Impact of integrated crop management practices (ICM) on input use efficiencies of rice in different rice soils of Tamil Nadu.

摘要

A field experiment was conducted during the kharif season of 2006 to study the impact of integrated crop management practices (ICM) on input use efficiencies of rice at Aduthurai, Kattuthottam and Bhavanisagar rice soils of Tamil Nadu, India. The study involved two genotypes, two establishment methods, three manuring practices and two weeding practices. The leaf colour chart (LCC)-based nitrogen (N) management positively enhanced the partial factor productivity (PFP) for N uptake at Aduthurai and Kattuthottam and the mechanical weeding positively influenced the nitrogen uptake at Bhavanisagar. The combined adoptions of the ICM components registered higher partial factor productivity for grain yield at Aduthurai and Bhavanisagar over the individual practices. The planting of younger seedlings by conventional irrigation practice increased the water productivity at Aduthurai. The inclusion of mechanical weeding resulted in higher labour productivity index at all the three centres.