International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 5
First page : (1371) Last page : (1377)
Article doi: http://dx.doi.org/10.18782/2320-7051.5812
Effect of Drought Stress on Growth and Yield Attributes of Paddy
S. Behera*, R. K. Rout, A. Padhiary, P. K. Nanda, A. Nayak, D. Behera and T. Das
1,7 Krishi Vigyan Kendra, Kalahandi, Odisha
3Krishi Vigyan Kendra, Sambalpur, Odisha
4Krishi Vigyan Kendra, Keonjhar, Odisha
5Regional Research and technology transfer station,Bhawanipatna
2,6 College of Agriculture, Bhawanipatna, Kalhandi, Odisha
*Corresponding Author E-mail: srikrushnabehera.ouat@gmail.com
Received: 5.08.2017 | Revised: 27.08.2017 | Accepted: 1.09.2017
ABSTRACT
The present study was carried out in the Shed-net house of the Krishi Vigyan Kendra, Kalahandi during Rabi 2016-17.The objective of the present endeavour was to screen 6 number of rice varieties viz. Heera(V1), Sneha(V2 ), Kalinga-III(V3), Subhadra(V4), Rudra(V5) & Sankar (V6) (early group,75-85 days) for higher photosynthetic efficiency with higher productivity under simulated moisture stress conditions. The experiment was laid out in a factorial CRD with three stress treatments and three replications. The study revealed that moisture stress imposed at different growth stages reduced plant height, tiller number, leaf area, specific leaf weight in all the varieties. However, the variation among them has found to be statistically significant. It was found that the significant variation existed among the varieties under favourable conditions (non stress).Which might be due to relative difference in their genetic potential, when all these varieties were subjected to moisture stress condition the grain yield reduced significantly. However, the magnitude of reduction among the varieties was different. Varieties like V5, V3 and V1 suffered least; while the varieties like V4, V6 and V2 suffered most due to adverse stress condition. In general, there was about 42 % reduction in yield (per plant basis) and 17 % in harvest index when subjected to stress condition. Similarly, expression of yield loss on unit area basis (kg/ha) the same was found to be 19 % at flowering. The reduction in grain yield was due to stress attributed to reduction in panicle length, panicle weight and weight of the grain. Hence the above mentioned yield attributing character should primarily be taken as selection criteria for drought tolerance of rice cultivars.
Key words: Drought stress, effective tillers, panicle length, fertile grain and harvest index
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Behera, S., Rout, R.K., Padhiary, A., Nanda, P.K., Nayak, A., Behera, D., Das, T., Effect of Drought Stress on Growth and Yield Attributes of Paddy, Int. J. Pure App. Biosci.5(5): 1371-1377 (2017). doi: http://dx.doi.org/10.18782/2320-7051.5812
