不同厚度降解地膜对坡耕地溶解态氮磷流失的影响
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S157.1

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国家自然科学基金项目(41701311,42377329,42077061);山东省自然科学基金项目(ZR2023MD081);山东省高等学校青年创新团队项目(2022KJ115,LUJIAORENZI20199)


Effects of Different Thickness of Degradable Plastic Film on the Loss of Dissolved Nitrogen and Phosphorus in Sloping Farmland
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    摘要:

    [目的] 为探究降解地膜覆盖对径流及溶解态氮磷流失的影响。[方法] 利用野外原位径流小区,以覆膜垄作花生种植为研究对象,设置0.003 mm厚聚乙烯普通地膜覆盖处理(PF)和厚度为0.006 mm (BF1),0.008 mm (BF2),0.010 mm (BF3),0.012 mm (BF4)的降解地膜覆盖处理及未覆膜处理(CK),测定不同处理在自然降雨条件下的径流量及径流中铵态氮(NH4+—N)、硝态氮(NO3-—N)、速效磷(PO43-—P)浓度,分析不同厚度降解地膜覆盖条件下径流及养分流失特征。[结果] (1)降解地膜降解所需时间随地膜厚度的增加而增加。(2)各处理的累积径流量由小到大为BF1<BF2<BF3<PF<CK<BF4,BF1与BF4之间差异显著(p<0.05)。(3)与CK相比,各覆膜处理均能不同程度减少氮磷累积流失量。其中,BF1处理对NH4+-N和NO3-—N流失量的削减效果较好,而BF2处理对PO43-—P流失量的削减效果较好。(4)在5个覆膜处理中,BF4处理的NO3--N和PO43--P流失量最高,而BF3处理的NH4+—N流失量最高。[结论] 研究结果可为防治覆膜坡耕地水土及养分流失、解决农业面源污染等问题提供理论基础,对绿色农业发展和生态可持续发展具有重要意义。

    Abstract:

    [Objective] To explore the effects of degradable mulch film mulching on runoff and loss of dissolved nitrogen and phosphorus. [Methods] Polyethylene film mulching (PF) with a thickness of 0.003 mm, degradable film mulching with a thickness of 0.006 mm (BF1), 0.008 mm (BF2), 0.010 mm (BF3) and 0.012 mm (BF4), and no mulch (CK) were set up. In in-situ runoff plots, using mulching on ridge tillage peanut planting as the study object, the runoff and concentration of ammonium nitrogen (NH4+—N), nitrate nitrogen (NO3-—N), and available phosphorus (PO43-—P) in runoff under natural rainfall conditions were measured, and the runoff and nutrient loss characteristics under different thickness of degradable mulch film were analyzed. [Results] (1) The degradation time of degradable film increased with the increase of film thickness. (2) The order of cumulative runoff was BF1<BF2<BF3<PF<CK<BF4, and there was significant difference between BF1 and BF4 (p<0.05). (3) Compared with CK, different film mulching can reduce the cumulative loss of nitrogen and phosphorus to varying degrees. BF1 had the most significant effect on reducing the loss of NH4+-N and NO3-—N, while BF2 had the most significant effect on reducing the loss of PO43-—P. (4) Among the five laminating treatments, the NO3-—N and PO43-—P loss in BF4 treatment was the highest, while the NH4+-N loss in BF3 treatment was the highest. [Conclusion] The research results can provide a theoretical basis for the prevention and control of water, soil, and nutrient loss in sloping farmland mulching with plastic film and solving the problems of agricultural non-point source pollution, and have important significance for green agricultural development and ecological sustainable development.

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王凯丽,张含玉,方怒放,刘前进,李靖江.不同厚度降解地膜对坡耕地溶解态氮磷流失的影响[J].水土保持学报,2024,38(2):406~413

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  • 收稿日期:2023-06-19
  • 最后修改日期:2023-09-08
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  • 在线发布日期: 2024-05-20
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