Sustainable weed control by allelochemicals from rye cover crops: from the greenhouse to field evidence

Adriano Marocco, Vincenzo Tabaglio, Carolina Gavazzi, M. Schulz

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

The allelopathic potential of rye crop to inhibit the weeds growth may reduce the herbicide use in Agriculture. In pot culture, four rye (Secale cereale L.) cultivars (Fasto, Forestier, Nikita, Primizia) were grown in open with two nitrogen rates (0 and 50 kg N ha-1) to determine their weed suppressiveness on three warm-season weeds (Chenopodium album L., Amaranthus retroflexus L., and Portulaca oleracea L.) in greenhouse. The contents of benzoxazinoids, DIBOA and DIBOA-Glucose were determined in rye cultivars tissues. Total benzoxazinoid content ranged from 80 to 450 μg g-1 d.m. and differed between the cultivars. Nitrogen application increased the benzoxazinoid content, 50 kg N ha-1 produced more benzoxazinoid content than 0 kg N ha-1 (258 vs. 154 μg g-1, i.e. +41% higher). The rye mulch obtained from different cultivars and from two N fertilisation levels (0 and 50 kg N ha-1) inhibited the growth of test weed spp. There was no correlation between the total benzoxazinoid content and the number of weed seedlings suppressed. The field study determined the allelopathic effects of rye cover crop on weeds (grass and broadleaf) in maize grown with two tillage systems (no-tillage, conventional tillage) at three nitrogen rates (0, 250, 300 kg N ha-1). The mulching significantly reduced the density of grass and broadleaf weeds by 61% and 96%, respectively. In no-tillage, residual nitrogen drastically reduced the broadleaf weeds density (83-90%), but the conventional tillage, increased their population (61-65%). Linear regressions between DIBOA and DIBOA-Glucose in the mulch and weed inhibition (%) were statistically significant, with R2 of 0.59 and R2 of 0.65 for grass and broadleaf weeds, respectively.
Original languageEnglish
Pages (from-to)259-274
Number of pages16
JournalAllelopathy Journal
Volume25
Publication statusPublished - 2010

Keywords

  • Allelopathy
  • Amaranthus retroflexus
  • Chenopodium album
  • Diboa
  • N fertilization
  • Portulaca oleracea
  • allelochemicals
  • allelochimici
  • allelopatia
  • concimazione azotata
  • controllo sostenibile delle infestanti
  • diboa
  • mais
  • maize
  • rye
  • segale
  • sustainable weed control

Fingerprint

Dive into the research topics of 'Sustainable weed control by allelochemicals from rye cover crops: from the greenhouse to field evidence'. Together they form a unique fingerprint.

Cite this