^ШХР: *http://onlinelibrary.wiley.com/journal/10.1111/issues (http://onlinelibrary.wiley.com/journal/10.1111/issues)
^АВТ: Bourdot G.W.; Hurrell G.A.; Trolove M.; Saville D.J.
^ЗГЛ: Seasonal dynamics of ground cover in Cirsium arvense - a basis for estimating grazing losses and economic impacts [Анализ сезонной динамики плотности популяций бодяка полевого на выпасаемых пастбищах в Новой Зеландии и прогнозирование на его основе снижения продуктивности пастбищ и связанных с ним экономических потерь]
^ВЫХ: Weed Research, 2016; Vol.56,N 2. - P. 179-191
^ДАТ: 2016
^ПРМ: Bibliogr.:p.190-191
+Реферат:

^РЕФ: Analysis of the economics of managing Cirsium arvense in grazed pastures worldwide has been hampered by a lack of data on the within-year seasonal dynamics of the weed and its impact on the yield of palatable herbage. To redress this, the seasonal pattern in within-patch percentage ground cover of the weed was determined from measurements on 39 dairy and 66 sheep and/or beef cattle farms in New Zealand during 2009-2010 and 2010-2011. This pattern was then scaled using farmer estimates of peak whole-farm cover to derive mean monthly covers for dairy, beef, sheep/beef, sheep and deer farms. These monthly covers corresponded, respectively, to mean annual percentage covers of 2.7, 1.7, 3.0, 5.9 and 2.9% and to mean annual percentage losses in pasture growth (palatable herbage yield) of 3.6, 2.3, 4.0, 7.8 and 3.9%. The latter, in combination with 2011-2012 farm statistics, revealed that C. arvense caused a national loss in pastoral farm gross revenue in New Zealand in 2011-2012 of $685 million ($446 m dairy, $233 m sheep/beef, $6 m deer). Beyond the scope of this paper, the monthly covers and their corresponding monthly losses in pasture growth provide a basis for modelling the economic impacts of C. arvense and its management at a farm scale. More generally, the analytical method that we have developed is appropriate for evaluating the economic impact of any weed in a grazed pasture, particularly those exhibiting pronounced seasonal patterns in occupancy, such as annuals and deciduous perennials. aref1

^TRN: 1723315
^ВИД: Статья из книги
^ЯЗК: Английский
+Индексирование:
^РУБ: 68_37_33_47
^УДК: 633.2.03:632.51
^ТЕР: ПАСТБИЩА (Pastures). СОРНЯКИ (Weeds). БОДЯК. CIRSIUM ARVENSE [БОДЯК ПОЛЕВОЙ]. ДИНАМИКА ПОПУЛЯЦИЙ (Population dynamics). СЕЗОННАЯ ДИНАМИКА [СЕЗОННАЯ ИЗМЕНЧИВОСТЬ]. МОДЕЛИРОВАНИЕ. ПРОГНОЗИРОВАНИЕ (Forecasting). ПРОДУКТИВНОСТЬ. ЭКОНОМИЧЕСКИЙ УЩЕРБ. НОВАЯ ЗЕЛАНДИЯ (New Zealand).
^РТЗ: ASTERACEAE [COMPOSITAE; АСТРОВЫЕ; СЛОЖНОЦВЕТНЫЕ]. ASTERALES [АСТРОЦВЕТНЫЕ]. CIRSIUM. ДИНАМИКА [ВРЕМЕННАЯ ИЗМЕНЧИВОСТЬ]. ЗЕМЕЛЬНЫЕ РЕСУРСЫ (Land resources). ЛУГОПАСТБИЩНЫЕ УГОДЬЯ [ЛУГОПАСТБИЩА]. МЕТОДЫ (Methods). МЕХАНИКА (Mechanics). ОКЕАНИЯ (Oceania). ПОПУЛЯЦИИ. ПОТЕРИ (Losses) [УБЫТКИ]. ПРИРОДНЫЕ РЕСУРСЫ (Natural resources). С-Х ЗЕМЛИ. С-Х УГОДЬЯ [СЕЛЬСКОХОЗЯЙСТВЕННЫЕ УГОДЬЯ]. СЕЗОННОСТЬ (Seasonality). СТРАНЫ АТЭС. СТРАНЫ МИРА. ФИЗИЧЕСКИЕ НАУКИ (Physical science; Physics). ЭКОНОМИЧЕСКИЙ АНАЛИЗ (Economic analysis).

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