COMPETITION AND FACILITATION EFFECTS OF DIFFERENTIAL INTRA- AND INTER-ROW WEED MANAGEMENT IN SUGARCANE

Abstract : Differential intra- and inter-row weed management can be a mean to reduce herbicide use in sugarcane. In 2011, a field experiment was conducted in La Reunion Island to assess inter-row weed competition. Four inter-row weed competition treatments for a duration of one (T1), two (T2), three (T3) and four (T4) months after planting were compared in a randomized complete block design with 5 replicates; treatment plots were paired with non-weeded inter-row control plots. All intra-rows where kept weed-free all season long. Weeds covered 100% of the inter-rows by three months after planting. Sugarcane grew far above the weed canopy, completely closing the canopy between the rows for all treatments. Sugarcane yield decreased by 13 t/ha/month of early weed competition. However, the control yield, expected to be lower than T4, was similar to the T3 treatment. This suggests a late facilitation effect of the inter-rows vegetation in control plots which partially compensates for its early competition effect. This may be due to the particular flora of our experiment, with high populations of N-fixing weeds and broom weeds. The root length density profiles observed in a couple of plots may support the facilitation hypothesis. However, additional research is needed to corroborate this singular result.
Document type :
Conference papers
Complete list of metadatas

Cited literature [12 references]  Display  Hide  Download

http://hal.cirad.fr/cirad-01022780
Contributor : José Martin <>
Submitted on : Thursday, June 6, 2019 - 4:19:10 PM
Last modification on : Thursday, June 13, 2019 - 1:20:09 AM
Long-term archiving on : Monday, September 30, 2019 - 4:47:33 PM

File

COLUMA_2013_Martin_JosA_RUN_Co...
Explicit agreement for this submission

Identifiers

  • HAL Id : cirad-01022780, version 1

Collections

Citation

José Martin, Maxime Chabalier, Philippe Letourmy, Jean-Louis Chopart, Ernest Arhiman, et al.. COMPETITION AND FACILITATION EFFECTS OF DIFFERENTIAL INTRA- AND INTER-ROW WEED MANAGEMENT IN SUGARCANE. 22e conférence du COLUMA, journées internationales sur la lutte contre les mauvaises herbes, AFPP, Dec 2013, Dijon, France. pp.CD. ⟨cirad-01022780⟩

Share

Metrics

Record views

16

Files downloads

7