| Autor: |
Lunga, D. Della, Brye, K. R., Henry, C. G., Humphreys, J. J. |
| Předmět: |
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| Zdroj: |
B.R. Wells Rice Research Studies - Arkansas Agricultural Experiment Station, University of Arkansas System; Aug2019, Issue 659, p260-268, 9p |
| Abstrakt: |
Tillage practice and irrigation regime influence greenhouse gas (GHG) emissions in rice (Oryza sativa L.) production. The objective of this study was to evaluate the effects of tillage, field position, and chamber presence on soil water content, aboveground biomass, and yield in the furrow-irrigated rice production system in eastern Arkansas. Research was conducted during 2018 using the RiceTec hybrid rice cultivar RT 7311 CL at the University of Arkansas System Division of Agriculture's Rice Research and Extension Center near Stuttgart, Arkansas on a DeWitt silt loam (Albaqualf). Eighteen, 12-in.-diameter base collars were installed on top of the beds. On 10 different dates, soil volumetric water content (VWC) was recorded inside and outside the base collars as well as aboveground dry matter and yield at the end of the season. On 6 of 10 weekly sampling, the difference in VWC inside and outside the base collars did not differ (P > 0.05) from zero for any of the 6 tillage-field position combinations. In only 8% of the total measurements, VWC differed between inside and outside the base collars. There was no difference between inside and outside the base collars in 4 of 6 tillage-site position combinations for aboveground dry matter and in 3 of 6 tillage-site position combinations for rice yield. The results of this study demonstrated that the presence of base collars did not have a substantial effect on soil moisture content, aboveground dry matter, and yield, strengthening the validity and reliability of the closed-chamber method for GHG analyses in rice production. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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