Abstract:

Two years studies on the limitation factors of rice yield and quality were conducted during 2006-2007 by the method of field multi-sited experiments in two cold region of northeast China under seven treatments(OPT, OPT-N,OPT-P,OPT-K,OPT-B,OPT-Zn,CK0). Results indicated that the nutrient of nitrogen was the most important limitation factors of rice yield and quality, next was the nutrient of potassium.for quality,two kinds nutrient affected taste quality and the ratio of brown rice,milled rice,head milled rice. But Components of rice yield were reduced under nitrogen deficiency.