Improvement of Quality and Yield of Greenhouse Tomato (Solanum Lycopersicum L.) Plants by Micro-Sprinkler Irrigation Under Plastic Film

Effects of Micropore Group Spacing and Irrigation Amount on Soil Respiration and Yield of Tomato with Microsprinkler Irrigation under Plastic Film in Greenhouse

“…As one of the main microirrigation methods in facility agriculture, microsprinkler irrigation under plastic film (MSPF, see Figure 1; Figure 1 is reproduced from Zhang et al [9]) is used to irrigate tomato with multiple groups of small holes under the plastic film [10]. The MSPF has obtained good application effects in the facility agriculture tomato irrigation.…”

“…Through greenhouse experiment and regression analysis, this paper is aimed at enriching the greenhouse tomato microirrigation technology system and providing data support for water saving and high yield of protected agricultural crops and soil carbon cycle in this area. The greenhouse is 85 m long and 15 m wide (see Figure 2; Figure 2 is reproduced from Zhang et al [9]). The average annual temperature is 13.3°C, and the rainfall is about 613.75 mm.…”

“…The soil type is sandy loam in this area, and the mass fractions of sand, silt, and clay are 63.9%, 29.63%, and 6.47%, respectively. The average bulk density of a 1.0 m soil layer is 1.48 g/cm 3 , the field capacity is 27.40%, and the buried depth of the groundwater table is more than 30 m [9]. The content of organic matter, namely, total phosphorus (P), total potassium (K), total nitrogen, available nitrogen, available phosphorus, and available potassium, in the plough layer before sowing was 15.53 g/kg, 10.12 g/kg, 2.01 g/kg, 1.36 g/kg, 0.70 g/kg, 0.11 g/kg, and 0.08 g/kg, respectively.…”

“…The content of organic matter, namely, total phosphorus (P), total potassium (K), total nitrogen, available nitrogen, available phosphorus, and available potassium, in the plough layer before sowing was 15.53 g/kg, 10.12 g/kg, 2.01 g/kg, 1.36 g/kg, 0.70 g/kg, 0.11 g/kg, and 0.08 g/kg, respectively. The irrigation water originated from groundwater, the pH of which was 6.8, the chemical oxygen demand (COD) was 53.2 mg/L, the anionic surfactant content was 3.2 mg/L, and the chloride content was 0.48 mg/L [9]. The Jingfan 401 of tomato (Jingyan Yinong seed Technology Co., Ltd., Beijing) is planted on a ridge, in which the ridge is 3.4 m long and 1.2 m wide, and the irrigated plot is shown in Figure 2.…”

“…The distance between each plot is 4 m, and a layer of styrene-butadiene-styrene block copolymer building waterproof film with a depth of 1.0 m is embedded in the middle to prevent the horizontal infiltration and movement of soil moisture and avoid the influence on other plot tests. The pipe of MSPF (Hebei Plentirain Irrigation Equipment Technology Co., Ltd., Hebei, China) adopted thin-walled oblique 3 micropores; the pipe of MSPF structure parameters is shown in Figure 3 (Figure 3 is reproduced from Zhang et al [9]) and Table 1. The control drip irrigation under plastic film (CK1, Hebei Plentirain Irrigation Equipment Technology Co., Ltd., Hebei, China) with a thin-wall labyrinth tooth channel was selected.…”