Carbon uptake and water productivity for dry-seeded rice and hybrid maize grown with overhead sprinkler irrigation

Alberto, Ma. Carmelita R.; Buresh, R. J.; Hirano, Takashi; Miyata, Akira; Waßmann, Reiner; Quilty, James R.; Correa, Teodoro Q.; Sandro, Joseph M.

doi:10.1016/j.fcr.2013.03.006

Cited by 36 publications

(18 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After data filtering, which also included malfunctioning periods, total LE data gaps accounted for 30.1% and 29.15%, for PRS and CAS sites, respectively. These percentages of gaps were similar to those found in others studies conducted in rice paddies [37,45,46]. Gap filling for H and LE missing data was performed through the REddyProc package available in RStudio software, using the following entry data: LE, H, air temperature (Temp), global radiation (R g ).…”

Section: Et Experimental Data Processingsupporting

confidence: 82%

Evaluation of MOD16 Algorithm over Irrigated Rice Paddy Using Flux Tower Measurements in Southern Brazil

Souza

Roberti

Ruhoff

et al. 2019

Water

View full text Add to dashboard Cite

Evapotranspiration (ET) is an important component of the hydrological cycle. Understanding the ET process has become of fundamental importance given the scenario of global change and increasing water use, especially in the agricultural sector. Determining ET over large agricultural areas is a limiting factor due to observational data availability. In this regard, remote sensing data has been used to estimate ET. In this study, we evaluated the Moderate-Resolution Imaging Spectroradiometer (MODIS) land surface ET product estimates (hereafter MOD16 ET -MODIS Global Terrestrial Evapotranspiration Product) over two rice paddy areas in Southern Brazil, through the ET measured using the eddy covariance technique (hereafter EC). The energy balance components were evaluated during fallow and flooded seasons showing latent heat flux dominates in both seasons. The results showed that MOD16 ET underestimated EC measurements. Overall, the RMSE (root mean square error) ranged between 13.40 and 16.35 mm 8-day −1 and percent bias (PBIAS) ranged between −33.7% and −38.7%. We also assessed the ET (measured and estimated) main drivers, with EC yielding higher correlation against observed net radiation (R n ) and global radiation (R g ), followed by air temperature (Temp) and vapor pressure deficit (VPD), whilst MOD16 ET estimates yielded higher correlation against leaf area index (LAI) and fraction of photosynthetically active radiation (f PAR). The MOD16 algorithm was forced with meteorological measurements but the results did not improve as expected, suggesting a low sensitivity to meteorological inputs. Our results indicated when a water layer was present over the soil surface without vegetation (LAI around zero), the largest differences between EC measurements and MOD16 ET were found. In this period, the expected domain of soil evaporation was not observed in MOD16 ET physical processes partition, indicating the algorithm was not able to detect areas with high soil moisture. In general, the MOD16 ET product presented low accuracy when compared against experimental measurements over flooded rice paddy, suggesting more studies are necessary, in order to reduce uncertainties associated to the land cover conditions.

show abstract

Section: Et Experimental Data Processingsupporting

confidence: 82%

Evaluation of MOD16 Algorithm over Irrigated Rice Paddy Using Flux Tower Measurements in Southern Brazil

Souza

Roberti

Ruhoff

et al. 2019

Water

View full text Add to dashboard Cite

show abstract

“…The EI platform consists of two fields, blocks UJ and UE, irrigated with centre pivot overhead sprinkler systems, 103-m in length, covering a total of 3.33 ha in each 4-ha field. The soils in these fields are Lithic Haplustept (Soil Survey Staff, 2010), which overlay a porous volcanic tuff at depths varying from 0.3 to 1.2 m (Alberto et al, 2013). The soil profile to a depth of 0.3 m in these fields has an average clay content of 37% and a pH (1:5 water) of 6.3, while the average organic carbon concentration in the top 0 to 0.15 m is 1.1%.…”

Section: Ecological Intensification Fieldsmentioning

confidence: 99%

Energy efficiency of rice production in farmers’ fields and intensively cropped research fields in the Philippines

Quilty

McKinley

Pede

et al. 2014

Field Crops Research

Self Cite

View full text Add to dashboard Cite

“…Rice (Oryza sativa L.) is the most important crop in tropical Asia. However, the increasing scarcity of water could lead to changes in production systems, which use less water (for e.g., dry-seeded rice) or more crop diversification [1]. Corn (Zea mays L.) is one such crop which is more water efficient than rice and produces high yield.…”

Section: Introductionmentioning

confidence: 99%

Effect of Plant Geometry on Growth and Yield of Corn in the Rice-Corn Cropping System

Chauhan¹,

Opeña²

2013

AJPS

View full text Add to dashboard Cite

The rice-corn cropping system is increasing in Asia in response to increased demand of corn for feed. A field study was conducted to evaluate the effect of plant geometry (row and plant to plant spacing: 50 × 20, 50 × 30, 75 × 20, and 75 × 30 cm) on growth and yield of corn. Plant height and leaf production per plant were not influenced by the plant geometry. Spacing, however, influenced leaf area, aboveground shoot biomass, and yield of corn per unit area. Highest leaf area, shoot biomass, and yield (8.2 t·ha −1 ) were produced by plants grown at 50 × 20 cm spacing. The results of this study suggest that narrow rows and plant to plant spacing may increase grain yield by increasing crop growth rates. Plant geometry could be modified to improve yield of corn in the rice-corn cropping system, and thereby increase productivity of the system.

show abstract

Carbon uptake and water productivity for dry-seeded rice and hybrid maize grown with overhead sprinkler irrigation

Cited by 36 publications

References 58 publications

Evaluation of MOD16 Algorithm over Irrigated Rice Paddy Using Flux Tower Measurements in Southern Brazil

Evaluation of MOD16 Algorithm over Irrigated Rice Paddy Using Flux Tower Measurements in Southern Brazil

Energy efficiency of rice production in farmers’ fields and intensively cropped research fields in the Philippines

Effect of Plant Geometry on Growth and Yield of Corn in the Rice-Corn Cropping System

Contact Info

Product

Resources

About