| Effects of plastic film mulching on soil temperature and evapotranspiration characteristics of jujube under drip irrigation |
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| DOI：10.7606/j.issn.1000-7601.2021.01.04 |
| Key Words: jujube plastic mulching soil temperature evapotranspiration intensity lysimeter |
| Author Name | Affiliation | | MA Liang | School of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | GUO Dandan | School of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | LEI Qingyuan | School of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | LIU Feng | School of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China |
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| Abstract: |
| A large\|scale weighing lysimeter was used to accurately measure the intraday and daily variation trend of jujube's evapotranspiration intensity under plastic film mulching and without plastic film mulching, and the soil temperature in 0~100 cm soil layer was continuously monitored by the intelligent soil moisture sensor. The effects of plastic film mulching on soil temperature and evapotranspiration intensity in jujube garden were studied.Results show that the soil temperature amplitude decreases gradually with the increase of soil depth, plastic film mulching increased the daily variation of soil temperature in 0~40 cm soil layer, and increased the soil temperature by 0.89℃ compared with that in 0~10 cm soil layer at the germination stage of jujube without mulching,evapotranspiration decreased by 41.72 mm,mulching with plastic film was only 50.5% of the emission of without mulching treatment,indicating that the heat preservation and water\|saving effect of mulching film was significant in the early growth stage of Jujube trees.The intraday emission intensity of jujube trees covered with plastic film and without mulching showed a single peak trend, and the intraday emission intensity reached the maximum value of 5.36 mm·d-1 and 4.08 mm·d-1 at young fruit stage, respectively. The difference between germination and flowering was 1.33 mm·d-1 and 1.54 mm·d-1, respectively, which indicated that mulching could effectively reduce the evaporation of jujube trees in the early growth stage.The daily evapotranspiration of jujube during the whole growth period increased firstly and then decreased. The total evapotranspiration of jujube under without mulching and plastic film mulching were 724.74 mm and 517.44 mm, respectively. The water saving of plastic film mulching was 207.30 mm, and the difference of evapotranspiration at flowering stage was the largest, reaching 87.39 mm.The total water consumption at flowering stage and fruit development stage of jujube with without mulching and plastic film mulching accounted for 69.14% and 70.83% of the totalevapotranspiration during the whole growth period, respectively.The crop coefficient of jujube without mulching was higher than that of plastic film mulching at each growth stage, the difference was 0.19~0.40, and the difference was 0.40 and 0.35 at germination and flowering stage, respectively. |
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