Nutrient harvest index and soil available nutrients of rice (Oryza sativa) as influenced by System of Rice Intensification (SRI) practices

Dr. V.Sridevi; Dr. V.Chellamuthu

Volume : IV, Issue : VI, June - 2015

Nutrient harvest index and soil available nutrients of rice (Oryza sativa) as influenced by System of Rice Intensification (SRI) practices

Dr. V. Sridevi, Dr. V. Chellamuthu

Abstract :

A field study was conducted in sandy loam soil during kharif to evaluate the different SRI practices in lowland rice ecosystem. The treatments viz., YOSC, NOSC, YMSC, YOSH, NMSC, NOSH, YMSH, YORH, NMSH, YMRH, NORH and NMRH were replicated thrice in a Randomised Block Design in which Y refers to young seedlings of 14 days old; N refers to normal seedlings of 21 days old; O refers to one seedling hill–1; M refers to multiple seedlings (3 seedlings hill–1); S refers to square planting (22.5 cm x 22.5 cm); R refers to rectangular planting (12.5 cm x 10.0 cm); C refers to conoweeding and H refers to hand weeding. The results revealed that the combination of Young seedling, One seedling, Square planting and Conoweeding (YOSC) recorded higher nutrient uptake, nitrogen harvest index, soil available nitrogen, yield and grain harvest index.