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The impact of irrigation on yield of alfalfa and soil chemical properties of saline-sodic soils

BACKGROUND: Forage production in the saline-sodic soil of the western Songnen Plain Northeast China depends on irrigation. Therefore, the water use efficiency (WUE) and soil chemical properties are key factors in the overall forage productivity in this water scarce region. Improving forage yield, WU...

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Autores principales: Yang, Hongtao, An, Fenghua, Yang, Fan, Wang, Zhichun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: PeerJ Inc. 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6626524/
https://www.ncbi.nlm.nih.gov/pubmed/31333902
http://dx.doi.org/10.7717/peerj.7148
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author Yang, Hongtao
An, Fenghua
Yang, Fan
Wang, Zhichun
author_facet Yang, Hongtao
An, Fenghua
Yang, Fan
Wang, Zhichun
author_sort Yang, Hongtao
collection PubMed
description BACKGROUND: Forage production in the saline-sodic soil of the western Songnen Plain Northeast China depends on irrigation. Therefore, the water use efficiency (WUE) and soil chemical properties are key factors in the overall forage productivity in this water scarce region. Improving forage yield, WUE, and soil properties under irrigation are very important for food and ecological security in this water-deficient region. Additionally, a suitable irrigation schedule for this region is necessary. METHODS: A field experiment was conducted between 2015 and 2018 to evaluate the effects of irrigation on artificial grassland productivity and the changes in soil chemical properties as well as to plan a reliable irrigation schedule for the western Songnen Plain. Eight irrigation treatments were designed, which depended on the three growth stages of alfalfa. The shoot height (SH), the chlorophyll content (SPAD), the dry yield (DM), the ratio of stem to leaves (SLR), the WUE, the changes in the chemical properties of the soil, and precipitation and evaporation were investigated. RESULTS: The SH, DM, WUE, and SLR were significantly increased by irrigation (P < 0.01). However, the SPAD resulting from irrigation was not significantly higher than the SPAD of CK (no irrigation) (P < 0.05). In addition, the soil chemical properties at the depth of 0–100 cm were significantly decreased by irrigation P (0.05). For example, the soil electrical conductivity, sodium absorption ratio, and total alkalization were reduced 182–345 μS cm(−1), 8.95–9.00 (mmol(c)/L)(1/2), and 3.29–4.65 mmol(c) L(−1) by different irrigation treatments, respectively. Finally, considering the highest WUE of I5 (irrigation at branch stage) (2.50 kg m(−3)), relative high DM of I5 (787.00 g m(−2)), the precipitation, the evaporation, the water resources, and the changes of the soil’s chemical properties, 236.50 mm of irrigation water was recommended at the branching stage of alfalfa for the western Songnen Plain, Northeast China.
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spelling pubmed-66265242019-07-22 The impact of irrigation on yield of alfalfa and soil chemical properties of saline-sodic soils Yang, Hongtao An, Fenghua Yang, Fan Wang, Zhichun PeerJ Agricultural Science BACKGROUND: Forage production in the saline-sodic soil of the western Songnen Plain Northeast China depends on irrigation. Therefore, the water use efficiency (WUE) and soil chemical properties are key factors in the overall forage productivity in this water scarce region. Improving forage yield, WUE, and soil properties under irrigation are very important for food and ecological security in this water-deficient region. Additionally, a suitable irrigation schedule for this region is necessary. METHODS: A field experiment was conducted between 2015 and 2018 to evaluate the effects of irrigation on artificial grassland productivity and the changes in soil chemical properties as well as to plan a reliable irrigation schedule for the western Songnen Plain. Eight irrigation treatments were designed, which depended on the three growth stages of alfalfa. The shoot height (SH), the chlorophyll content (SPAD), the dry yield (DM), the ratio of stem to leaves (SLR), the WUE, the changes in the chemical properties of the soil, and precipitation and evaporation were investigated. RESULTS: The SH, DM, WUE, and SLR were significantly increased by irrigation (P < 0.01). However, the SPAD resulting from irrigation was not significantly higher than the SPAD of CK (no irrigation) (P < 0.05). In addition, the soil chemical properties at the depth of 0–100 cm were significantly decreased by irrigation P (0.05). For example, the soil electrical conductivity, sodium absorption ratio, and total alkalization were reduced 182–345 μS cm(−1), 8.95–9.00 (mmol(c)/L)(1/2), and 3.29–4.65 mmol(c) L(−1) by different irrigation treatments, respectively. Finally, considering the highest WUE of I5 (irrigation at branch stage) (2.50 kg m(−3)), relative high DM of I5 (787.00 g m(−2)), the precipitation, the evaporation, the water resources, and the changes of the soil’s chemical properties, 236.50 mm of irrigation water was recommended at the branching stage of alfalfa for the western Songnen Plain, Northeast China. PeerJ Inc. 2019-07-10 /pmc/articles/PMC6626524/ /pubmed/31333902 http://dx.doi.org/10.7717/peerj.7148 Text en © 2019 Yang et al. http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
spellingShingle Agricultural Science
Yang, Hongtao
An, Fenghua
Yang, Fan
Wang, Zhichun
The impact of irrigation on yield of alfalfa and soil chemical properties of saline-sodic soils
title The impact of irrigation on yield of alfalfa and soil chemical properties of saline-sodic soils
title_full The impact of irrigation on yield of alfalfa and soil chemical properties of saline-sodic soils
title_fullStr The impact of irrigation on yield of alfalfa and soil chemical properties of saline-sodic soils
title_full_unstemmed The impact of irrigation on yield of alfalfa and soil chemical properties of saline-sodic soils
title_short The impact of irrigation on yield of alfalfa and soil chemical properties of saline-sodic soils
title_sort impact of irrigation on yield of alfalfa and soil chemical properties of saline-sodic soils
topic Agricultural Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6626524/
https://www.ncbi.nlm.nih.gov/pubmed/31333902
http://dx.doi.org/10.7717/peerj.7148
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