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Irrigation Scheduling and Crop Water Relations
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Irrigation Scheduling and Crop Water Relations

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Water, Agriculture and Aquaculture".

Deadline for manuscript submissions: closed (28 February 2021) | Viewed by 28741

Special Issue Editor

Dr. Guy Roth

E-Mail Website
Guest Editor
Sydney Institute of Agriculture, School of Life and Environmental Sciences, The University of Sydney, NSW 2006, Australia
Interests: soil moisture monitoring; cotton; farming systems; irrigation scheduling; plant sensing; canopy temperature; farmer practice
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Irrigation scheduling and crop water relations are interdpendent. There are many soil, plant and/or climate-based technologies. Some of these work well in a controlled research project but fail in commercial farmer environments. Some are widely used in a specfic crop, but not others. The measurment of soil mositure status has not advanced as significantly as might have been expected. New digital technologies are enabling soil and plant-based sensing. The aim of this Special Issue is to capture an international picture of significant irrigation scheduling technologies and their use. 

Assoc. Prof. Guy Roth
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • irrigation scheduling
  • soil water measurment
  • plant sensing
  • automation
  • farmer adoption
  • crop water relations

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Published Papers (3 papers)

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Research

19 pages, 5484 KiB  
Article
Effects of Water Stress on Photosynthesis, Yield, and Water Use Efficiency in Winter Wheat
by Wenhui Zhao, Leizhen Liu, Qiu Shen, Jianhua Yang, Xinyi Han, Feng Tian and Jianjun Wu
Water 2020, 12(8), 2127; https://doi.org/10.3390/w12082127 - 27 Jul 2020
Cited by 179 | Viewed by 18830
Abstract
Drought has become one of the major constraints to agricultural development, particularly in areas that lack water. Studying the effects of different water stresses on the photosynthesis, growth, yield, water use efficiency (WUE) and irrigation water productivity (IWP) of winter wheat will provide [...] Read more.
Drought has become one of the major constraints to agricultural development, particularly in areas that lack water. Studying the effects of different water stresses on the photosynthesis, growth, yield, water use efficiency (WUE) and irrigation water productivity (IWP) of winter wheat will provide data for the development of scientific irrigation strategies for water-saving agricultural methods. According to the size of the field water capacity, four different water stress levels were set, i.e., 30–40% (severe stress), 40–50% (moderate stress), 50–60% (mild stress) and 60–80% (well-watered) of field water capacity, controlling the amount of irrigation through an automatic irrigation system. The results showed that the seasonal changes in photosynthetic parameters, such as net photosynthetic rate (Pn), intercellular carbon concentration (Ci), stomatal conductance (Gs) and transpiration (E), significantly decreased under moderate and severe stress. As a result, the height, biomass and grain size of winter wheat decreased significantly, which led to low WUE and IWP. The Pn of the mild stress group only slightly decreased compared to that of the well-watered group, and was actually higher during the flowering and grain-filling stages, resulting in increases in dry biomass and 1000 grain weight of 2.07% and 1.95%, respectively. Higher WUE and IWP were attributed to higher yields and less water use. Thus, mild stress (60–80% field water capacity) resulted in the optimal use of water resources without a significant reduction in yield in the North China Plain (NCP). Therefore, mild stress can be considered a suitable environment for winter wheat growth in arid areas. Full article
(This article belongs to the Special Issue Irrigation Scheduling and Crop Water Relations)
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19 pages, 1388 KiB  
Article
The Effect of Fertigation on Cabbage (Brassica oleracea L. var. capitata) Grown in a Greenhouse
by Xianbing Wu, Meijian Bai, Yinong Li, Taisheng Du, Shaohui Zhang, Yuan Shi and Yanan Liu
Water 2020, 12(4), 1076; https://doi.org/10.3390/w12041076 - 10 Apr 2020
Cited by 13 | Viewed by 4688
Abstract
Understanding the response of crop growth to water and fertilizer is helpful to improve their management and use efficiency. Three water and fertilizer coupling treatments were designed to carry out a two-season trial on two cabbage (Brassica oleracea L. var. capitata) [...] Read more.
Understanding the response of crop growth to water and fertilizer is helpful to improve their management and use efficiency. Three water and fertilizer coupling treatments were designed to carry out a two-season trial on two cabbage (Brassica oleracea L. var. capitata) cultivars in spring and autumn in the Beijing–Tianjin–Hebei region. The irrigation timings of the three treatments were controlled by the soil moisture content of 0–20 cm soil layer. Treatment 1 (LWHF): when the soil moisture content was decreased to 75% of the field capacity (θf), irrigation was carried out (i.e., the lower limit of irrigation was 75%θf), the critical soil moisture content for stopping irrigation was 90%θf (upper limit of irrigation), and the nitrogen (N) application amount was 400 kg/ha; treatment 2 (HWLF): the lower and upper limits of irrigation were 85%θf and 100%θf, respectively, and the N application amount was 200 kg/ha; and treatment 3 (MWMF): the lower and upper limits of irrigation were 75%θf and 100%θf, respectively, and the N application amount was 300 kg/ha. The results showed that the yield and its related parameters of cabbage in spring were higher than those in autumn because of the use of different cultivars and seasons. The growth indices of HWLF and MWMF in the two seasons were larger than that of LWHF, and the yields of HWLF were the highest, 78.37 t/ha (spring) and 64.42 t/ha (autumn), respectively. The nitrogen use efficiencies (NUEs) of LWHF in spring and HWLF in autumn were the highest, 213.29 kg/kg and 391.83 kg/kg, respectively. In general, there were statistically significant differences in the cumulative increment in plant height, stem diameter and leaf area in the two-season trial, yield in autumn and NUE in spring among the three treatments. In addition, there was a significant positive linear correlation between almost all indices in different growth stages and the corresponding evapotranspiration (ETi). It is suggested that the application of drip irrigation under mulch should be approximately 114.7–125.0 mm, and the N fertilization should be about 200 kg/ha. Full article
(This article belongs to the Special Issue Irrigation Scheduling and Crop Water Relations)
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14 pages, 901 KiB  
Article
Irrigation Requirement for Eucalyptus pellita during Initial Growth
by Dwinata Aprialdi, Muhammad Ibnu Haiban, Bjørn Kløve and Ali Torabi Haghighi
Water 2019, 11(10), 1972; https://doi.org/10.3390/w11101972 - 21 Sep 2019
Cited by 4 | Viewed by 4524
Abstract
The growth of Eucalyptus pellita in forestry plantations requires attention to water requirements, especially in the initial growth phase from seedling to field-ready plant. In this study, actual evapotranspiration (ETa), crop coefficient (Kc), and the irrigation requirement of E. [...] Read more.
The growth of Eucalyptus pellita in forestry plantations requires attention to water requirements, especially in the initial growth phase from seedling to field-ready plant. In this study, actual evapotranspiration (ETa), crop coefficient (Kc), and the irrigation requirement of E. pellita were assessed during the nursery growth phase (day 40–142). The experimental set-up included lysimeters with different treatments in terms of plants, drainage, and soil conditions. Plant growth and water balance were monitored during June September 2018 in an open nursery area in Riau, Indonesia. ETa was determined by the water balance lysimeter method and potential (reference) evapotranspiration (ETo) was extracted based on the Penman-Monteith method (FAO/56). The results showed that the average Kc value for E. pellita at age 40–142 days is 0.79, which exceeds that reported for E. grandis. The recommended irrigation requirement varies depending on precipitation, from 70 mL/plant/day with no rainfall to zero at precipitation of >30 mm/day. This is the first study to assess water use in E. pellita growing in pots during the nursery phase, which provides guidance on irrigation requirements during their initial growth phase. Full article
(This article belongs to the Special Issue Irrigation Scheduling and Crop Water Relations)
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