Influence of sulfur on the growth and yield of rice genotypes.

摘要

Field trials were conducted in sulfur-deficient soils to study the response of rice genotypes to sulfur application. The treatments consisted of three levels of sulfur (0, 20 and 40 kg/ha) applied through gypsum and 10 rice genotypes (ADT 36, ADT 37, ADT 42, ADT 43, ADT 38, ADT 39, CO 43, CO 45, CO 47 AND ASD 19). The rice genotypes differed significantly among themselves in growth and yield on S addition. CO 43 (5090 kg/ha) and CO 47 (5243 kg/ha) recorded the highest grain yield, while the lowest grain yield was noticed with ADT 37 (3790 and 4053 kg/ha) on clay loam and sandy clay loam soils, respectively. The highest straw yield was observed with ADT 39 (6902 kg/ha) and ADT 43 (7150 kg/ha) and the lowest straw yield with ADT 37 (5848 and 6245 kg/ha) on clay loam and sandy clay loam soils, respectively. A similar response was observed in growth and yield characters. Growth and yield increased significantly with graded dose of sulfur and addition of 40 kg S/ha caused on an average 15% increase in rice yield over the control. Sulfur use efficiency was highest with 20 kg S/ha and differed among genotypes.