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Role of Seed Treatment with Herbal Plant Products and Management Practices with Growth Nutrients by Decreasing Chlorophyll Reduction Rate for Overcoming Submergence Stress in Rice (Oryza Sativa L.)

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Author Affiliations

  • 1Department of Genetics and Plant Breeding, Institute of Agricultural Science, Calcutta University, 41/2 Hazra Road, Kolkata, 700019; INDIA

Int. Res. J. Biological Sci., Volume 4, Issue (5), Pages 38-43, May,10 (2015)

Abstract

The fresh harvested dried seeds with optimum moisture content of two paddy genotypes viz. Mahananda and Swarna were treated with sun drying powdered form of nineteen herbal treatments at the rate of 2 gm of treatment/kg of seeds along with control and stored for 3 months at -20c. The herbal treated seeds were raised to establish as 21 days old seedlings in a pot with soil which were submerged for ten days in the drum in three replications. The same set of herbal treated seeds were sown at low land field condition at Baruipur, South 24 Parganas, West Bengal, India to see the effect of laboratory experiment for two consecutive years 2012 and 2013 in the kharif season and various agro morphological characters are estimated. Under severe submergence stress out of 20 treatments (19 herbals and one control) four treatment like tobacco, kalmegh, neem and vitex leaf have significantly reduce the reduction% of chlorophyll in both the varieties. The chlorophyll reduction% is negatively correlated with survival percentage. The field experiment result reveals that tobacco, kalmegh, neem and vitex leaf treated seeds of the two paddy genotypes have outstanding seed yield. In a separate set up 21 days old rice seedlings of above rice genotypes were treated with growth nutrients viz. nitrogen(N), phosphorous(P), potassium(K) and NPK separately along with control in the soil filled pot prior to two days of submergence for complete ten days in three replications in the drum. Total chlorophyll estimation was done before and after submergence in both lab experiments. Survival % was done after submergence. The total chlorophyll reduction% was higher in case of nitrogen and NPK treatment in both the varieties. Nitrogen has the ill effects over the survival% under submergence condition. Better phosphorous soil status before submergence will enhance the survival% even in the susceptible variety Swarna. Proper and suitable management practices are very crucial for overcoming submergence stress in rice.

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