Impact of planting date on CO2 fluxes, evapotranspiration and water-use efficiency in peanut using the eddy-covariance technique

被引:4
|
作者
Zhang, G. [1 ]
Leclerc, M. Y. [1 ]
Singh, N. [1 ,2 ]
Tubbs, R. S. [3 ]
Monfort, W. S. [3 ]
机构
[1] Univ Georgia, Dept Crop & Soil Sci, Atmospher Biogeosci Grp, Griffin Campus 1109 Expt St, Griffin, GA 30223 USA
[2] Univ Florida, West Florida Res & Educ Ctr, 4253 Expt Dr, Jay, FL 32565 USA
[3] Univ Georgia, Dept Crop & Soil Sci, Tifton Campus,2360 Rainwater Rd, Tifton, GA 31793 USA
关键词
Water -use efficiency; Yield; Peanut; Planting date; CO 2 flux and evapotranspiration; TOMATO SPOTTED WILT; CARBON-ISOTOPE DISCRIMINATION; SEEDLING EMERGENCE; SOIL-TEMPERATURE; FOOTPRINT MODEL; VAPOR EXCHANGE; SEEDING RATE; LEAF-AREA; YIELD; MANAGEMENT;
D O I
10.1016/j.agrformet.2022.109163
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
The combination of increased climate variability with changing weather patterns heightens the importance of the role of planting date on water use in peanut production. Experiments addressing different peanut planting dates were conducted over three years and daytime ecosystem water-use efficiency was determined using the eddy-covaraince method. Results suggest that during the early growing stage in all three planting dates, a late planting date presented by far the highest CO2 fluxes and daytime ecosystem water-use efficiency. Of immediate significance, the latest planting date was also found to exhibit the highest yield in two of the three years in the experiment. Furthermore, an examination of the last 20 years (2001-2020) of climatological records suggests that a late planting date carries a risk of 40% chance of sub-optimal low temperatures in early fall, potentially reducing the yield in those years. In addition, the late planting date carries 15% probability of ten or more consecutive rainy days in the narrow harvest window, potentially impacting a timely harvest.
引用
收藏
页数:16
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