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应用生态学报 ›› 2022, Vol. 33 ›› Issue (4): 1055-1062.doi: 10.13287/j.1001-9332.202204.002

• 研究论文 • 上一篇    下一篇

咸水沟灌对棉田土壤水稳性团聚体稳定性的影响

毕言鹏1,2, 郑春莲2, 党红凯2, 曹彩云2, 李科江2, 马俊永2, 王赫1, 张俊鹏1,2*   

  1. 1山东农业大学水利土木工程学院, 山东泰安 271018;
    2河北省农林科学院旱作农业研究所河北省农作物抗旱研究重点实验室, 河北衡水 053000
  • 收稿日期:2021-07-12 接受日期:2022-01-27 出版日期:2022-04-15 发布日期:2022-10-15
  • 通讯作者: * E-mail: jpengzhang@163.com
  • 作者简介:毕言鹏, 男, 1996年生, 硕士研究生。主要从事微咸水安全利用技术研究。E-mail: 1595858284@qq.com
  • 基金资助:
    国家自然科学基金项目(51609248)、国家现代农业棉花产业技术体系建设专项(CARS-15-13)和河北省农作物抗旱研究重点实验室开放基金资助

Effects of saline-water furrow irrigation on the stability of soil water-stable aggregates in cotton field

BI Yan-peng1,2, ZHENG Chun-lian2, DANG Hong-kai2, CAO Cai-yun2, LI Ke-jiang2, MA Jun-yong2, WANG He1, ZHANG Jun-peng1,2*   

  1. 1College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Tai'an 271018, Shandong, China;
    2Key Laboratory of Crop Drought Resistance Research of Hebei Province, Institute of Dryland Farming, Hebei Academy of Agriculture and Forestry Sciences, Hengshui 053000, Hebei, China
  • Received:2021-07-12 Accepted:2022-01-27 Online:2022-04-15 Published:2022-10-15

摘要: 探明咸水沟灌对土壤水稳性团聚体的影响对实现咸水资源安全高效利用具有重要意义。本研究在棉花长期定位咸水沟灌试验(始于2006年)的基础上,分析了不同矿化度(1、2、4、6、8、10 g·L-1)咸水连续灌溉第10年和第15年棉田土壤盐分和水稳性团聚体稳定性的变化特征。结果表明: 沟底0~30 cm土层土壤盐分随灌溉水矿化度的升高而增加,其中6、8、10 g·L-1灌水处理与1 g·L-1处理间差异达显著水平;随着土层深度的增加,各处理土壤盐分逐渐增大。咸水沟灌有降低沟底土壤水稳性团聚体稳定性的趋势,当灌溉水矿化度≥6 g·L-1时,水稳性大团聚体(>0.25 mm)质量分数、团聚体平均重量直径和几何平均直径显著降低,分形维数和平均重量比表面积显著增大;随着土层深度的增加,各处理土壤水稳性团聚体稳定性下降。连续多年咸水沟灌条件下,各处理棉田沟底0~30 cm土层土壤盐分和水稳性团聚体稳定性未随灌水年限的增加而逐年积累与恶化。在本研究灌溉制度下,采用≤4 g·L-1咸水沟灌对试验区棉田土壤盐分和水稳性团聚体稳定性指标无显著影响。

关键词: 咸水, 沟灌, 土壤盐分, 土壤水稳性团聚体

Abstract: It is of great importance to explore the effects of saline-water furrow irrigation on soil water-stable aggregates for safe and efficient utilization of saline water resources. We conducted a long-term cotton experiment with six levels of saline-water furrow irrigation (1, 2, 4, 6, 8, 10 g·L-1) since 2006 and analyzed the variations of soil salinity and water-stable aggregates in the 10th and 15th years under saline irrigation. The results showed that soil salinity in the 0-30 cm layer at the ditch increased with increasing salinity level of irrigation water. There were significant differences between the 6, 8, 10 g·L-1 and 1 g·L-1 treatments. Soil salinity in each treatment increased gradually with increasing soil depth. Saline-water furrow irrigation tended to reduce the stability of soil water-stable aggregates. When the salinity level of the irrigation water was ≥6 g·L-1, the mass fraction of macroaggregates (>0.25 mm), the mean weight diameter and geometric mean diameter of water-stable aggregates significantly decreased. In contrast, the fractal dimension and mean weight specific surface area increased significantly. The stability of soil water-stable aggregates decreased with soil depth in all treatments. Under the condition of saline-water furrow irrigation for several years, there was no accumulation of soil salinity and instability of water-stable aggregates in the 0-30 cm soil layer at the ditch with each passing year. With the irrigation scheduling of this study, saline-water furrow irrigation with salinity ≤4 g·L-1 did not affect soil salinity and water-stable aggregate stability of cotton field in this area.

Key words: saline water, furrow irrigation, soil salinity, soil water-stable aggregate