Comparison of Irrigation Regimes and Seedling Age Effects on Yield and Yield Components of Rice (Oryza sativa L. var. Tarom Hashemi)

Document Type : Research Paper

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Abstract

In order to investigate the effect of irrigation regimes and seedling age on rice yield and its components, present research was conducted as a split plot experiment based on randomized complete block design with three replications in Mazandaran province, Mahmoud Abad in 2017. The main factor included the irrigation method in three levels (flooding, saturation and low-irrigation) and the sub factor of seedling age at three levels (three, four and five weeks). The results showed that the effect of irrigation management only on the number of tillers and the effect of plant age on the number of tillers, panicle weight, straw yield and grain yield and harvest index were significant. Comparison of the average effect of irrigation treatments presented that the number of tillers in the flood treatment was the highest and in the low-irrigation (ecological) method the lowest was. Comparison of mean of simple planting effect of plant age displayed that the number of fertile tillers in the conventional treatment (4 weeks) was the highest and in ecological treatment (3 weeks) was the lowest. Regression analysis of panicle weight in different treatments at plant age level indicated a decrease in panicle weight. Therefore, 99.5% of the weight loss was due to the age of the plant. Similarly, the relationship between planting age and rice yield showed a decrease in plant yield with increase of plant age. So, based on the explanatory coefficient, about 97.5% of grain yield decreased due to age.  Considering the no significant difference in grain yield at irrigation factor levels, and lack of ecological methods benefits in flooding (conventional), ecological treatments (low-irrigation level and 3th week) are recommended. The flexibility of the proposed techniques in the ecological method suggests that there are opportunities that will provide the ground for moving towards agricultural sustainability.
 
 

Keywords

References

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JOURNAL OF AGRICULTURAL SCIENCE AND SUSTAINABLE PRODUCTION
Volume 29, Issue 2
July 2019
Pages 67-78

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