关键词: 环境互作, 环境互作

Abstract: This research was aimed to study the effects of different treatments of fertilizer on yield, quality, nutrition absorption in plateau summer broccoli, for develop a reasonable fertilization scheme and provide a theoretical basis for high quality and efficiency production of plateau summer broccoli of Hexi area of Gansu Province. The field experiments showed that the key factor affecting yield was nitrogen, the yield, tight degree and chlorophyll content of high nitrogen treatment was more than low nitrogen treatment’s. The nitrate content was improved while soluble sugar content was declined because of the high nitrogen treatment, the higher ratio of nitrogen and phosphorus and the shortage of potassium. The Vc content of curd was dropped for too high or too low fertilizer amount. Broccoli absorbed potassium most, followed by nitrogen, and phosphorus at least. Correlation analysis revealed that the yield and chlorophyll content of curd were significantly correlated with N, K content in plant, the soluble sugar and Vc content of curd were significantly correlated with P in plant, which indicated adequate nitrogen, phosphorus and potassium nutrition were important to the improvement of yield and quality in broccoli. Reasonable matching of nitrogen, phosphorus and potassium can control the absorption and distribution of broccoli’s main mineral nutrient, facilitate the accumulation of nutrition about leaves and curd, and improve yield and quality of curd.