Study on fertilization techniques for greenhouse vegetable in Shanghai suburbs

This project was implemented by the Soil and Fertilizer Institute, Shanghai Academy of Agricultural Science. Shanghai has a long history of strawberry cultivation. About 5,000 ha area in this region is currently under strawberry cultivation, and a great potential exists for the future expansion. In 2012, a field experiment was conducted in Dahong Village, Pudong to study the effects of N and K fertilization on yields and quality of strawberry in Shanghai. The trial had seven treatments of N-P₂O₅-K₂O (kg/ha) including: 0-150-300, 150-150-300, 300-150-300; 450-150-300, 300-150-0 (CK), 300-150-150, 300-150-450.

Results indicated that applications of 300 kg N, 150 kg P₂O₅ and 450 kg K₂O/ha constituted the optimal (OPT) fertilizer management strategy for strawberry. The OPT treatment produced a strawberry yield 37 t/ha, which was an increase of 81% over the no K (300-150-0) treatment yield of 21 t/ha. Similarly, the OPT treatment gave better profit of US$47,612 and better quality (contents of soluble solids, Vitamin C, sugar, and acid, as well as solid/acid ratio) strawberry over the CK treatment. Shanghai-09