Effect of N--fertilizer on main quality characters of rice and RVA profile parameters

Abstract

The experiment in pot was carried out with Shanyou 63( indica type hybrid rice) and Wuyujing 3( japanica ). Effects of N-fertilizer application after transplantation on the main quality characters and RVA profile parameters of rice were studied. The results were as follow: effects of N-fertilizer on head milled rice and protein content were improved with the application increase; effect of N-fertilizer on chalkniss varied in different cultivars; gel consistency became softer with the amount increasing of N-fertilizer; alkali spreading value and amylose content were insensitive to the fertilizer. Effects of N-fertilizer on RVA profile parameters varied significantly in two cultivars. There was a conic relationship between peak viscosity and amount of N-fertilizer. Comparing with Wuyujing 3, Shanyou 63 needed less N-fertilizer to reach the tiptop of the peak viscosity. Furthermore, effect of N-fertilizer on breakdown in Shanyou 63 was more obvious than that in Wuyujing 3.