| College of Water Conservancy, Shenyang Agricultural University,Shenyang, Liaoning 110866, China |
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| DOI：10.7606/j.issn.1000-7601.2020.04.25 |
| Key Words: water and heat fluxes greenhouse grapevine meteorological factors |
| Author Name | Affiliation | | ZHENG Siyu | College of Water Conservancy, Shenyang Agricultural University,Shenyang, Liaoning 110866, China | | WANG Tieliang | College of Water Conservancy, Shenyang Agricultural University,Shenyang, Liaoning 110866, China | | WEI Xinguang | College of Water Conservancy, Shenyang Agricultural University,Shenyang, Liaoning 110866, China | | LI Bo | College of Water Conservancy, Shenyang Agricultural University,Shenyang, Liaoning 110866, China | | SUN Jun | College of Water Conservancy, Shenyang Agricultural University,Shenyang, Liaoning 110866, China | | GE Dong | College of Water Conservancy, Shenyang Agricultural University,Shenyang, Liaoning 110866, China | | FU Shining | College of Water Conservancy, Shenyang Agricultural University,Shenyang, Liaoning 110866, China |
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| Abstract: |
| Using the observation data of water and heat balance of greenhouse grapes to analyze the energy balance, daily variation of energy components and growth period, distribution of energy on solar greenhouse grapevine in the Northeastern China, and also analyzed the response of latent heat flux (λET) to environmental factors. The results showed that the daily changes of water and heat flux components, which were a single peak trend throughout the growth period.The peak value of net radiation (Rn) was 618.75 W·m-2, λET was 242.73 W·m-2, and the sensible heat flux (H) was 327.93 W·m-2. During the growth period of the new shoots, λET was smaller during the daylight with 34.55 W·m-2. With the difference of growth period, λET, gradually increased, and decreased after reaching the maximum value of 78.49 W·m-2 during fruit coloring and ripening period. The H<、i> value accounted for the majority during the entire growth period. The ratio of latent heat flux to net radiation during the day (λET/Rn) was the smallest in the shoot growth period with 25.28%, and the maximum value was 44.17% at the largest in the fruit coloration and ripening period. The H value accounted for more than 50% of the net radiation ratio (H/Rn) throughout the growing period, and the soil heat flux accounted for the relatively small of net radiation ratio (G/Rn), with a variation range of 4.46~12.32 W·m-2. The energy ratio in the whole growth period was H/Rn>λET/Rn> G/Rn. At the instantaneous scale of different growth stages, The Rn was the most important meteorological factor that affected latent heat changes, with R2 as high as 0.88. On daily scale, the influence of meteorological factors on latent heat flux was gradually weakening, and the correlation coefficient between RH and λET flux was only 0.28. But regardless of the instantaneous scale or the daily scale, Rn was still the most important meteorological factor affecting λET. The influence of meteorological factors on λET ranged as Rn> VPD> Ta> RH. |
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