scholarly journals Partial root drying irrigation technique: Practical application of drought stress signaling mechanism in plants

2009 ◽  
Vol 61 (2) ◽  
pp. 285-288 ◽  
Author(s):  
Sladjana Savic ◽  
Radmila Stikic ◽  
Zorica Jovanovic ◽  
Ljiljana Prokic ◽  
Milena Paukovic
Keyword(s):  
Root Zone ◽  
Water Status ◽  
Practical Application ◽  
Signaling Mechanism ◽  
Tomato Yield ◽  
Novel Approach ◽  
Use Efficiency ◽  
Tomato Growth ◽  
Partial Root Drying ◽  
Partial Root Drying Irrigation

Partial root-zone drying (PRD) technique, a novel approach to watering crops, was developed on the basis of knowledge of root-to-shoot signaling in drying soil. The aim of the present paper was to investigate the effects of the PRD treatment on tomato growth and the water regime. The obtained PRD results showed significant reduction in shoot but not fruit growth in the absence of any changes in shoot water status, indicating the involvement of chemical root-to-shoot signals. Higher water use efficiency (WUE) results mean that the PRD technique can be used to reduce irrigation water without significant reduction of tomato yield.

scholarly journals Alternate partial root-zone drying irrigation improves fruit quality in tomatoes

2014 ◽  
Vol 41 (No. 4) ◽  
pp. 185-191 ◽  
Author(s):  
Y. Sun ◽  
P.E. Holm ◽  
F. Liu
Keyword(s):  
Fruit Quality ◽  
Management Strategy ◽  
Root Zone ◽  
Simultaneous Increase ◽  
Solanum Lycopersicum L ◽  
Tomato Yield ◽  
Soluble Solid ◽  
Use Efficiency ◽  
Better Than

 Alternate partial root-zone drying (PRD) irrigation and deficit irrigation (DI) are water-saving irrigation strategies. Here, comparative effects of PRD and DI on fruit quality of tomato (Solanum lycopersicum L.) were investigated. The results showed that the irrigation treatments had no effect on tomato yield but significantly affected several organic and mineral quality attributes of the fruits. Compared to DI, PRD significantly increased the fruit concentrations of Ca and Mg, and fruit juice concentrations of total soluble solid, glucose, fructose, citric and malic acid, P, K and Mg. It is concluded that PRD is better than DI in terms of improving fruit quality, and could be a promising management strategy for simultaneous increase of water use efficiency and fruit quality in tomatoes.

scholarly journals Irrigation Protocols in Different Water Availability Scenarios for ‘Crimson Seedless’ Table Grapes under Mediterranean Semi-Arid Conditions

Water ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 22
Author(s):  
Abdelmalek Temnani ◽  
María R. Conesa ◽  
Manuel Ruiz ◽  
Juan A. López ◽  
Pablo Berríos ◽  
...  
Keyword(s):  
Deficit Irrigation ◽  
Root Zone ◽  
Maximum Temperature ◽  
Stem Water Potential ◽  
Regulated Deficit Irrigation ◽  
Table Grapes ◽  
Use Efficiency ◽  
Partial Root Drying ◽  
Gaussian Regression ◽  
Sustainable Irrigation

For three consecutive years (2015–2017), two deficit irrigation (DI) strategies were used in a 12-year old vineyard (cv. ‘Crimson Seedless’) to implement a sustainable irrigation protocol according to the available water for the farmer. Four different irrigation treatments were assessed: (i) Control (CTL), irrigated to satisfy the maximum crop water requirements throughout the entire growing season; two DI treatments irrigated as CTL except during post-veraison, when the vines were irrigated at 50% CTL: (ii) Regulated Deficit Irrigation (RDI); and (iii) Partial Root Drying (PRD), alternating the wet and dry sides of the root zone, and (iv) irrigated according to the criteria followed by the farmer (FARM), and conditioned by the availability of water each season. The DI strategies resulted in a 50% increase in water use efficiency in the first two years and 81% during the third year. Weekly deficit irrigation protocols are proposed, which specify a maximum difference of 0.22 MPa of midday stem water potential with respect to well-watered vines for a range of irrigation water availabilities between 4000 and 7000 m3 ha−1. An applied water prediction model based on the Gaussian regression using day of the year and maximum temperature of the day is also proposed.

scholarly journals Alternate Partial Root-Zone Drip Nitrogen Fertigation Reduces Residual Nitrate Loss While Improving the Water Use but Not Nitrogen Use Efficiency

2021 ◽  
Vol 12 ◽  
Author(s):  
Rui Liu ◽  
Peng-Fei Zhu ◽  
Yao-Sheng Wang ◽  
Zhen Chen ◽  
Ji-Rong Zhu ◽  
...  
Keyword(s):  
Water Use ◽  
Irrigation Water ◽  
Soil Profile ◽  
Root Zone ◽  
Soil Column ◽  
Tomato Yield ◽  
N Supply ◽  
Use Efficiency ◽  
Residual Nitrate ◽  
N Use

The efficient utilization of irrigation water and nitrogen is of great importance for sustainable agricultural production. Alternate partial root-zone drip irrigation (APRD) is an innovative water-saving drip irrigation technology. However, the coupling effects of water and nitrogen (N) supply under APRD on crop growth, water and N use efficiency, as well as the utilization and fate of residual nitrates accumulated in the soil profile are not clear. A simulated soil column experiment where 30–40 cm soil layer was 15NO3-labeled as residual nitrate was conducted to investigate the coupling effects of different water [sufficient irrigation (W1), two-thirds of the W1(W2)] and N [high level (N1), 50% of N1 (N2)] supplies under different irrigation modes [conventional irrigation (C), APRD (A)] on tomato growth, irrigation water (IWUE) and N use efficiencies (NUE), and the fate of residual N. The results showed that, compared with CW1N1, AW1N1 promoted root growth and nitrogen absorption, and increased tomato yield, while the N absorption and yield did not vary significantly in AW2N1. The N absorption in AW2N2 decreased by 16.1%, while the tomato yield decreased by only 8.8% compared with CW1N1. The highest IWUE appeared in AW2N1, whereas the highest NUE was observed in AW2N2, with no significant difference in NUE between AW2N1 and CW1N1 at the same N supply level. The 15N accumulation peak layer was almost the same as the originally labeled layer under APRD, whereas it moved 10–20 cm downwards under CW1N1. The amount of 15N accumulated in the 0-40 cm layer increased with the decreasing irrigation water and nitrogen supply, with an increase of 82.9–141.1% in APRD compared with that in CW1N1. The utilization of the 15N labeled soil profile by the tomato plants increased by 9–20.5%, whereas the loss rate of 15N from the plant-soil column system decreased by 21.3–50.1% in APRD compared with the CW1N1 treatment. Thus, APRD has great potential in saving irrigation water, facilitating water use while reducing the loss of residual nitrate accumulated in the soil profile, but has no significant effect on the NUE absorbed.

scholarly journals Physiological mechanism contributing to efficient use of water in field tomato under different irrigation

2009 ◽  
Vol 55 (No. 3) ◽  
pp. 128-133 ◽  
Author(s):  
S. Lei ◽  
Q. Yunzhou ◽  
J. Fengchao ◽  
S. Changhai ◽  
Y. Chao ◽  
...  
Keyword(s):  
Water Stress ◽  
Water Use ◽  
Deficit Irrigation ◽  
Water Status ◽  
Physiological Mechanism ◽  
Regulated Deficit Irrigation ◽  
Normal Water ◽  
Use Efficiency ◽  
Antioxidant Enzymes Activities ◽  
Partial Root Drying

An open field experiment was conducted under furrow irrigation with 3 treatments: CK (control), PRD (partial root drying) and RDI (regulated deficit irrigation). The results showed that water potential, water content of the leaf and growth were decreased under PRD and RDI and the plants met stronger water stress under RDI than under PRD regime. The water use efficiency (WUE) based on fruit yield reached to 10.95 kg/m<SUP>3</SUP> and 15.33 kg/m<SUP>3</SUP>, i.e. 17.1% and 63.9% increase over CK under RDI and PRD, respectively. The transpiration efficiency in RDI was kept at the same level as CK, whereas it was promoted by 32.4% under PRD condition. CAT, SOD and POD activities were more active under RDI and especially under PRD than under CK. Therefore, following conclusions could be made: moderate water stress induced osmotic regulation under PRD conditions, leading to normal water status, higher antioxidant enzymes activities, the same level of biomass and lower water use, thus providing some part of mechanism to higher WUE under PRD condition.

Water use efficiency and fruit quality of table grape under alternate partial root-zone drip irrigation

2008 ◽  
Vol 95 (6) ◽  
pp. 659-668 ◽  
Author(s):  
Taisheng Du ◽  
Shaozhong Kang ◽  
Jianhua Zhang ◽  
Fusheng Li ◽  
Boyuan Yan
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Fruit Quality ◽  
Drip Irrigation ◽  
Root Zone ◽  
Table Grape ◽  
Use Efficiency
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