Energy balance and partitioning in partial plastic mulched and non-mulched maize fields on the Loess Plateau of China

Energy and water exchange processes between the land surface and atmosphere drive photosynthesis, evapotranspiration, sensible heat flux, energy storage in vegetation, and heating of the soil. Thus, understanding of energy exchange and partitioning is of importance for crop model development and water use efficiency improvement in raifed agro-ecosystems. The present study investigated the energy exchange and partitioning over rainfed maize croplands under two cultivation methods—conventional flat planting without mulching (CK) and a furrow-ridge system with plastic film partially mulching (MFR) for two growing seasons through synchronous measurements of eddy covariance system with multi micro-lysimeters on the eastern Loess Plateau of China, the effects of rainfall on the energy partitioning were also discussed. The results indicated that average energy balance closure were 0.89 and 0.84 for CK and MFR at half-hourly, 0.91 and 0.93 at daily interval, respectively. Each energy flux component presented typical diurnal variations during the entire growing stage, which was a single-peak curve. Latent heat flux (LE) showed typical seasonal variation that it increased during May to June, and reach a high value in July, then decreased gradually. However, compared to LE, sensible heat flux (H) and Bowen ratio showed a similar opposite trends, LE became the main consumer of available energy after maize plants grown quickly. LE of spring maize was the main component of net radiation (Rn), followed by H and soil heat flux (G), which accounted for 64.3%, 28.6%, and −0.2% for CK and 68.5%, 29.7%, and 0.1% for MFR in 2011, 56.8%, 20.1%, and 2.8% for CK and 58.0%, 25.5%, and 8.6% for MFR in 2012, respectively. Transpiration was the main component of LE, which accounted for 54.3%–76.6% of LE for the both treatments. Compared to the energy fluxes before rainfall, LE increased significantly while H and G decreased after rainfall in development stage, however in late stage, the changes in soil water content resulted by rainfall didn’t increase LE significantly for the both treatments due to the high canopy cover and senescent maize plants.

[1]  Natsuko Yoshifuji,et al.  Inter-annual variation in growing season length of a tropical seasonal forest in northern Thailand , 2006 .

[2]  Shaozhong Kang,et al.  Response of vegetative growth and fruit development to regulated deficit irrigation at different growth stages of pear-jujube tree , 2009 .

[3]  Daozhi Gong,et al.  Comparison of multi-level water use efficiency between plastic film partially mulched and non-mulched croplands at eastern Loess Plateau of China , 2017 .

[4]  W. Oechel,et al.  Energy balance closure at FLUXNET sites , 2002 .

[5]  Shaozhong Kang,et al.  Plastic mulch decreases available energy and evapotranspiration and improves yield and water use efficiency in an irrigated maize cropland , 2017 .

[6]  Xueyun Yang,et al.  Effects of tillage and plastic mulch on soil water, growth and yield of spring-sown maize , 2011 .

[7]  Shaozhong Kang,et al.  Evapotranspiration partitioning and variation of sap flow in female and male parents of maize for hybrid seed production in arid region , 2016 .

[8]  Yanhong Tang,et al.  Energy exchange between the atmosphere and a meadow ecosystem on the Qinghai-Tibetan Plateau , 2005 .

[9]  Ling Tong,et al.  Partitioning evapotranspiration into soil evaporation and transpiration using a modified dual crop coefficient model in irrigated maize field with ground-mulching , 2013 .

[10]  Samuel Ortega-Farías,et al.  Partitioning of net radiation and evapotranspiration over a superintensive drip-irrigated olive orchard , 2015, Irrigation Science.

[11]  Yu Feng,et al.  Estimation of maize evapotranspiration using extreme learning machine and generalized regression neural network on the China Loess Plateau , 2017 .

[12]  Rong-Ping Li,et al.  Effects on soil temperature, moisture, and maize yield of cultivation with ridge and furrow mulching in the rainfed area of the Loess Plateau, China , 2013 .

[13]  L. Jarlan,et al.  Combining stable isotopes, Eddy Covariance system and meteorological measurements for partitioning evapotranspiration, of winter wheat, into soil evaporation and plant transpiration in a semi-arid region , 2016 .

[14]  F. Tian,et al.  Energy balance and canopy conductance for a cotton field under film mulched drip irrigation in an arid region of northwestern China , 2017 .

[15]  A. Verhoef,et al.  Determination of turbulent heat fluxes using a large aperture scintillometer over undulating mixed agricultural terrain , 2012 .

[16]  Roger A. Pielke,et al.  Interactions between the atmosphere and terrestrial ecosystems: influence on weather and climate , 1998 .

[17]  W. Oechel,et al.  Energy partitioning between latent and sensible heat flux during the warm season at FLUXNET sites , 2002 .

[18]  Dawen Yang,et al.  Interannual and seasonal variability in evapotranspiration and energy partitioning over an irrigated cropland in the North China Plain , 2010 .

[19]  Yanjun Shen,et al.  Characteristics of the water-energy-carbon fluxes of irrigated pear (Pyrus bretschneideri Rehd) orchards in the North China Plain , 2013 .

[20]  Wenzhao Liu,et al.  Spatiotemporal characteristics of reference evapotranspiration during 1961-2009 and its projected changes during 2011-2099 on the Loess Plateau of China , 2012 .

[21]  Natsuko Yoshifuji,et al.  A review of evapotranspiration estimates from tropical forests in Thailand and adjacent regions , 2008 .

[22]  Qi Wang,et al.  Optimum ridge–furrow ratio and suitable ridge-mulching material for Alfalfa production in rainwater harvesting in semi-arid regions of China , 2015 .

[23]  Daozhi Gong,et al.  Comparison of ET partitioning and crop coefficients between partial plastic mulched and non-mulched maize fields , 2017 .

[24]  Dennis D. Baldocchi,et al.  Climate and vegetation controls on boreal zone energy exchange , 2000, Global change biology.

[25]  Emilio A. Laca,et al.  Effects of different eddy covariance correction schemes on energy balance closure and comparisons with the modified Bowen ratio system , 2008 .

[26]  D. Baldocchi.  Assessing the eddy covariance technique for evaluating carbon dioxide exchange rates of ecosystems: past, present and future , 2003 .

[27]  Jianhua Zhang,et al.  Control of Stomatal Behaviour by Abscisic Acid which Apparently Originates in the Roots , 1987 .

[28]  Lixin Wang,et al.  Multiple Methods to Partition Evapotranspiration in a Maize Field , 2017 .

[29]  Liwang Ma,et al.  Modeling evapotranspiration and energy balance in a wheat-maize cropping system using the revised RZ-SHAW model , 2014 .

[30]  Jia Yue,et al.  Calibration of Hargreaves model for reference evapotranspiration estimation in Sichuan basin of southwest China , 2017 .

[31]  K. Siddique,et al.  Ridge-Furrow Mulching Systems—An Innovative Technique for Boosting Crop Productivity in Semiarid Rain-Fed Environments , 2013 .

[32]  B. Scanlon,et al.  Energy/water budgets and productivity of the typical croplands irrigated with groundwater and surface water in the North China Plain , 2013 .

[33]  Zhenchao Li,et al.  Seasonal and interannual variation of radiation and energy fluxes over a rain-fed cropland in the semi-arid area of Loess Plateau, northwestern China , 2016 .

[34]  Shaozhong Kang,et al.  Estimation of evapotranspiration and its components from an apple orchard in northwest China using sap flow and water balance methods , 2007 .

[35]  Ling Tong,et al.  Comparison of dual crop coefficient method and Shuttleworth–Wallace model in evapotranspiration partitioning in a vineyard of northwest China , 2015 .

[36]  Takashi Hirano,et al.  Comparisons of energy balance and evapotranspiration between flooded and aerobic rice fields in the Philippines , 2011 .

[37]  I. Pérez,et al.  Energy balance and partitioning over a rotating rapeseed crop , 2015 .

[38]  M. Mccabe,et al.  A comparison of optical and microwave scintillometers with eddy covariance derived surface heat fluxes , 2015 .

[39]  Lu Zhang,et al.  Evapotranspiration and crop coefficient of spring maize with plastic mulch using eddy covariance in northwest China , 2008 .

[40]  S. Qin,et al.  Effect of ridge–furrow and plastic-mulching planting patterns on yield formation and water movement of potato in a semi-arid area , 2014 .

[41]  Yongyong Zhang,et al.  Energy exchange and evapotranspiration over irrigated seed maize agroecosystems in a desert-oasis region, northwest China , 2016 .

[42]  Wei Wu,et al.  Towards the highly effective use of precipitation by ridge-furrow with plastic film mulching instead of relying on irrigation resources in a dry semi-humid area , 2016 .

[43]  T. Ohta,et al.  Energy balance and its closure over a young larch forest in eastern Siberia , 2008 .

[44]  L. S. Pereira,et al.  Evapotranspiration information reporting: I. Factors governing measurement accuracy , 2011 .

[45]  S. Verma,et al.  Interannual water vapor and energy exchange in an irrigated maize-based agroecosystem , 2008 .

[46]  Shaozhong Kang,et al.  Deficit irrigation and sustainable water-resource strategies in agriculture for China's food security. , 2015, Journal of experimental botany.

[47]  Daozhi Gong,et al.  Warmer and Wetter Soil Stimulates Assimilation More than Respiration in Rainfed Agricultural Ecosystem on the China Loess Plateau: The Role of Partial Plastic Film Mulching Tillage , 2015, PloS one.

[48]  Guofu Yuan,et al.  Energy and water exchanges over a riparian Tamarix spp. stand in the lower Tarim River basin under a hyper-arid climate , 2014 .

[49]  Fusheng Li,et al.  Multi-scale evapotranspiration of summer maize and the controlling meteorological factors in north China , 2016 .

[50]  M. G. Ryan,et al.  Magnitudes and seasonal patterns of energy, water, and carbon exchanges at a boreal young jack pine forest in the BOREAS northern study area , 1997 .

[51]  Yu Feng,et al.  Comparison of ELM, GANN, WNN and empirical models for estimating reference evapotranspiration in humid region of Southwest China , 2016 .

[52]  T. Sauer,et al.  Energy and evapotranspiration partitioning in a desert vineyard , 2016 .

[53]  Shasha Luo,et al.  The effects of mulching on maize growth, yield and water use in a semi-arid region , 2013 .

[54]  C. Boast,et al.  A ``Micro-Lysimeter'' Method for Determining Evaporation from Bare Soil: Description and Laboratory Evaluation1 , 1982 .

[55]  A. Miyata,et al.  CO2/heat fluxes in rice fields: Comparative assessment of flooded and non-flooded fields in the Philippines , 2009 .

[56]  S. Malhi,et al.  Effects of gravel–sand mulch, plastic mulch and ridge and furrow rainfall harvesting system combinations on water use efficiency, soil temperature and watermelon yield in a semi-arid Loess Plateau of northwestern China , 2011 .

[57]  Shaozhong Kang,et al.  Crop coefficient and ratio of transpiration to evapotranspiration of winter wheat and maize in a semi-humid region , 2003 .