The general amount and the seasonal distribution of
precipitation is a further key factor for determining the degree
of success or failure of a crop cultivated within alley cropping
systems. Hedgerows planted in alley cropping systems can
cause a reduction in the evaporation of soil moisture which is
associated with an increase in the amount of soil water
available to crops. This is of special importance for temperate
low rainfall regions and is particularly interesting when
considered against the background of predicted hotter
summers with lower overall precipitation that are predicted
to occur more frequently in light of climate change (Solomon
et al., 2007). Hedgerows can reduce soil evaporation in
different ways such as by shading, by the creation of a rain
shadow on the leeward side or trapping rainfall on the
windward side or through the more even distribution and in
addition increasing accumulation of snow, which is an
important source of rechargeable soil moisture. Hedgerows
intercept the snow and hold it on the cropland for subsequent
soil moisture recharge following spring snowmelt, thus
capturing this critical source of soil moisture (Scholten, 1988).
In the authors’s own research on a short rotation alley
cropping system on a post-mining area within Brandenburg
(NE Germany), the impact of black locust hedgerows on soil
water content (soil depth 30 cm) within 18m wide alleys was
investigated. Soil moisture in the protected alleys was
significantly higher compared to an adjacent unsheltered site
The general amount and the seasonal distribution ofprecipitation is a further key factor for determining the degreeof success or failure of a crop cultivated within alley croppingsystems. Hedgerows planted in alley cropping systems cancause a reduction in the evaporation of soil moisture which isassociated with an increase in the amount of soil wateravailable to crops. This is of special importance for temperatelow rainfall regions and is particularly interesting whenconsidered against the background of predicted hottersummers with lower overall precipitation that are predictedto occur more frequently in light of climate change (Solomonet al., 2007). Hedgerows can reduce soil evaporation indifferent ways such as by shading, by the creation of a rainshadow on the leeward side or trapping rainfall on thewindward side or through the more even distribution and inaddition increasing accumulation of snow, which is animportant source of rechargeable soil moisture. Hedgerowsintercept the snow and hold it on the cropland for subsequentsoil moisture recharge following spring snowmelt, thuscapturing this critical source of soil moisture (Scholten, 1988).In the authors’s own research on a short rotation alleycropping system on a post-mining area within Brandenburg(NE Germany), the impact of black locust hedgerows on soilwater content (soil depth 30 cm) within 18m wide alleys wasinvestigated. Soil moisture in the protected alleys wasอย่างมีนัยสำคัญสูงเมื่อเทียบกับเว็บไซต์ unsheltered อยู่ติดกัน
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