Deficit Irrigation of Subsurface Drip-Irrigated Grape Tomato

Abstract

Agriculture is one of the segments that most uses water and developments have been made to save irrigation water. Deficit irrigation is a technique that can contribute to production and water saving in agriculture. This study aimed to evaluate the viability of deficit irrigation in tomato production irrigated by subsurface drip in a greenhouse and estimate water saving. The experiment was conducted at the CCA/UFSCar, in Araras, São Paulo, Brazil, with grape tomato cultivation. It consisted of three treatments, 100 % water depth and deficit irrigation (75 and 50 % of water depth), with a randomized block design. Irrigation management was performed using mean soil moisture data collected through TDR probes installed in each treatment. Tomato plants were cultivated for 137 days and conducted vertically with one stem and six bunches. Fruit size, number and mass of fruits per plant, fruit pH and soluble solids were attributes measured and analyzed weekly. The deficit irrigation of 50 % treatment presented lower values in all attributes evaluated and 90.6 % of water saving. The 75 % treatment showed lower value only for pH and fruit diameter and 70.4 % of water saving. Deficit irrigation of 75 % was viable for tomato cultivation in greenhouse and for water saving in crop cycle.

Modeling and simulation of trifluralin herbicide movement due to its application on soils by chemigation

“…The Trifluralin (α,α,α-trifluoro-2−6-dinitro−NN-dipropylp-toluidine), TFN, is an herbicide of the chemical group Dinitroaniline, widely used in agriculture since 1960 (Coleman et al, 2020;Epp et al, 2018). This pre-emergent herbicide is efficiently used to control grasses and some smallseeded dicotyledonous species (Coleman et al, 2020;Li et al, 2021) and is also capable of minimizing root intrusion in subsurface drippers (Lima, 2011;Mendonça et al, 2020). At a global scale, it is estimated that around 4,400 tons of TFN are currently used per year, mainly for the cultivation of cotton, alfalfa, and soybeans (Maggi et al, 2019).…”

Evaluation of Suitable Mixture of Water and Air for Processing Tomato in Drip Irrigation in Xinjiang Oasis

“…The annual precipitation of Xinjiang is 147 mm, and the annual average evaporation is as high as 1500-2300 mm [2,3]. Water resources in this area are exceedingly scarce, and the sustainable development of agriculture in this area depends on irrigation [4,5]. Therefore, appropriate irrigation strategies should be adopted to save irrigation water, maintain relative yield and improve water use efficiency [6,7], and it is urgent to realize the effective use of water resources [8].…”