| Effects of plastic film\|mulching and irrigation on the salt ion distribution and biomass of maize in coastal saline\|alkali soil |
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| DOI：10.7606/j.issn.1000-7601.2020.04.10 |
| Key Words: coastal saline\|alkali soil salt ion distribution of maize dry matter accumulation film\|mulching drip irrigation |
| Author Name | Affiliation | | YE Lantao | College of Water Conservancy Engineering, Tianjin Agricultural University, Tianjin， 300384, China
Sino-US International Joint Research Center for Ecological Agriculture and Water Environment Protection, Tianjin， 300384, China
Tianjin Agricultural Water Conservancy Engineering and Technology Center, Tianjin, 300384, China | | ZHOU Qingyun | College of Water Conservancy Engineering, Tianjin Agricultural University, Tianjin， 300384, China
Sino-US International Joint Research Center for Ecological Agriculture and Water Environment Protection, Tianjin， 300384, China
Tianjin Agricultural Water Conservancy Engineering and Technology Center, Tianjin, 300384, China | | LI Songmin | College of Water Conservancy Engineering, Tianjin Agricultural University, Tianjin， 300384, China
Sino-US International Joint Research Center for Ecological Agriculture and Water Environment Protection, Tianjin， 300384, China
Tianjin Agricultural Water Conservancy Engineering and Technology Center, Tianjin, 300384, China | | MA Bo | College of Water Conservancy Engineering, Tianjin Agricultural University, Tianjin， 300384, China
Sino-US International Joint Research Center for Ecological Agriculture and Water Environment Protection, Tianjin， 300384, China
Tianjin Agricultural Water Conservancy Engineering and Technology Center, Tianjin, 300384, China | | WANG Hang | College of Water Conservancy Engineering, Tianjin Agricultural University, Tianjin， 300384, China
Sino-US International Joint Research Center for Ecological Agriculture and Water Environment Protection, Tianjin， 300384, China
Tianjin Agricultural Water Conservancy Engineering and Technology Center, Tianjin, 300384, China | | YIN Linping | College of Water Conservancy Engineering, Tianjin Agricultural University, Tianjin， 300384, China
Sino-US International Joint Research Center for Ecological Agriculture and Water Environment Protection, Tianjin， 300384, China
Tianjin Agricultural Water Conservancy Engineering and Technology Center, Tianjin, 300384, China |
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| Abstract: |
| In this experiment, maize was used as test material, and drip irrigation under film was conducted in Tianjin coastal saline\|alkali soil in 2017-2018. The effects of mulching and irrigation on the distribution characteristics of salt ion mass and the change of dry matter and yield in maize were analyzed. The results are as follows: (1) Film mulching and irrigation had a significant effect on the change of ion quality in maize and significantly reduced the absorption quality of Na+ in roots. FI20 was 56% smaller than LI10 in maturity, thus, reducing the damage of salt to leaves. It significantly increased the accumulation mass of K+ in stems. FI20 was 24% higher than LI10 did in maturity, and improved the salt tolerance of plants. It also significantly increased the mass of Ca2+ in leaves. FI20 was 96% higher than LI10 at the seedling stage, promoted the growth of young roots and the formation of root hairs, improved the ion balance in maize and reduced the salt stress. It significantly increased the mass of Mg2+ in leaves and FI20 was 136% higher than LI10 in the jointing stage. It increased strengthen photosynthesis of leaves and enhanced salt tolerance of plants. (2) The dry matter weight of the aboveground and root increased with the extension of the growth period. Mulching and irrigation changed the mass of salt ions in the plant, and had a great influence on the accumulation of maize biomass. FI20 was 1%~46% bigger than LI10 in maturity. There was a significant influence on the ratio of root to crown (R/S) of maize, and changed the proportion of biomass distribution significantly. FI20 was 48%~52% smaller than LI10 in maturity. (3) The growth simulation equation of dry matter in 2017 was established by using logistic curve, and the salt ion correction coefficient was introduced, the fitting equation was significant. The salt ion model of maize was verified using the data of maize experiment in 2018. The fitting curves of each treatment were close to the measured values, which were in line with the change rule of logistic curve. The dry matter growth model can better simulate the accumulation process of dry matter of maize in saline\|alkali land. To sum up, the treatment of film mulching and irrigation of FI20 had the most significant effect on the salt ion regulation of the plant, improved the salt tolerance of maize, changed the allocation of biomass, obtained the appropriate dry matter accumulation, with the better yield. |
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