| Effects of irrigation with saline water on soil water-salt transport features and cotton yield |
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| DOI：10.7606/j.issn.1000-7601.2010.03.02 |
| Key Words: saline water drip irrigation with mulch soil water and salinity dynamics cotton yield Tarim Basin |
| Author Name | Affiliation | | CHEN Xiulong | Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences，Urumqi, Xinjiang 830011, China
Graduate School，Chinese Academy of Sciences, Beijing 100039, China | | HU Shunjun | Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences，Urumqi, Xinjiang 830011, China | | LI Xiucang | Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences，Urumqi, Xinjiang 830011, China
Graduate School，Chinese Academy of Sciences, Beijing 100039, China |
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| Abstract: |
| As freshwater is becoming increasingly short, it is impending to seek other substitute water resources for
agriculture. Some saline groundwater with degree of mineralization (DOM) at 3 g/L to5 g/L in shallow underground lay
er was largely distributed at some regions in Tarim Basin, and the groundwater may be a great potential source for agriculture. However, it is a great challenge about using saline water safely and effectively under the special climate and envi-ronment of Tarim Basin area. Based on the experiment of mini-plot and drip imigation under film, we irrigated cotton in different plots with water of different degree of mineralization, so as to find out dynamic changes of soil salt-water and cotton yield. The results showed that: (1) The dynamic variation of soil salt is remarkably related to that of soil water. Moreover, the dynamic variation of soil salt is mainly influenced by climate and irrigation, and the dynamic variation of soil water is mainly influenced by growth stage of cotton and irrigation; (2) Drip irrigation under flm with saline water has the same leaching effect as that of fresh water; (3) Compared with fresh water, irrigation with saline water has nega-tive effect on cotton yield, cotton boll number and boll weight, but no influence on lint percentage; (4) Water beyond degree of mineralization 3.24 g/L, is not fit for agriculture in Tarim Basin area. |
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