Analytical Studies on the Crop Adaptability. : II.Stabilities of Rice Varieties for the Change of Temperature and N-fertilizer

Abstract

Stabilities of three rice varieties were tested under the 10 different environments, consisted of 5 Ievels of temperature and 2 Ievels of N-fertilizer. Those varieties tested have shown different degrees of adaptability in the International Rice Adaptation Experiments, of IBP and the subsequent studies. The order of varieties on the degree of yield stability, estimated by the values of the, variance ratio among total environments, were paralleled with that of general adaptability evaluated by some methods in case A of the IRAE. The order of varieties on specific stability for N-fertilizer also agreed with that of general adaptability. However, the order on specific stability for ternperature were different.