温和寒流侵袭，造成番茄生理冻伤，轻者推迟生育期，影响番茄产量，严重时会造成毁苗重种。番茄苗受冷、冻害后的症状是：子叶缘失绿叶片向上卷曲，冻伤部位逐渐变黄，有时整个叶片萎蔫后枯死。定植后的番茄受冻后，不发新根，老根... Winter stubble and winter and spring stubble shed (room) tomato, often suffer from low temperature and cold current invasion, resulting in physiological frostbite tomato, light delay the growth period, affecting tomato yield, severe destruction of seed will cause heavy. Tomato seedling is cold, the symptoms after frost damage are: the leaf margin chlorosis leaf curls upward, the frostbite part gradually turns yellow, and sometimes the entire leaf wilted and died. After planting the tomato is frozen, no new roots, roots ...