Development of smart irrigation systems based on real-time soil moisture data in a greenhouse: Proof of concept

被引：53
|
作者：
Liao, Renkuan [2 ]
Zhang, Shirui [1 ,3 ]
Zhang, Xin [1 ,3 ]
Wang, Mingfei [1 ,3 ]
Wu, Huarui [1 ,3 ]
Zhangzhong, Lili [1 ,3 ]
机构：
[1] Beijing Acad Agr & Forestry Sci, Natl Engn Res Ctr Informat Technol Agr, Beijing 100097, Peoples R China
[2] Cornell Univ, Dept Biol & Environm Engn, Ithaca, NY 14853 USA
[3] Minist Agr & Rural Affairs, Key Lab Qual Testing Software & Hardware Prod Agr, Beijing 100097, Peoples R China
来源：
AGRICULTURAL WATER MANAGEMENT | 2021年 / 245卷 / 245期
关键词：
Water-saving irrigation; Automatic irrigation; Water uptake; Greenhouse; Tomato; Remote control; WATER-USE EFFICIENCY; ROOT-ZONE IRRIGATION; DEFICIT IRRIGATION; PHYSIOLOGICAL-RESPONSES; DRIP IRRIGATION; CLIMATE-CHANGE; FRUIT-QUALITY; NITROGEN RATE; YIELD; CROP;
D O I：
10.1016/j.agwat.2020.106632
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
A reasonable estimation of crop water uptake depth (WUD) provides vital prerequisites for determining scientific irrigation scheduling. However, real-time acquisition of crop WUD to guide irrigation has not been reported. In the current study, a smart irrigation system based on real-time soil moisture data was developed, in which the dynamic crop WUD was estimated using the spatiotemporal characteristics of soil moisture distributions. Subsequently, the data of crop WUD were acquired using a central irrigation controller to achieve a precise irrigation depth at each irrigation event. A drip irrigation experiment for tomato (Lycopersicum esculentum) planting was conducted in a greenhouse in northern China. Wireless soil moisture sensors were installed to collect real-time soil moisture data from a 0-100 cm soil profile. Soil moisture exhibited a ladder trend for 0-60 cm and a stable trend for 60-100 cm. A regression equation (WUDi = 0.0119d(2) + 1.9387d.6.5795, R-2 = 0.89) quantifying the dynamic depth of crop water uptake was successfully obtained based on the characteristics of soil moisture distribution, and a water-saving scheme (i.e., irrigation to real-time crop WUD) was determined to guide every irrigation event via a remote automatic irrigation system. Tomato evapotranspiration (ET) calculated using soil moisture data was consistent with that calculated using indoor meteorological data, confirming the reliability of real-time soil moisture data for estimating the tomato WUD. The tomato irrigation water use efficiency (IWUE) of the established system reached 41.23 kg/m(3), which was an evident improvement compared with that obtained using a traditional irrigation scheme (31.58 kg/m(3)). In addition, the IWUE of tomato in the established system was almost approached that of the previously published results. The findings of this study highlight the importance of reasonable water-saving irrigation scheduling and provide insights into the development of an efficient and automatic irrigation system.
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页数：9
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