| Comprehensive evaluation of saline-alkali tolerance of silage maize at stages of fourteenth leaf and maturity |
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| DOI：10.7606/j.issn.1000-7601.2019.01.34 |
| Key Words: silage maize V14 stage mature stage saline-alkali-tolerance comprehensive evaluation |
| Author Name | Affiliation | | ZHANG Hui-li | College of Agriculture, Ningxia University, Yingchuan, Ningxia 750021, China | | Zhu Lin | Key Laboratory for Restoration and Restruction of Degraded Ecosystem in Northwestern China, Ministry of Education, Ningxia University, Yinchuan, Ningxia 750021, China
State Key Laboratory, Center of Land Degradation and Ecological Restoration of Northwest China, Ningxia University，Yinchuan, Ningxia 750021, China | | XU Xing | College of Agriculture, Ningxia University, Yingchuan, Ningxia 750021, China
Key Laboratory for Restoration and Restruction of Degraded Ecosystem in Northwestern China, Ministry of Education, Ningxia University, Yinchuan, Ningxia 750021, China |
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| Abstract: |
| The objective of this study was to evaluate saline-alkali tolerance of 25 silage maize cultivars in northern saline-alkali land in Yinchuan, Ningxia and identify and screen silage maize varieties with tolerance to saline-alkali and sensitive to saline-alkali, and then provide theoretical basis for selecting saline-alkali tolerant silage maize varieties. Based on the indexes of the stages of V14 (14th leaf) and maturity including phenotypic traits and physiological indexes, the saline-alkali tolerance of 25 silage maize germplasms were comprehensively evaluated by principal component analysis and the subordinate function method. The results showed that there was a significant difference in saline-alkali tolerance of different silage maize varieties in different growth stages. Based on comprehensive evaluation value (D) that represented saline-alkali-tolerance, tested maize genotypes were categorized into three groups: high tolerance (group A,D>0.6), intermediate tolerance (group B, 0.2<D<0.6), susceptibility (group C,D< 0.2). In the V14 stage, Ke duo 8, Gui silage No. 1, and 133-2/1528 had high saline-alkali tolerance with D values of 0.770, 0.705, and 0.614, respectively. The H14/A18 and Gui silage No. 1 had high tolerance during maturity with D values of 0.761 and 0.728, respectively. In these two stages, the saline-alkali sensitive cultivars were H14/1528 with D values of 0.140 and 0.155, respectively. Other maize genotypes belonged to the intermediate tolerance group with the D values ranging from 0.2 to 0.6. This results can provide a valuable foundation for selecting salt tolerance silage maize, esp. in the study region. |
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