Accumulation and distribution characteristics of biomass and nutrient in bitter gourd（Momordica charantia L.）

Elemental uptake and allocation patterns of crops create insight for nutrient management. On-field experiment was conducted to understand the accumulation and distribution characteristics of biomass and nutrient in bitter gourd. The results revealed that 4.0% of dry matter was accumulated in leaves before harvest and 96% of it was accumulated in leaves and fruits from harvest stage to the end. The total absorption of nutrient in bitter gourd was K>N>P.Different organs at various growth stages showed different accumulation trend. Generally ，the ratio of 1.0∶0.1∶1.4 from seedling stage to early harvest stage，and 1.0∶0.2∶1.6 from harvest peak to the end was optimal for bitter gourd.Throughout growth season， to obtain a ton of bitter gourd，the NPK requirement was 4.63 kg，0.72 kg and 6.87 kg，respectively.