Studies on Different Planting Pattern (Using Rolling Marker) in System of Rice Intensification (SRI) through Hybrid Rice CORH 3

Abstract

The System of Rice Intensification (SRI) is a new technique for rice culture. The main features of this system are: transplanting of young seedlings singly in a square pattern with wide spacing, using organic fertilizers and hand weeding, and keeping the paddy soil moist during the vegetative growth phase. Significant phenotypic changes occur in plant structure and function and in yield and yield components under SRI cultivation. The production increases can be notable. However, there are some constraints to adoption of the presently recommended set of practices, e.g., a small number of plants may not be suitable for the low solar radiation condition. In SRI cultivation, adopting proper spacing during transplanting is one of the essential principles underlying the technology.  However, practical adaptability of uniform spacing becomes very tedious under field conditions and farmers find it difficult to mark the recommended spacing.  With this objective, the field experiment was conducted transplanting single seedling in different patterns in main field (using rolling markers) under SRI cultivation method.  The experiment was laid out in a factorial randomized block design (FRBD) replicated thrice.  The following modifications were tested, in the triangular method, the seedlings are planted in a zig zag pattern with 25cm spacing between each seedling and also rows, next oblong method of planting the seedlings are planted in a oblong pattern with 25cm spacing between each seedling and 30 cm between the rows. Significant phenotypical changes occur not only in plant structure and function but also in yield and yield components under SRI cultivation. The zig zag and oblong methods of planting can be perfectly and economically taken up only by utilizing specially designed rolling markers, that had significant in increasing the number of productive tillers, minimize time and cost of transplanting in SRI. With these modifications, grain yield exceeded 10.5 t ha^-1, 31 % greater than in square pattern of planting. zig zag pattern of planting adopted by using triangular rolling markers was found to be the best option for getting higher productivity in hybrid rice under System of Rice Intensification technique.