Plant density affects light interception and yield in cotton grown as companion crop in young jujube plantations

D. Zhang, L. Zhang, Jianguo Liu, S. Han, Q. Wang, J.B. Evers, Jun Liu, W. van der Werf, L. Li

Research output: Contribution to journalArticleAcademicpeer-review

33 Citations (Scopus)

Abstract

Tree-crop mixturesmayincreaseyieldandrevenueespeciallyduringtheearlyyearsoftreeplantations. Jujube isgrownwidelyinChinafortheirfruits,andcottonisgainingpopularityasanunderstorycropin young jujubeplantations.Thereisaneedforinformationonproductivityandoptimalplantingdensities of cottoninthesemixedsystems.Fieldexperimentswerecarriedoutin2012and2013inHetian,Xinjiang, China. Threecottonplantdensities(13.5,18.0and22.5plantsm-2) weretestedin6–7yearsoldjujube plantations, inwhichthecottonwasgrownina6m-widespacebetweenthetreerows.Cottonleafarea index increasedbutplantheightdecreasedwithplantdensity.Cottonlightinterceptionincreasedwith density, butatearlyandmid-season,thedifferenceinlightinterceptionbetween18.0and22.5plantsm-2 was onlymarginal.Increasingplantdensitymodifiedthedistributionpatternofthelightwithinthe canopy, thusaffectedoverallcottonlightinterceptionanduseefficiency.Thehighestyieldandlight use efficiencyofcottonwereachievedat18.0plantsm-2. Spatialdistributionsoflightintensitiesand extinction coefficientswereaffectedbytheshadingofjujubetreeswithinthecottoncanopyinthe intercrop. Jujubegrowth,yieldandlightutilizationwerenotsignificantlyaffectedbycottonplantdensity. We concludethattheproductivityandlightutilizationofcottoninjujube-cottonintercroppingcanbe increased byoptimizingcottonplantdensity.
Original languageEnglish
Pages (from-to)132-139
JournalField Crops Research
Volume169
DOIs
Publication statusPublished - 2014

Keywords

  • radiation-use efficiency
  • agroforestry systems
  • relay intercrops
  • leaf senescence
  • photosynthesis
  • competition
  • components
  • sunflower
  • genotypes
  • nitrogen

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