Performance of BRRI Dhan 32 in SRI and Conventional Methods and Their Technology Mixes

Abstract

An experiment was conducted in Bangladesh, during July-December 2001 to study the performance of rice cv. BRRI Dhan 32 grown under a system of rice intensification (SRI) and conventional planting techniques using organic and inorganic fertilizer application with different root placement methods. The treatments comprised: 2 planting methods, i.e. SRI and conventional planting; 2 types of root placement, i.e. J- and L-shape root placement; and 3 fertilizer sources, i.e. chemical fertilizer (N:P:K:S:Zn at 60:40:40:10:5 kg/ha), organic fertilizers (10 t cow dung/ha), and 50% chemical + 50% organic fertilizers. Data were recorded for plant height, total number of tillers per hill, number of effective tillers per hill, number of non-effective tillers per hill, panicle length, number of grains per panicle, number of sterile spikelets per panicle, 1000-grain weight, grain yield, straw yield, biological yield, and harvest index. The highest grain and straw yields were recorded in SRI planting method (5.6 and 5.98 t/ha, respectively) and with 50% chemical + 50% organic fertilizer treatments (5.04 and 5.67 t/ha, respectively). The L-shape root placement showed the highest grain yield (4.97 t/ha).