Impacts of different types of lawns on soil microbial biomass and labile organic carbon
Lawn has various functions such as preventing water loss and soil erosion,beautifying the environment,designing landscape,providing outdoor leisure activity venues,and improving regional ecological environment.To explore the impacts of different types of lawns on soil microbial biomass and labile organic carbon,this study used six common types of turfgrass including C.dactylon as experimental materials,set up two experimental treatments as"maintain natural state(MNS)"and"manually removal weeds(MRW)",continuously managed and maintained for five years,collected the topsoil with 0-10 cm depth after five years,and determined six sets of data,including the content of soil total carbon and nitrogen,the content of soil microbial biomass carbon and nitrogen,the content and turnover rate of soil labile organic carbon.The results showed that the six sets of data mentioned above all reached their maximum values in three types of lawns of Buchloe dactyloides,Lolium perenne and Trifolium repens,respectively,with mean values of around 50.00 g/kg,7.00 g/kg,1.90 g/kg,0.40 g/kg,5.70 g/kg and 0.65/cycle in the experimental treatment with MNS;the above six sets of data all decreased down to their minimum values in the lawn of Cynodon dactylon;this indicated that B.dactyloides,L.perenne and T.repens had the most pronounced impacts on soil microbial biomass and labile organic carbon,followed by Agrostis stolonifera and Festuca elata,and C.dactylon had the weakest impacts.Meanwhile,the above six sets of data in the experimental treatment of MNS were all significantly higher than the corresponding data in the experimental treatment of MRW for the same experimental material.The results of data analyses also showed that the impacts of three types of lawns,including B.dactyloides,L.perenne and T.repens,on the six sets of data mentioned above were mostly significant.Therefore,lawn builders and managers in different regions should choose appropriate types of turfgrass based on their botanical characteristics,combined with local climate factors,soil conditions,and lawn use purposes,to ensure lawn quality and improve lawn use efficiency,while promoting the healthy development of their underground soil ecosystem.
turfgrasscontent of soil total carboncontent of soil total nitrogencontent of soil microbial biomass carboncontent of soil microbial biomass nitrogencontent of soil labile organic carbonturnover rate of soil labile organic carbon
万方数据
维普
