Weed germinable seedbanks of rice–wheat systems in the Eastern Indo-Gangetic Plains: do tillage and edaphic factors explain community variation?

dc.creatorLowry, C.J.
dc.creatorBrainard, D.C.
dc.creatorKumar, V.
dc.creatorSmith, R.G.
dc.creatorSingh, M.
dc.creatorKumar, P.
dc.creatorKumar, A.
dc.creatorKumar, V.
dc.creatorRajiv K. Joon
dc.creatorJat, R.K.
dc.creatorPoonia, S.P.
dc.creatorMalik, R.
dc.creatorMcdonald, A.
dc.date2021-09-29T00:25:14Z
dc.date2021-09-29T00:25:14Z
dc.date2021
dc.date.accessioned2023-07-17T20:08:07Z
dc.date.available2023-07-17T20:08:07Z
dc.identifierhttps://hdl.handle.net/10883/21671
dc.identifier10.1111/wre.12505
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7513448
dc.descriptionZero tillage (ZT) is widely promoted throughout India's Eastern Indo-Gangetic Plains (IGP) because of its potential to increase wheat productivity and resilience to abiotic stresses. Weeds remain a major barrier to ZT adoption, yet it remains unclear how ZT will influence weed communities in the Eastern-IGP. The primary objective of this study was to characterise the composition of the germinable weed seedbank sampled just prior to the wheat phase of rice–wheat farms in Bihar and Eastern Uttar Pradesh, and examine whether adoption of ZT wheat has shifted weed community composition compared to conventional tillage (CT). Additionally, we examined whether edaphic properties and topography (upland vs. lowland) explain variation in germinable weed seedbank communities. In December 2014, we evaluated the germinable seedbank from 72 fields differing in their historic (>=3 year) tillage practices (ZT vs. CT) in three regions: Samastipur–Vaishali–Muzaffarpur (SVM), Ara–Buxar and Maharajgunj–Kushinagar. Weed community composition and species richness varied by region and topography. ZT adoption was associated with lower relative density of Chenopodium album in the germinable seedbank and lower emergence of Phalaris minor seedlings within farmers’ fields. In upland topographies of the SVM region, ZT adoption was also associated with greater relative abundance of Solanum nigrum in the weed seedbank. However, differences between tillage systems in individual species were not large enough to result in detection of differences at the whole-community level. Variation in edaphic properties, most notably soil texture and pH, explained 51% of the variation in the weed seedbank community. Our work suggests several frequent but poorly understood species (e.g. Mazus pumilus and Grangea maderaspatana) in Eastern IGP for which future research should quantify their effects on crop yields. Finally, future work surveying weed species abundance at harvest could further determine the dominant problematic species in these regions.
dc.description475-485
dc.languageEnglish
dc.publisherWiley
dc.relationhttps://onlinelibrary.wiley.com/doi/10.1111/wre.12505#support-information-section
dc.rightsCIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose
dc.rightsOpen Access
dc.source6
dc.source61
dc.source1365-3180
dc.sourceWeed Research
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectWeed Community Composition
dc.subjectWeed Diversity
dc.subjectCONSERVATION TILLAGE
dc.subjectRICE
dc.subjectWEEDS
dc.subjectWHEAT
dc.subjectZERO TILLAGE
dc.titleWeed germinable seedbanks of rice–wheat systems in the Eastern Indo-Gangetic Plains: do tillage and edaphic factors explain community variation?
dc.typeArticle
dc.typePublished Version
dc.coverageUnited Kingdom


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