关键词: 青花菜, 施肥, 养分吸收分配, 产量, 品质

Abstract: Field experiment was conducted to study the effects of nitrogen, phosphorus, potassium deficiency and boron on N、P、K nutrition absorption and distribution, yield, quality and of broccoli. The results showed that the plant accumulate more mineral nutrition during initial period of bud to curd intumescences period. In the whole growth stage, broccoli absorbed K highest, and then N, P was least. N, P, K was distributed in leaves mostly, and then turn to curd. The content of NPK decreased 19.6%, 10% and 9.0% in leaves from bud period to harvest and the content of NPK in curd increased to 23.1%, 15.9% and 11.1% respectively in harvest period. The nitrogen, phosphorus and potassium deficiency decreased yield, vitamin C and finished product rate significantly. The treatment of adding boron increased finished product rate 4.8% than NKP treatment. The treatment of deficiency of nitrogen and sulfur decreased the glucosinolates significantly. Correlation analysis revealed that the yield was significant correlate with N, K accumulation in plant and finished product rate was significant correlate with the P in plant.

Key words: broccoli, fertilization, nutrient absorption and distribution, yield, quality