搜索结果: 1-10 共查到“畜牧学 U.S. grasslands”相关记录10条 . 查询时间(0.075 秒)
Ozark Grasslands Experience Major Increase In Trees And Shrubs（图）
Ozark Grasslands Major Increase Trees Shrubs
2017/10/24
Woody vegetation, such as trees and shrubs, has increased dramatically in Ozark grasslands over the past 75 years, according to a study published this week in the journal Landscape Ecology.The study e...
Stanford study shows U.S. grasslands affected more by atmospheric dryness than precipitation
Stanford U.S. grasslands atmospheric dryness precipitation
2017/3/30
A new study showing dryness of the atmosphere affects U.S. grassland productivity more than rainfall could have important implications for predicting how plants will respond to warming climate conditi...
Warmer,wetter climate would impair California grasslands
Warmer wetter climate California grasslands
2016/9/12
Results from one of the longest-running and most extensive experiments to examine how climate change will affect agricultural productivity show that California grasslands will become less productive i...
In grasslands,longer spring growing season offsets higher summer temperatures
grasslands spring growing season higher summer temperatures
2016/3/2
Grasslands across North America will face higher summer temperatures and widespread drought by the end of the century, according to a new study.But those negative effects in vegetation growth will be ...
The American Forage and Grassland Council (AFGC) is an international organization made up of 20 affiliate councils in the United States and Canada with a total individual membership of about 2,500. O...
Grazing alters ecosystem functioning and C:N:P stoichiometry of grasslands along a regional precipitation gradient
China–Mongolia transect N and P co-limitation N cycling plant and soil C N and P pools plant functional group composition primary production stoichiometry the Eurasian steppe
2015/2/4
The Eurasian steppe has long been subject to grazing by domestic ungulates at high levels, resulting in widespread deterioration of biodiversity and ecosystem services. While abundant evidence demonst...
Short-t erm responses of a Stipa grandis/Leymus chinensis community to frequent defoliation in the semi-arid grasslands of Inner Mongolia, China
Grassland degradation Semi-arid Inner Mongolia Defoliation Productivity
2015/2/4
Grassland degradation due to over-grazing causes severe ecological and economical problems in the semi-arid grasslands of Inner Mongolia, PR China. The development of sustainable management systems is...
Scale-dependent relationships between plant diversity and above-ground biomass in temper ate grasslands, south-eastern Mongolia
Above-ground biomass Community Ecological levels Ecosystem Geographical scales Plant functional types Species Steppe
2015/2/4
Relationships between plant diversity (H diversity index) and above-ground biomass (as a surrogate of productivity) were analysed using quadrat data and biomass measures from a precipitation gradient ...
Perennial grasslands and agroenvironmental programme effects
grasslands agroenvironmental programmes organic farming subventions
2010/1/19
Farming on grasslands is an important part of organic faming. There is a perceptible
trend of increasing acreages of grasslands in organic farming in the Czech republic too.
Adjustment of subvent...
Biodiversity in intensive grasslands: Effect of management, improvement and challenges
grassland biodiversity intensification improvement challenge
2010/1/13
Intensified grasslands are usually the dominant type of grassland in many countries in Europe but are generally of poor ecological value. Several management factors may affect biodiversity of these gr...