Abstract:

Abstract: This article studied the effects of topdress of potash fertilizer on growth and nutritious quality of onion by the small area comparison test. The results indicated that topdress of potash fertilizer could promote the growth, increase stem diameter, plant height and fresh weight of leaves, roots, stems and bulbs of onion. At the same times, topdress of potash fertilizer could improve the contents of soluble solid, sugar, protein and vitamin C, improve the nutrient quality of onion. The results of analysis of variance show that the amount of topdress of potash fertilizer 350 and 400 kg/hm2 in raising the onion yield and improving nutritious quality has had no differences. Therefore, the amount of 350 kg/hm2 is the best use of topdress potash fertilizer.