HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Related articles in Crop Science Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (21) Citing Articles via Google Scholar Google Scholar Articles by Frank, A. B. Articles by Johnson, H. A. Search for Related Content PubMed Articles by Frank, A. B. Articles by Johnson, H. A. Agricola Articles by Frank, A. B. Articles by Johnson, H. A. Related Collections Crop Growth and Development Carbon Sequestration Biofuels

Biomass and Carbon Partitioning in Switchgrass

USDA-ARS, Box 459, Hwy 6 S., Mandan, ND 58554

View larger version (22K): [in a new window]   Fig. 1. Changes in biomass of leaves, stems, senesced leaves and stems, litter, and total biomass for Dacotah and Sunburst switchgrass on eight sample dates averaged over 2000, 2001, and 2002. Some tests for significance are presented in Table 1.

View larger version (23K): [in a new window]   Fig. 2. Changes in C content in leaves, stems, senesced leaves and stems, litter, and total biomass for Dacotah and Sunburst switchgrass on eight sample dates averaged over 2000, 2001, and 2002. Some tests for significance are presented in Table 2.

View larger version (19K): [in a new window]   Fig. 3. Root biomass in increments to 1.1-m depth for Dacotah and Sunburst switch sampled in 2000, 2001, and 2002. Data for increments 0.3 to 0.6 m, 0.6 to 0.9 m, and 0.9 to 1.1 m were partitioned into 0.1 m increments to better illustrate trends in root biomass with soil depth. Horizontal bars are standard errors of the mean.

View larger version (20K): [in a new window]   Fig. 4. Soil CO2 flux for Dacotah and Sunburst switchgrass on 10 dates in 2000, nine dates in 2001, and 11 dates in 2002. Measurements were made from early May to late October as indicated by the first letter of the month above the x axis. Vertical bars are standard errors of the mean.

View larger version (12K): [in a new window]   Fig. 5. Total soil organic carbon content to 0.9-m soil depth for switchgrass in 2000, 2001, and 2002. The F-test evaluated by SAS PROC MIXED model was significant for years at the 0.05 level, but nonsignificant for cultivars and cultivars x years.