中文
Cite this article:吴雨晴,郑春莲,李科江,等.长期咸水灌溉对棉田土壤水稳性团聚体的影响[J].灌溉排水学报,0,():-.
Wu Yuqing,Zheng Chunlian,Li Kejiang,et al.长期咸水灌溉对棉田土壤水稳性团聚体的影响[J].灌溉排水学报,0,():-.
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DOI:
Effects of long-term saline water irrigation on soil water-stable aggregates in cotton fields
Wu Yuqing1, Zheng Chunlian2, Li Kejiang2, Dang Hongkai2, Cao caiyun2, Ma junyong3, Zhang Junpeng1
1.College of Water Conservancy and Civil Engineering, Shandong Agricultural University;2.Key Laboratory of Crop Drought Resistance Research of Hebei Province/Institute of Dryland Farming, Hebei Academy of Agriculture and Forestry Sciences;3.Key Laboratory of Crop Drought Resistance Research of Hebei Province/Institute of Dryland Farming, Hebei Academy of Agriculture and Forestry SciencesKey Laboratory of Crop Drought Resistance Research of Hebei Province/Institute of Dryland Farming, Hebei Academy of Agriculture and Forestry Sciences
Abstract:
【Objective】This paper aimed to understand the impact of saline irrigation on soils water-stable aggregates.【Method】A field study was conducted at North China Plain, where saline water has been used for irrigation for 10 years. The study evaluated the effects of long-term saline water irrigation with different salinity level on soil salinity and water-stable aggregates in cotton fields. Six groups of irrigation salinity levels were set up: 1 g/L (CK), 2 g/L (T1), 4 g/L (T2), 6 g/L (T3), 8 g/L (T4), 10 g/L (T5). The salinity of 0~30 cm soil layer and the content of >0.25 mm water-stable aggregates, mean weight diameter (MWD), geometric average diameter (GMD) and fractal dimension (D) were analyzed. 【Result】Soil salinity increased with the increase of irrigation water salinity, and decreased with the increase of soil depth in the early growth stage of cotton. By contrast, the soil salinity decreased in each soil layer, and showed a trend of decreasing with the increase of soil depth in the later growth stage. The content of >0.25 mm water-stable aggregates, MWD and GMD decreased with the increase of irrigation water salinity, while D increased with the increase of irrigation salinity. After the improvement of soil environment, such as the leaching of salts by rainwater and natural soil subsidence during the growth period, the soil water-stable aggregates in cotton field were restored, and the number of large aggregates, MWD and GMD in the later growth period of cotton increased compared with the earlier growth period, and D decreased, with the recovery effect of 10~20 cm soil layer being the most remarkable. 【Conclusion】Comprehensive test results showed that saline water irrigation with <6 g/L made less salt accumulation, and had less damage to soil water-stable aggregates in cotton field.
Key words:  saline water irrigation; soil salt; soil water-stable aggregates; stability index