| Cite this article: | 王茜,董世德,崔光旭,等.咸淡水交替滴灌对滨海盐渍土水盐动态和作物生长的影响[J].灌溉排水学报,0,():-. |
| Wang Qian,Dong Shide,Cui Guangxu,et al.咸淡水交替滴灌对滨海盐渍土水盐动态和作物生长的影响[J].灌溉排水学报,0,():-. |
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| Effects of Alternate Saline and Fresh Water Drip Irrigation on Water and Salt Dynamics and Crop Growth in Coastal Saline Soil |
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Wang Qian1, Dong Shide2, Cui Guangxu2, Ma Qian2, Li Hanbo3, Su Shengjia4, Wang Guangmei2
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1.College of Life Sciences, Ludong University;2.CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation/Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences/Shandong Key Laboratory of Coastal Environmental Processes;3.Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University;4.Shandong Saline-alkali Land Modern Agriculture Co. LTD
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| Abstract: |
| 【Objective】In order to study the effects of different frequency of alternating saline and fresh water drip irrigation on soil water and salt distribution and crop growth in the Yellow River Delta region.【Method】A field experiment of alternating saline and fresh water drip irrigation for Vicia villosa(V. villosa)-maize(Zea mays L.) in two seasons was conducted. The experiment was divided into five frequency treatments of alternating drip irrigation with saline and fresh water, and the corresponding irrigation frequency ratios of saline water (salinity of about 4 g/L) and fresh water (salinity of about 1 g/L) were 0:1, 1:3, 1:1, 3:1 and 1:0 (T1~T5), respectively.【Result】(1) Soil water dynamics was mainly controlled by irrigation in non-rainy season, and soil salinity increased significantly with the increase of saline irrigation frequency. During the rainy season, soil water dynamics were mainly affected by rainfall, and the salinity in each treatment decreased gradually. (2) On the whole, salt in 0~20 cm soil layer increased gradually in the V. villosa season and reached the highest before returning, then decreased gradually in the maize season and decreased to the level before the experiment at the maize harvest stage, and annual salt maintained a balance. In T1~T4 treatment, the salinity in the soil layer of 20~60 cm showed a decreasing trend from the regreening stage of V. villosa to the mature stage of maize, decreased by 26.14%, 11.61%, 13.17% and 6.43%, respectively, while that in T5 increased by 21.26%. (3) With the increase of saline irrigation frequency, the yield of fresh grass and dry matter yield decreased. Compared with T1, there was no significant difference between T2~T4, and T5 significantly decreased by 15.54% and 19.69%, respectively. (4) Maize yield increased first and then decreased with the increase of saline water irrigation frequency. Grain yield at T2 was significantly higher than that at T5, but there was no significant difference between T2 and T1, T3 and T4. The grain yield of T3~T5 treatment was 4.33%, 4.58% and 7.87% lower than that of T1, respectively.【Conclusion】The frequency ratio of saline and fresh water alternating drip irrigation 3:1 (T4) can reduce the amount of fresh water irrigation, maintain the annual soil salt balance, and stabilize the biomass of the V. villosa and maize yield, which can be used as the best saline and fresh water alternating irrigation scheme for saline farmland in the Yellow River Delta. |
| Key words: saline water; alternate irrigation with saline and fresh water; Yellow River Delta; soil salinity; maize |
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