The Winchmore Trials

McDowell, R. W.; Smith, L. C.

doi:10.1080/00288233.2012.676051

Cited by 9 publications

(9 citation statements)

References 8 publications

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“…Our results show that DOC had a negative relationship with SWC only at the 10-20 cm depth (not at the depth of 0-10 cm), being somewhat supportive to Wang and Bettany (1993) and Han et al (2010) who reported that FI could increase the leaching loss of soil DOC in shallow soil layers, leading to an increase in the DOC concentration in deep soil layers. Either under FI or under DI, SWC could be tightly associated with microbial activities, thus increasing or decreasing soil organic matter accumulation and decomposition (Gillabel et al, 2007;Butenschoen et al, 2011;McDowell and Smith, 2012;Arroita et al, 2013). In other words, either too less or too much of irrigated water in crop fields could result in an increase in soil microbial activities, leading to a reduction in decomposition rate of the soil organic matter.…”

Section: Effect Of Irrigation On Total Organic Carbon and Labile Carbonmentioning

confidence: 99%

Influences of drip and flood irrigation on soil carbon dioxide emission and soil carbon sequestration of maize cropland in the North China Plain

Guo

Peng

et al. 2017

J. Arid Land

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The need is pressing to investigate soil CO 2 (carbon dioxide) emissions and soil organic carbon dynamics under water-saving irrigation practices in agricultural systems for exploring the potentials of soil carbon sequestration. A field experiment was conducted to compare the influences of drip irrigation (DI) and flood irrigation (FI) on soil organic carbon dynamics and the spatial and temporal variations in CO 2 emissions during the summer maize growing season in the North China Plain using the static closed chamber method. The mean CO 2 efflux over the growing season was larger under DI than that under FI. The cumulative CO 2 emissions at the field scale were 1959.10 and 1759.12 g/m 2 under DI and FI, respectively. The cumulative CO 2 emission on plant rows (OR) was larger than that between plant rows (BR) under FI, and the cumulative CO 2 emission on the irrigation pipes (OP) was larger than that between irrigation pipes (BP) under DI. The cumulative CO 2 emissions of OP, BP and bare area (BA) under DI were larger than those of OR, BR and BA under FI, respectively. Additionally, DI promoted root respiration more effectively than FI did. The average proportion of root respiration contributing to the soil CO 2 emissions of OP under DI was larger than that of OR under FI. A general conclusion drawn from this study is that soil CO 2 emission was significantly influenced by the soil water content, soil temperature and air temperature under both DI and FI. Larger concentrations of dissolved organic carbon (DOC), microbial biomass carbon (MBC) and total organic carbon (TOC) were observed under FI than those under DI. The observed high concentrations (DOC, MBC, and TOC) under FI might be resulted from the irrigation-associated soil saturation that in turn inhibited microbial activity and lowered decomposition rate of soil organic matter. However, DI increased the soil organic matter quality (the ratio of MBC to TOC) at the depth of 10-20 cm compared with FI. Our results suggest that the transformation from conventional FI to integrated DI can increase the CO 2 emissions and DI needs to be combined with other management practices to reduce the CO 2 emissions from summer maize fields in the North China Plain.

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Section: Effect Of Irrigation On Total Organic Carbon and Labile Carbonmentioning

confidence: 99%

Influences of drip and flood irrigation on soil carbon dioxide emission and soil carbon sequestration of maize cropland in the North China Plain

Guo

Peng

et al. 2017

J. Arid Land

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“…Optimal nitrogen and phosphorus management is critical Cameron 2000, 2007;Condron et al 2006;McDowell and Smith 2012) but this also extends to other chemical elements. Widespread deficiencies of S, Cu, Co, Zn, Mg, Se, I, B, Mo, Mn, and Fe in plants and animals in New Zealand are also well defined; 20-30% of farms are micronutrient deficient; fertilizers and supplements are routinely provided to crops and stock (Will 1990;Grace 1992;Condron et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Endemic Plants as Browse Crops in Agricultural Landscapes of New Zealand

Dickinson

Marmiroli

Das

et al. 2014

Agroecology and Sustainable Food Systems

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We investigated the benefits of restoring native plants to intensive agricultural landscapes of New Zealand. As a browse crop on paddock borders, endemic species potentially could add value to more sustainable food systems. Their foliage was found to contain less nitrogen but higher concentrations of a range of trace elements and tannins than both ryegrass and border-planted willows. While native plants could reduce the need for feed supplements, we conclude that the small amount consumed would provide negligible overall nutritional benefits to stock. Nevertheless, this may provide added justification for endemic species and agroecology in landscapes with a depauperate native biodiversity.

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“…In dairy pastures there is a complex but well studied relationship between nutrient cycling, grazing effects and plant and soil properties (McDowell and Smith 2012;Mikola et al 2009). Widespread geographical deficiencies of a number of trace elements (Cu, Co, Zn, Mg, Se, I) in plants and animals in New Zealand are well defined; 20-30% of farms are deficient and fertilisers and supplements are routinely provided for both crops and stock.…”

Section: Introductionmentioning

confidence: 99%

The Phytoremediation Potential of Native Plants on New Zealand Dairy Farms

Hahner

Robinson

Zhong

et al. 2014

International Journal of Phytoremediation

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Ecological restoration of marginal land and riparian zones in agricultural landscapes in New Zealand enhances the provision of above-ground ecosystem services. We investigated whether native endemic plant assemblages have remediation potential, through modifying soil nutrient and trace element mobility. Analysis of native plant foliage in situ indicated that selective uptake of a range of commonly deficient trace elements including Zn, B, Cu, Mn and Co could provide a browse crop to avoid deficiencies of these elements in livestock, although some native plants may enhance the risk of Mo and Cd toxicity. Native plant rhizospheres were found to modify soil physico-chemistry and are likely to influence lateral and vertical fluxes of chemical elements in drainage waters. Native plants on marginal land in agricultural landscapes could add value to dairy production systems whilst helping to resolve topical environmental issues.

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The Winchmore Trials

Cited by 9 publications

References 8 publications

Influences of drip and flood irrigation on soil carbon dioxide emission and soil carbon sequestration of maize cropland in the North China Plain

Influences of drip and flood irrigation on soil carbon dioxide emission and soil carbon sequestration of maize cropland in the North China Plain

Endemic Plants as Browse Crops in Agricultural Landscapes of New Zealand

The Phytoremediation Potential of Native Plants on New Zealand Dairy Farms

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