Drought Tolerance and Yield of Upland Rice Varieties Currently Grown in Thuan Chau district, Son La province

Date Received: 05-06-2025

Date Published: 13-06-2025

##submissions.doi##: https://doi.org/10.31817/tckhnnvn.2012.10.1.

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Issue: Vol. 10 No. 1 (2012)

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NÔNG HỌC

How to Cite:

Van, K., & Kim, T. (2025). Drought Tolerance and Yield of Upland Rice Varieties Currently Grown in Thuan Chau district, Son La province. Vietnam Journal of Agricultural Sciences, 10(1). https://doi.org/10.31817/tckhnnvn.2012.10.1.

Drought Tolerance and Yield of Upland Rice Varieties Currently Grown in Thuan Chau district, Son La province

Khoa Nguyen Van , Thanh Nguyen Thi Kim (*)

  • Tác giả liên hệ: [email protected]

    • Keywords

    Drought tolerance, upland rice

    Abstract


    Drought is the main constraint to rice production under rainfed condition. With the aim of selecting rice varieties suitable for rainfed cultivation, the present experiment was carried out to evaluate characteristics related to drought tolerance and yield of 19 upland rice varieties collected in Tay Bac in comparison with the control CH5 at Tay Bac University.  Drought tolerance of rice varieties was evaluated at the germination stage using KClO3 solution and under natural rainfed condition in Thuan Chau, Son La. The results showed that in the germination and seedling stage most of the upland varieties exhibit higher drought tolerance than the control in terms of  germination percentage in KClO3 solution (G2, G4, G6, G9, G10, G18) and seedling and root growth (G2, G8, G9, G10, G14).  Under rainfed condition, upland rice varieties showed moderate to high drought tolerance (1 to 3  in IRRI scoring system).  The grain yields of the upland varieties range  from 1.28 to 2.23 tons per hectare, a yield reduction by from 14.75 to 37.51 percent compared to irrigated condition. In contrast, the control showed yield decrease by 37.,06 percent. The following upland rice varieties, G2, G4, G9, G10, G18 were identified as having higher yield in rainfed condition at Thuan Chau, Son la.

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