Glyphosate-resistant soybeans yield in function of glyphosate salts, doses and stadium phenological

Authors

  • Lucas Alfonso Rohr Instituto Federal do Rio Grande do Sul
  • Rafaela Cinelli Instituto Federal do Rio Grande do Sul
  • Rubens Antonio Polito Instituto Federal do Rio Grande do Sul
  • Tamara Heck Instituto Federal do Rio Grande do Sul
  • Noryam Bervian Bispo Instituto Federal do Rio Grande do Sul
  • Anderson Luis Nunes Instituto Federal do Rio Grande do Sul

DOI:

https://doi.org/10.14393/BJ-v36n4a2020-48079

Keywords:

Isopropylamine salt, Potassium salt, Ammonium salt, Growth habit, Glycine max

Abstract

Given the importance of soybean to the global economy and as a food source, improving crop management techniques is integral to obtaining higher yields. As such, this study aimed to assess the yield of soybean cultivars as a function of different glyphosate salt formulations, doses and application times. Two field experiments were conducted simultaneously using a randomized block design and 3x4x2 factorial scheme, with three repetitions. Factor A consisted of three glyphosate formulations: isopropylamine salt (Roundup Original®), ammonium salt (Roundup WG®), and potassium salt (Zapp Qi®), factor B four application times: 0, 14, 28, 42 days after planting (DAP), and factor C two doses: the recommended dose of 720 grams of acid equivalent per hectare and twice that (1440 grams of acid equivalent per hectare). There was no difference between the glyphosate salts for the BMX Ativa RR® cultivar, but yields of BMX Apolo RR® submitted to ammonium salt were 28% higher than those recorded for the other salts studied. Glyphosate potassium salt resulted in lower soybean yields. Potassium salt application between 14 and 28 DAP caused greater toxicity in both the soybean cultivars analyzed.

 

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Published

2020-05-25

How to Cite

ROHR, L.A., CINELLI, R., POLITO, R.A., HECK, T., BISPO, N.B. and NUNES, A.L., 2020. Glyphosate-resistant soybeans yield in function of glyphosate salts, doses and stadium phenological. Bioscience Journal [online], vol. 36, no. 4, pp. 1231–1237. [Accessed8 December 2022]. DOI 10.14393/BJ-v36n4a2020-48079. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/48079.

Issue

Section

Agricultural Sciences