Abstract
Weeds negatively influence agricultural production. However, those losses depend on weed specie, its time of emergence, and period of interference on agricultural crops. Synthetic herbicides are commonly used to control these plants species; however, they may cause damage to the environment, human beings and animals health, and this problem justify the need to develop alternative bioherbicides. To evaluate the allelopathic potential of Ricinus communis (Castor bean) and light spectrum variation on the emergence and growth of Cyperus rotundus L., a trial was carried out in a protected environment with 15% of brightness reduction at the Center for Agricultural and Environmental Sciences at the Paraíba State University. Four aqueous extract concentrations of R. communis leaves were tested (0, 5, 10, and 15%) and four light spectrums variations (white, purple, blue, and red lights). Variables such as emergence, length, dry matter accumulation and growth rates of shoots and root of C. rotundus seedlings were assessed. Data were analyzed by normality test, analysis of variance, polynomial regression, and averages test. Soot and root emergence, length, and dry matter accumulation of C. rotundus seedlings were reduced due to the allelopathy caused by R. communis aqueous extract leaves (15% concentration) and under purple or red light spectrum radiation.
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Claims 3
Claim · model-written summary
A 15% Ricinus communis leaf extract reduced Cyperus seedling shoot and root emergence, length and dry matter accumulation.
- Taxon
- C. rotundus
Cyperus rotunduse0 - Treatment
- R. communis aqueous extract leaves (15% concentration)e0
- Interactor
- R. communis
Ricinus communise0other - Outcome
- Soot and root emergence, length, and dry matter accumulatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soot and root emergence, length, and dry matter accumulation of C. rotundus seedlings were reduced due to the allelopathy caused by R. communis aqueous extract leaves (15% concentration) and under purple or red light spectrum radiation.”
t0“Cyperus rotundus”
Claim · model-written summary
Purple light reduced Cyperus seedling shoot and root emergence, length and dry matter accumulation.
- Taxon
- C. rotundusCyperus rotunduse0
- Treatment
- purplee0
- Outcome
- Soot and root emergence, length, and dry matter accumulatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soot and root emergence, length, and dry matter accumulation of C. rotundus seedlings were reduced due to the allelopathy caused by R. communis aqueous extract leaves (15% concentration) and under purple or red light spectrum radiation.”
Claim · model-written summary
Red light reduced Cyperus seedling shoot and root emergence, length and dry matter accumulation.
- Taxon
- C. rotundusCyperus rotunduse0
- Treatment
- red light spectrum radiatione0
- Outcome
- Soot and root emergence, length, and dry matter accumulatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soot and root emergence, length, and dry matter accumulation of C. rotundus seedlings were reduced due to the allelopathy caused by R. communis aqueous extract leaves (15% concentration) and under purple or red light spectrum radiation.”