Effects of polyethylene mulch in a short-rotation, poplar plantation vary with weed-control strategies, site quality and clone

Green, D.Scott; Kruger, Eric L.; Stanosz, G. R.

doi:10.1016/s0378-1127(02)00003-8

Cited by 51 publications

(52 citation statements)

References 19 publications

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“…This includes leaf morphology and leaf growth [53], leaf photosynthetic capacity [54], nutrient requirements [55], nutrient-use efficiency [56], water-use efficiency [57], lightuse efficiency [58], phenotypic plasticity in response to differential N availability [59], early-rooting ability and rooting patterns [60][61][62], size, distribution and orientation of leaves and branches [63][64][65], wood density [66], and so forth. A favourable combination of many of these morphological, physiological and phenological characteristics explains the superior growth of selected hybrid poplar clones [8].…”

Section: Discussionmentioning

confidence: 99%

Clone-Specific Response in Leaf Nitrate Reductase Activity among Unrelated Hybrid Poplars in relation to Soil Nitrate Availability

Fortier¹,

Truax²,

Gagnon³

et al. 2012

International Journal of Forestry Research

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In this field study, we used in vivo NRA activity in hybrid poplar leaves as an indicator of NO 3 − assimilation for five unrelated hybrid poplar clones. We also examined if leaf NRA of these clones is influenced to the same extent by different levels of soil NO 3 − availability in two riparian agroforestry systems located in pastures. Leaf NRA differences of more than one order of magnitude were observed between the clones, clearly showing their different abilities to reduce NO 3 − in leaves. Clone DxN-3570, a P. deltoides x P. nigra hybrid (Aigeiros intrasectional hybrid), always had the highest leaf NRA during the field assays. This clone was also the only one to increase its leaf NRA with increasing NO 3 − soil availability, which resulted in a significant Site x Clone interaction and a positive relationship between soil NO 3 − concentration and NRA. All of the four other clones studied had one or both parental species from the Tacamahaca section. They had relatively low leaf NRA and they did not increase their leaf NRA when grown on the NO 3 − rich site. These results provide evidence that NO 3 − assimilation in leaves varies widely among hybrid poplars of different parentages, suggesting potential preferences for N forms.

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Section: Discussionmentioning

confidence: 99%

Clone-Specific Response in Leaf Nitrate Reductase Activity among Unrelated Hybrid Poplars in relation to Soil Nitrate Availability

Fortier¹,

Truax²,

Gagnon³

et al. 2012

International Journal of Forestry Research

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“…Overall, plastic mulch did not improve growth of the species when compared with the herbicide treatment. Green et al (2003) showed early growth improvements for poplar with plastic mulch in short-rotation woody crop plantations on low quality sites; the benefit was less evident on high quality sites. Our site was considered to have medium agricultural capability.…”

Section: Effects Of Weed Control On Survival and Seedling Growth Paramentioning

confidence: 96%

“…Plastic mulch modifies surface radiation and reduces soil moisture losses through evaporation (Liakatas et al 1986, Tanner 1974. This strongly affects soil temperature and soil moisture in the root zone, and in turn influences plant growth and productivity (Litzow and Pellett 1983, Robinson 1988, Truax and Gagnon 1993, Tarara 2000, Green et al 2003. Positive effects of microclimate changes owing to mulch application have been reported on the phenology, yield, and quality of certain crops (Maiero et al 1987, Bhella 1988, Wien and Minotti 1988.…”

Section: Introductionmentioning

confidence: 99%

Effect of weed control methods on growth of five temperate agroforestry tree species in Saskatchewan

Schroeder

Naeem

2017

The Forestry Chronicle

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Most tree species in agroforestry plantings are intolerant to vegetative competition and sites must be intensively cultivated to eliminate weeds. Many studies have been conducted to investigate what factors limit seedling growth because of the presence of vegetative competition in forest environments; however on agricultural sites there are few studies on weed management options for tree planting. This research quantified and compared growth of Manitoba maple (Acer negundo), green ash (Fraxinus pennsylvanica), Colorado spruce (Picea pungens), Scots pine (Pinus sylvestris) and Walker poplar (Populus x Walker) in response to combinations of in-row and between-row weed control methods. The study was established on an agroforestry planting on agricultural soils in Saskatchewan. Treatments included in-row weed control using herbicides or plastic mulch and between-row weed control using tillage compared with a non-weeded control. Weed control positively affected annual height increment, basal diameter and height of the agroforestry species. The impacts of weed control versus no weed control were significant in almost all instances. However, tree species responded differently to the method of weed control. Weed control by herbicide and plastic mulch were not significantly different for four of the five species under investigation. This research will help with prescribing weed control methods for agroforestry and afforestation plantings on agricultural soils.Key words: weed control, agroforestry, tree growth, plastic mulch, tillage, herbicide RÉSUMÉLa plupart des essences plantées en agroforesterie tolèrent mal la végétation compétitive et il faut donc effectuer un travail intensif du sol sur ces sites pour en éliminer les mauvaises herbes. Pour le milieu forestier on dénombre plusieurs études sur les facteurs qui affectent la croissance des semis lorsqu'ils sont soumis à une compétition végétale; en milieu agricole, les études se font toutefois plus rares sur les moyens pour contrôler les mauvaises herbes en plantation. Ce projet aura permis de quantifier et de comparer la croissance de l' érable négondo (Acer negundo), du frêne vert (Fraxinus pennsylvanica), de l' épinette du Colorado (Picea pungens), du pin d'Écosse (Pinus sylvestris) et du peuplier hybride Walker (Populus x Walker) en réponse à diverses combinaisons de méthodes de désherbage dans les rangées de plants et entre celles-ci. Le dispositif d' étude a été établi dans une plantation agroforestière sur des terres agricoles de la Saskatchewan. Les traitements comprenaient un désherbage dans les rangées à l'aide d'herbicides ou de paillis de plastique, un travail du sol entre les rangées et enfin un témoin sans désherbage. Le désherbage a eu un effet positif sur la croissance annuelle en hauteur, la surface terrière et la hauteur des espèces agroforestières. Le désherbage a eu un impact significatif dans presque tous les cas en comparaison avec la situation sans traitement. Toutefois, les essences forestières n' ont eu les mêmes réac-tions aux divers ...

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“…Mulches can include natural materials such as straw, composted material, bark, or wood chips; recycled materials such as newspaper or fibre slurries; or can utilise specialist material fit for purpose such as biodegradable (starch based) or conventional plastic "poly" mulch sheets. The use of which is much depending on the quality of the site and the intensity of the accompanying management operations [15].…”

Section: Introductionmentioning

confidence: 99%

Influence of Different Tillage Systems and Weed Treatments in the Establishment Year on the Final Biomass Production of Short Rotation Coppice Poplar

Morhart

Sheppard

Seidl

et al. 2013

Forests

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Abstract:In this study the influence of three different tillage systems in combination with eight varying weed treatments applied within the establishment year and its effect on the final above ground leafless biomass production (after the third growing season) of short rotation coppice poplar is presented. The three tillage systems included variants with ploughing and harrowing, variants with cultivation and ley cropping and variants without tillage. Weed treatments included the application of different herbicides, but also more environmentally sound variants such as mulching and the use of mulch materials to avoid the use of herbicides. To estimate the influence on final biomass production, regression analysis was undertaken using DBH as the predictor variable. Based on 1056 DBH measurements the biomass production of the different variants was compared. The interactions of tillage system and weed treatment on biomass yield were found to be statistically significant. Between tillage systems the ploughing variant displayed a better overall performance than the cultivation with ley crop variant and the variant without any tillage. Differing weed treatments reveal greater success for the whole area application of herbicides than band application, both being better than the use of mulch materials. These results suggest that the right tillage system in combination with effective chemical weed OPEN ACCESSForests 2013, 4 850 control is the key to the successful establishment of Short rotation coppice (SRC) poplar plantation following the principles of an integrated weed management approach. Furthermore, ecological variants such as ploughing in combination with the use of mulch materials and mechanical vegetation control between the rows could be a solution to reduce dependence on chemical control. However, this comes at the expense of a considerable loss in yield.

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Effects of polyethylene mulch in a short-rotation, poplar plantation vary with weed-control strategies, site quality and clone

Cited by 51 publications

References 19 publications

Clone-Specific Response in Leaf Nitrate Reductase Activity among Unrelated Hybrid Poplars in relation to Soil Nitrate Availability

Clone-Specific Response in Leaf Nitrate Reductase Activity among Unrelated Hybrid Poplars in relation to Soil Nitrate Availability

Effect of weed control methods on growth of five temperate agroforestry tree species in Saskatchewan

Influence of Different Tillage Systems and Weed Treatments in the Establishment Year on the Final Biomass Production of Short Rotation Coppice Poplar

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