Growth and development of honey weed based on days or thermal units

Planta Daninha

Silva, A.P.P.¹  Machado, E.C.R.¹  Marques, B.S.¹  Instituto Federal do Sul de Minas Gerais, Machado, Brasil¹  Carvalho, S.J.P.¹  Gonçalves, M.F.¹  Lima, R.S.O.¹ 

关键词: Leonurus sibiricus;    growing degree days;    phenology;    dry mass;    biology.;   

DOI  :  10.1590/S0100-83582014000100009

学科分类：农业科学（综合）

来源: Sociedade Brasileira da Ciencia das Plantas Daninhas (S B C P D) / Brazilian Society of Herb Science

【 摘 要 】

This work was carried out with the objective of evaluating the growth and development of honey weed (Leonurus sibiricus) based on days or thermal units (growing degree days). Thus, two independent trials were developed to quantify the phenological development and total dry mass accumulation in increasing or decreasing photoperiod conditions. Considering only one growing season, honey weed phenological development was perfectly fit to day scale or growing degree days, but with no equivalence between seasons, with the plants developing faster at increasing photoperiods, and flowering 100 days after seeding. Even day-time scale or thermal units were not able to estimate general honey weed phenology during the different seasons of the year. In any growing condition, honey weed plants were able to accumulate a total dry mass of over 50 g per plant. Dry mass accumulation was adequately fit to the growing degree days, with highlights to a base temperature of 10 oC. Therefore, a higher environmental influence on species phenology and a lower environmental influence on growth (dry mass) were observed, showing thereby that other variables, such as the photoperiod, may potentially complement the mathematical models.

【 授权许可】

Unknown