Microtopography causes small-scale variation in harvest and forage quality of high-yielding silage grassland in northern Germany  

作　　者：Angelika Mroncz Johannes Isselstein Martin Komainda Christoph Leuschner 

机构地区：[1]Department of Plant Ecology,Albrecht von Haller Institute for Plant Sciences,University of Goettingen,Göttingen,Germany [2]Department of Crop Sciences,Grassland Science,University of Goettingen,Göttingen,Germany

出　　处：《Grassland Research》2024年第1期33-42,共10页草地研究（英文）

基　　金：Deutsche Bundesstiftung Umwelt,Grant/Award Number:project FeuMon。

摘　　要：Background:Local sward dieback,especially in grasslands on peat soil,in response to the extreme 2018/2019 drought demonstrates climate vulnerability of intensive grasslands in northern Central Europe.Methods:We explore the influence of microtopography,that is,the within-field mosaic of depressions and elevated patches,on soil volumetric moisture content,standing biomass and biomass crude protein(CP)andfibre content in intensively managed grassland on peat soil in a moist year(2021)and a dry year(2022)for quantifying small-scale spatial heterogeneity within afield.Results:We found high within-field variation in soil moisture,biomass and forage quality and a moisture dependence of productivity that was stronger in the dry year.CP ranged from 10%to 25%within afield,being lower in moist depressions than elevated patches in the wet(but not in the dry)summer.Conclusions:The moister depressions help to limit the overall productivity decline in dry summers,whereas,in moist summers,the higher dry patches produce more protein-rich forage than the depressions,where productivity is higher but quality is lower.We recommend adapting grassland management to this heterogeneity through spatially differentiated management regimes in order to better cope with an increasingly drier and more variable climate.

关 键 词：biomass map dairy farming drought elevation differences protein content silage grassland soil 

分 类 号：S812[农业科学—草业科学]