Effects of spraying aquatic extraction substance from residue of P. baumii on Brassica rapa L.

A pot culture experiment was carried out to study effects of spraying aquatic extraction substance from residue (AESR) of P. baumii on Brassica rapa L. The results showed that the spraying of the AESR with low concentration could promote the growth, increased plant biomass and quality, and enhance photosynthesis of Brassica rapa L. Compared to the controls, the plant biomass increased by 7.8%. But spraying with high concentration decreased the plant growth. When the AESR mixed with leaf fertilizer at low concentration, the effects was the best and increased the plant biomass by 26.3% compared to control.