Soil Organic Matter Recovery on Conservation Reserve Program Fields in Southeastern Wyoming Export

@article{citeulike:5406390, abstract = {Soil C and N changes following cessation of cultivation in semiarid soils is not well understood. We hypothesized that returning cultivated fields in southeastern Wyoming to perennial grasses through the Conservation Reserve Program (CRP) would (i) increase labile pools of soil organic matter (SOM), and (ii) increase small-scale heterogeneity of SOM. Carbon and N in labile and passive pools of SOM were measured in CRP fields seeded with perennial grasses intermediate wheatgrass (Elytrigia intermedia [Host] Nevski ssp. intermedia), pubescent wheatgrass (Elytrigia intermedia [Schur.] A. Love ssp. barbulata) and smooth brome (Bromus inermis Leysser), and in winter wheat (Triticum aestivum L.)-fallow fields. Mineralizable C increased from 0.37 g m-2 d-1 in wheat-fallow fields to 0.99 g m-2 d-1 in CRP fields; mineralizable N and coarse particulate C were consistently but not significantly higher in CRP fields. Fine particulate and total soil C and N were not significantly different between CRP and wheat-fallow. Within CRP fields, mineralizable C was significantly higher under grasses than in interspaces (1.96 vs. 0.73 g m-2 d-1, respectively), and mineralizable N and coarse particulate C and N were consistently but not significantly higher under grasses than in interspaces. Soil C and N have increased only slightly after 6 yr of CRP management, and future changes in land use management on these CRP fields, including grazing and cropping, may accrue some small benefits associated with improved soil fertility status.}, author = {Robles, Marcos D. and Burke, Ingrid C.}, citeulike-article-id = {5406390}, citeulike-linkout-0 = {http://soil.scijournals.org/cgi/content/abstract/62/3/725}, day = {1}, journal = {Soil Sci Soc Am J}, keywords = {carbon-storage, grasslands}, month = {May}, number = {3}, pages = {725--730}, posted-at = {2009-08-10 22:39:26}, priority = {2}, title = {Soil Organic Matter Recovery on Conservation Reserve Program Fields in Southeastern Wyoming}, url = {http://soil.scijournals.org/cgi/content/abstract/62/3/725}, volume = {62}, year = {1998} }

TY - JOUR ID - citeulike:5406390 L3 - citeulike-article-id:5406390 N2 - Soil C and N changes following cessation of cultivation in semiarid soils is not well understood. We hypothesized that returning cultivated fields in southeastern Wyoming to perennial grasses through the Conservation Reserve Program (CRP) would (i) increase labile pools of soil organic matter (SOM), and (ii) increase small-scale heterogeneity of SOM. Carbon and N in labile and passive pools of SOM were measured in CRP fields seeded with perennial grasses intermediate wheatgrass (Elytrigia intermedia [Host] Nevski ssp. intermedia), pubescent wheatgrass (Elytrigia intermedia [Schur.] A. Love ssp. barbulata) and smooth brome (Bromus inermis Leysser), and in winter wheat (Triticum aestivum L.)-fallow fields. Mineralizable C increased from 0.37 g m-2 d-1 in wheat-fallow fields to 0.99 g m-2 d-1 in CRP fields; mineralizable N and coarse particulate C were consistently but not significantly higher in CRP fields. Fine particulate and total soil C and N were not significantly different between CRP and wheat-fallow. Within CRP fields, mineralizable C was significantly higher under grasses than in interspaces (1.96 vs. 0.73 g m-2 d-1, respectively), and mineralizable N and coarse particulate C and N were consistently but not significantly higher under grasses than in interspaces. Soil C and N have increased only slightly after 6 yr of CRP management, and future changes in land use management on these CRP fields, including grazing and cropping, may accrue some small benefits associated with improved soil fertility status. IS - 3 JF - Soil Sci Soc Am J EP - 730 TI - Soil Organic Matter Recovery on Conservation Reserve Program Fields in Southeastern Wyoming VL - 62 SP - 725 KW - carbon-storage KW - grasslands AU - Robles, Marcos AU - Burke, Ingrid PY - 1998/05/01/ UR - http://soil.scijournals.org/cgi/content/abstract/62/3/725 ER -