Growth, yield and economics of rice (Oryza sativa) as influenced by level and time of silicon application

By Ashutosh Kumar Singh, Raghavendra P. Singh, Kalyani Singh. Indian Journal of Agronomy, 2001

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A field experiment was conducted during rainy (kharif) season of 1999 and 2000 at Research Farm, Depart- ment of Agronomy, Banaras Hindu Univeristy, Varansi, Uttar Pradesh, to study the effect of level and time of sili- con application on growth, yield and economics of rice (Oryza sativa L.). Different silicon levels led to significant increase in plant height, dry-matter production, panicles/m2, filled grainslpanicle, test weight and yield of rice. The maximum grain yield (6,588 kglha) was recorded with highest level of silicon, i.e. 180 kg Silha. However, the maximum response was observed at 127 kg Silha and thereafter decreased with increase in silicon level. High- est net returns and benefit : cost ratio were recorded when silicon was applied @ 120 kg Silha full as basal. The apparent silicon recovery and agronomic efficiency were higher at the lowest silicon level (60 kg Silha) and de- creased with increasing silicon levels. However, the highest nitrogen, phosphorus, potassium and silicon uptake was associated with 180 kg Silha. Among the application time,..full basal application of silicon at the time of trans- planting significantly increased the growth, yield attributes, yield and uptake of nutrients compared with the other time of silicon application.

Subfields: Agronomy and Crop Science, Plant Science

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