水溶性硅肥对马铃薯生长及产量的影响OA

Experiments with different silicon application rates(drip application and foliar application)were conducted using variety'Xindaping'elite(for qualified I production)and tissue culture plantlets(for pre-elite production)as experi-mental materials in order to investigate the effects of water-soluble silicon fertilizer on potato growth and yield.The effects of silicon fertilizer on potato agronomic characteristics,tuber setting characteristics,marketable tuber percentage/effective tuber rate and yield were analyzed.In qualified I seed potato production,drip application of 6.0 kg/ha silicon fertilizer had the best performance.Plant height and leaf SPAD value were increased by 14.50%and 9.13%compared with the control(CK),respectively.The converted yield was 58 011 kg/ha,with a yield increase of 11.64%,and the marketable tuber rate reached 90.76%.In pre-elite seed potato production,foliar application of 30 kg/ha silicon fertilizer significantly increased stem diameter by 15.23%and leaf SPAD value by 8.47%.The number of effective tubers per plant was 3.26,which was 35.83%higher than CK.The yield was 445.58 tubers/m²,with a yield increase of 29.36%,and the effective tuber rate reached 81.42%.Therefore,rational application of water-soluble silicon fertilizer can improve plant growth,photosynthetic characteristics and tuber setting traits,and significantly increase seed tuber yield and quality rate.Drip application at 6.0 kg/ha and foliar application at 30 kg/ha are recommended as the optimal dosages for local variety'Xindaping'qualified I and pre-elite seed potato production,respectively.