THE EFFECTS OF A POTENTIAL RETARDANT ON THE STEM’S HARDNESS, GROWTH AND YIELD OF IR50404 RICE

Received: 11-06-2016

Accepted: 18-08-2016

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Issue: Vol. 14 No. 10 (2016)

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KỸ THUẬT VÀ CÔNG NGHỆ

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Thuc, L., Duy, M., ThanhHoi, N., & ThiNhung, M. (2024). THE EFFECTS OF A POTENTIAL RETARDANT ON THE STEM’S HARDNESS, GROWTH AND YIELD OF IR50404 RICE. Vietnam Journal of Agricultural Sciences, 14(10), 1557–1563. http://testtapchi.vnua.edu.vn/index.php/vjasvn/article/view/1469

THE EFFECTS OF A POTENTIAL RETARDANT ON THE STEM’S HARDNESS, GROWTH AND YIELD OF IR50404 RICE

Le Vinh Thuc (*) 1, 2, 3 , Mai Vu Duy 2 , Nguyen ThanhHoi 2 , Mai ThiNhung 2

  • 1 Khoa Nông nghiệp và Sinh học Ứng dụng, Trường Đại học Cần Thơ
  • 2 Crop Science Department, College of Agriculture and Applied Biology, Can ThoUniversity
  • 3 Bộ môn Khoa học cây trồng, Khoa Nông nghiệp, Trường Đại học Cần Thơ

    • Keywords

    Độ cứng cây, IR50404, năng suất, Oryza sativa L., paclobutrazol

    Abstract


    Lodging is one of the important factors that limitsrice yield and reducesgrain quality. Lodging obstructs the process of transporting carbohydrates fromtheleaves and stem to grains, and causes the panicles to sink into water and decompose, which causes many difficulties for harvesting. This study was conducted with the aimof determining the optimal paclobutrazol concentration with respect to the growth and hardness of rice to help limit lodging and increase the yield. The experiment was conducted in the field on the autumn-winter crop inVi Thuy District, Hau Giang province. The experiment was carried out in a randomized complete block design (RCBD) with five paclobutrazol treatments (control (spraying water without paclobutrazol), 25 mg.l-1, 50 mg.l-1, 75 mg.l-1, 100 mg.l-1) and four replications per treatment. The results showed that the treatment of paclobutrazolat a concentration of 50 mg.l-1induced the rice to increase the number of tillers, the stems’ hardness index (the lodging index was reduced),the filled grain ratio,andthe yield (6.98 tons/ha, increasing 12.1% compared to the control).

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