水氮耦合对盐碱地柳枝稷生物质产量、品质及水肥利用的影响
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(1.宁夏大学生态环境学院,宁夏 银川 750021;2.宁夏旱区资源评价与环境调控重点实验室,宁夏 银川 750021;3.宁夏大学农学院,宁夏 银川 750021)

作者简介:

常雯雯(1993-),女,山西晋城人,硕士研究生,主要从事能源植物栽培与利用的研究。E-mail:changwenwen93@163.com。

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基金项目:

基金项目:国家自然科学基金项目(31560361;31860344)。


Effects of water-nitrogen coupling on biomass yield,quality and water and fertilizer utilization of switchgrass in saline-alkali soil
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(1.College of Ecology and Environment,Ningxia University,Yinchuan Ningxia 750021;2.Ningxia Key Laboratory of Resource Assessment and Environment Regulation in Arid Region,Yinchuan Ningxia 750021;3.College of Agronomy,Ningxia University,Yinchuan Ningxia 750021)

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    摘要:

    在宁夏银北盐碱地区,以‘Cave-in-rock’柳枝稷为材料,采用随机区组试验设计,研究了水氮耦合对柳枝稷生物质产量、品质及水肥利用效率的影响,利用模糊相似优先比法分析了不同水氮处理下柳枝稷产量、品质及水肥利用效率的变化特征。结果表明,在盐碱地条件下,充足的灌水和适量的氮肥投入是柳枝稷高产和水肥高效利用的保证。在相同灌水条件下,中氮处理显著提高了柳枝稷的产量、纤维素、半纤维素含量、水分利用效率、氮肥农学效率和氮肥利用效率;在同一施氮量条件下,随着灌水量的提高,柳枝稷产量有所增加,纤维素、半纤维素、灰分含量先降低后升高。中氮处理在不同水分条件下均能维持较低的灰分,且在充足水分条件下能获得最高产量、氮肥农学效率、氮肥利用效率和水分利用效率。高水中氮(3000 m3·hm-2、N 120 kg·hm-2)处理有利于柳枝稷高产优质,且水肥利用效率高,是宁夏银北盐碱地区柳枝稷生物质生产的最适水氮管理措施。

    Abstract:

    The effects of water-nitrogen coupling on biomass yield,quality and water and fertilizer use efficiency of switchgrass are studied by randomized block experiment using ‘Cave-in-rock’ switchgrass in the saline-alkali area of Yinbei,Ningxia.The changes characteristics of biomass yield,quality and water and fertilizer use efficiency of switchgrass under different water and nitrogen treatments are studied by using the method of Fuzzy similar priority ratio.The results show that under the conditions of saline-alkali soil,adequate irrigation and appropriate nitrogen fertilizer input are the guarantee for high yield and efficient utilization of water and fertilizer for switchgrass.Under the same irrigation conditions,medium nitrogen treatment significantly increases the yield,cellulose,hemicellulose content,water use efficiency,nitrogen agronomic efficiency and nitrogen use efficiency of switchgrass.Under the same nitrogen application rate,with the increase of irrigation,the yield of switchgrass increases,and the contents of cellulose,hemicellulose and ash decreases first and then increases.Medium nitrogen treatment can maintain low ash under different water conditions,and can obtain the highest yield,nitrogen agronomic efficiency,nitrogen use efficiency and water use efficiency under sufficient water conditions.Nitrogen treatment in high water(3000 m3·hm-2,N 120 kg·hm-2)is beneficial to high yield,high quality and the high efficiency of water and fertilizer utilization,and it is the optimum water and nitrogen management measure for the biomass production of switchgrass in Yinbei saline-alkali region of Ningxia.

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常雯雯,刘吉利,吴娜,何海锋.水氮耦合对盐碱地柳枝稷生物质产量、品质及水肥利用的影响[J].中国土壤与肥料,2021,(1):53-62.

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  • 收稿日期:2019-11-15
  • 最后修改日期:
  • 录用日期:2020-05-15
  • 在线发布日期: 2021-03-18