YIELD AND QUALITY RESPONSE OF GREENHOUSE TOMATO TO DIFFERENT MICROPORES GROUP SPACING AND IRRIGATION AMOUNT
M.Z. Zhang1,2,3, W.Q. Niu4,5,6, Z.G. Lu2, Q.J. Bai1*, Y. Li 3, D.L. Wang7, Z.Q. Wang 8 and Z.X. Zhang 9, 10
1Henan Provincial Water Conservancy Research Institute, Zhengzhou 450000, China
2State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi’an University of Technology, Xi’an, Shaanxi, China
3 Northwest Land and Resources Research Center, Shaanxi Normal University, Xi'an, Shaanxi, China
4 Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi, China
5 Institute of Water-saving Agriculture in Arid Areas of China (IWSA), Northwest A&F University, Yangling, Shaanxi, China
6 Institute of Soil and Water Conservation, Chinese Academy of Sciences & Ministry of Water Resources, Yangling, Shaanxi, China
7 School of water conservancy, North China University of Water Resources and Electric Power, Zhengzhou, Henan, China
8 College of environment sciences and engineering, Peking University, Beijing, China
9 Key Laboratory of Vegetation Ecology, Ministry of Education, Institute of Grassland Science, Northeast Normal University, Changchun, Jilin, China
10 State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, Jilin, China
Corresponding Author’s email:bqj0306@163.com
ABSTRACT
The micro-sprinkler irrigation under plastic film (MSPF) uses multiple groups of small micropores under plastic film to evenly distribute water in the root zone soil with the help of gravity and capillary suction, and the appropriate micropores group spacing and irrigation amount can realize the efficient utilization of MSPF. This study clarified the applicability of MSPF in a greenhouse and finding the optimal micropores group spacing and irrigation amount. Treatments were ranged in completely randomised design aimed to determine the effects of different micropores group spacing (L1: 30 cm micropores group spacing, and L2: 50 cm micropores group spacing) and irrigation amount [I1:0.7 Epan; I2:1.0 Epan; and I3:1.2 Epan (Epan is the diameter of 20-cm standard pan evaporation, mm)] of the MSPF on the yield and quality of tomato. The results showed that the MSPF can be used as one of the micro-irrigation methods of greenhouse, which can lead to saving water, increase yield, and improve crop quality. Compared to L2, L1 was better for fruit quality, yield, and water use efficiency (WUE). With increasing irrigation amount, the fruit shape and yield increased, but the fruit flavour, nutrition and WUE decreased. The combination of the 30 cm micropores group spacing and 1.0 Epan is recommended for greenhouse tomato under MSPF in arid and semi-arid sandy loam soil of facility agriculture.
Keywords: Micro-sprinkler irrigation under plastic film; Water use efficiency; Principal Component Analysis; Technique for order preference by similarity to an ideal solution |