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1苗期生理性病害1.1徒长苗症状:表现为节间伸长,叶柄和叶身变长,叶色淡绿,叶片较薄,组织柔嫩。防治措施:合理调节光、温、湿。避免温度过高,苗床温度采取分段管理,降低夜温,加大昼夜温差;适时通风、
1 seedling physiological disease 1.1 legume seedling symptoms: the performance of internode elongation, petiole and leaf body longer, leaf color light green, thin leaves, tissue tender. Control measures: reasonable regulation of light, temperature and humidity. Avoid over-temperature, seedbed temperature to take sub-management, reduce night temperature, increase temperature difference between day and night; timely ventilation,