Canopy morphological changes and water use efficiency in winter wheat under different irrigation treatments
Water is a key limiting factor in agriculture. Water resource shortages have become a serious threat to global food security. The development of water-saving irrigation techniques based on crop requirements is an important strategy to resolve water scarcity in arid and semi-arid regions. In this stu...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-04-01
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| Series: | Journal of Integrative Agriculture |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095311919627504 |
| _version_ | 1819092791911776256 |
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| author | Hong-xiang ZHAO Ping ZHANG Yuan-yuan WANG Tang-yuan NING Cai-long XU Pu WANG |
| author_facet | Hong-xiang ZHAO Ping ZHANG Yuan-yuan WANG Tang-yuan NING Cai-long XU Pu WANG |
| author_sort | Hong-xiang ZHAO |
| collection | DOAJ |
| description | Water is a key limiting factor in agriculture. Water resource shortages have become a serious threat to global food security. The development of water-saving irrigation techniques based on crop requirements is an important strategy to resolve water scarcity in arid and semi-arid regions. In this study, field experiments with winter wheat were performed at Wuqiao Experiment Station, China Agricultural University in two growing seasons in 2013–2015 to help develop such techniques. Three irrigation treatments were tested: no-irrigation (i.e., no water applied after sowing), limited-irrigation (i.e., 60 mm of water applied at jointing), and sufficient-irrigation (i.e., a total of 180 mm of water applied with 60 mm at turning green, jointing and anthesis stages, respectively). Leaf area index (LAI), light transmittance (LT), leaf angle (LA), transpiration rate (Tr), specific leaf weight, water use efficiency (WUE), and grain yield of winter wheat were measured. The highest WUE of wheat in the irrigated treatments was found under limited-irrigation and grain yield was only reduced by a small amount in this treatment compared to the sufficient irrigation treatment. The LAI and LA of wheat plants was lower under limited irrigation than sufficient irrigation, but canopy LT was greater. Moreover, the specific leaf weight of winter wheat was significantly lower under sufficient than limited irrigation conditions, while the leaf Tr was significantly higher. Correlation analysis showed that the increased LAI was associated with an increase in the leaf Tr, but the specific leaf weight had the opposite relationship with transpiration. Optimum WUE occurred over a reasonable range in leaf Tr. In conclusion, reduced irrigation can optimize wheat canopies and regulate water consumption, with only small reductions in final yield, ultimately leading to higher wheat WUE and water saving in arid and semi-arid regions. |
| first_indexed | 2024-12-21T23:01:14Z |
| format | Article |
| id | doaj.art-2577e21ef30b4e62b53af16305514a1a |
| institution | Directory Open Access Journal |
| issn | 2095-3119 |
| language | English |
| last_indexed | 2024-12-21T23:01:14Z |
| publishDate | 2020-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Integrative Agriculture |
| spelling | doaj.art-2577e21ef30b4e62b53af16305514a1a2022-12-21T18:47:17ZengElsevierJournal of Integrative Agriculture2095-31192020-04-0119411051116Canopy morphological changes and water use efficiency in winter wheat under different irrigation treatmentsHong-xiang ZHAO0Ping ZHANG1Yuan-yuan WANG2Tang-yuan NING3Cai-long XU4Pu WANG5College of Agronomy, Shandong Agricultural University, Tai'an 271018, P.R.ChinaCollege of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, P.R.ChinaCollege of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, P.R.ChinaCollege of Agronomy, Shandong Agricultural University, Tai'an 271018, P.R.ChinaInstitute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China; Correspondence XU Cai-long, Tel/Fax: +86-10-82108784College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, P.R.China; Correspondence WANG Pu, Tel/Fax: +86-10-62733611Water is a key limiting factor in agriculture. Water resource shortages have become a serious threat to global food security. The development of water-saving irrigation techniques based on crop requirements is an important strategy to resolve water scarcity in arid and semi-arid regions. In this study, field experiments with winter wheat were performed at Wuqiao Experiment Station, China Agricultural University in two growing seasons in 2013–2015 to help develop such techniques. Three irrigation treatments were tested: no-irrigation (i.e., no water applied after sowing), limited-irrigation (i.e., 60 mm of water applied at jointing), and sufficient-irrigation (i.e., a total of 180 mm of water applied with 60 mm at turning green, jointing and anthesis stages, respectively). Leaf area index (LAI), light transmittance (LT), leaf angle (LA), transpiration rate (Tr), specific leaf weight, water use efficiency (WUE), and grain yield of winter wheat were measured. The highest WUE of wheat in the irrigated treatments was found under limited-irrigation and grain yield was only reduced by a small amount in this treatment compared to the sufficient irrigation treatment. The LAI and LA of wheat plants was lower under limited irrigation than sufficient irrigation, but canopy LT was greater. Moreover, the specific leaf weight of winter wheat was significantly lower under sufficient than limited irrigation conditions, while the leaf Tr was significantly higher. Correlation analysis showed that the increased LAI was associated with an increase in the leaf Tr, but the specific leaf weight had the opposite relationship with transpiration. Optimum WUE occurred over a reasonable range in leaf Tr. In conclusion, reduced irrigation can optimize wheat canopies and regulate water consumption, with only small reductions in final yield, ultimately leading to higher wheat WUE and water saving in arid and semi-arid regions.http://www.sciencedirect.com/science/article/pii/S2095311919627504winter wheatlimited-irrigationcanopy characteristicstranspiration ratewater use efficiency |
| spellingShingle | Hong-xiang ZHAO Ping ZHANG Yuan-yuan WANG Tang-yuan NING Cai-long XU Pu WANG Canopy morphological changes and water use efficiency in winter wheat under different irrigation treatments Journal of Integrative Agriculture winter wheat limited-irrigation canopy characteristics transpiration rate water use efficiency |
| title | Canopy morphological changes and water use efficiency in winter wheat under different irrigation treatments |
| title_full | Canopy morphological changes and water use efficiency in winter wheat under different irrigation treatments |
| title_fullStr | Canopy morphological changes and water use efficiency in winter wheat under different irrigation treatments |
| title_full_unstemmed | Canopy morphological changes and water use efficiency in winter wheat under different irrigation treatments |
| title_short | Canopy morphological changes and water use efficiency in winter wheat under different irrigation treatments |
| title_sort | canopy morphological changes and water use efficiency in winter wheat under different irrigation treatments |
| topic | winter wheat limited-irrigation canopy characteristics transpiration rate water use efficiency |
| url | http://www.sciencedirect.com/science/article/pii/S2095311919627504 |
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