河套地区盐碱土复合调理剂配方筛选研究
作者:
作者单位:

(1.内蒙古农业大学草原与资源环境学院,内蒙古 呼和浩特 010019;2.内蒙古自治区土壤质量与养分资源重点实验室,内蒙古 呼和浩特 010018)

作者简介:

王鼎(1989-),男,内蒙古巴彦淖尔人,博士研究生,主要研究方向为盐碱土资源利用与改良。E-mail:15147124612@163.com。

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基金项目:

基金项目:国家重点研发计划项目(2016YFC0501306)。


Study on the optimum formulation selection of compound conditioner for saline-alkali soil in Hetao area
Author:
Affiliation:

(1.College of Grassland,Resourcesand Environment,Inner Mongolia Agricultural University,Hohhot Inner Mongolia010019;2.Inner Mongolia KeyLaboratory of Soil Quality and NutrientResource,Hohhot Inner Mongolia010018)

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    摘要:

    以内蒙古河套灌区典型的盐碱土为研究对象,采用烟气脱硫石膏、腐殖酸、保水剂材料研发的复合调理剂对根区盐碱土进行综合改良,通过室内盆栽试验,分析不同配比烟气脱硫石膏型复合调理剂对土壤 pH值、碱化度、全盐、盐基离子含量、养分水平、含水量、硬度及向日葵出苗率的影响。结果表明:(1)不同比例施用烟气脱硫石膏型复合调理剂后土壤 pH值均显著降低,降低幅度 0.45~ 0.79个单位,土壤中 Na +和 CO 32-+HCO3 含量分别降低了 9.7%~ 20.1%和 14.3%~30.4%;(2)不同比例施用烟气脱硫石膏型复合调理剂后土壤有机质、碱解氮和含水量分别增加了 13.9%~119.3%、9.1%~ 159.2%和 4.4%~20.2%,土壤硬度降低了 13.4%~56.7%;(3)不同比例施用烟气脱硫石膏型复合调理剂后,向日葵出苗率从 6.7%增加到了 20.0%~ 66.7%;通过对盐碱土综合改良效果及向日葵出苗率进行分析,烟气脱硫石膏型复合调理剂的最优配方为烟气脱硫石膏 2 580 kg·hm -2、腐殖酸 774 kg·hm -2、保水剂 516 kg·hm -2。

    Abstract:

    Taking the typical saline-alkali soil in Hetao Irrigation District of Inner Mongolia as the researchobject,the comprehensive improvement effects of compound conditioner formulations made by different proportions of flue gasdesulfurization(FGD)gypsum,humic acid and super absorbent polymer on saline -alkali soil in the root zone of crop growthwere explored by potexperiments.The soilpH,alkalinity,totalsalt,water -soluble saltions,nutrientcontents,moisture, hardness of saline-alkali soil and the germination rate of sunflower were compared and analyzed.The results showedthat:(1)After applying FGD gypsum compound conditioners in different proportions,the soil pH was significantly reduced by 0.45~0.79units,and the content of Na + and CO32-+HCO3-were reduced by 9.7%~ 20.1% and 14.3%~30.4%,respectively.(2)Soil organicmatter,available nitrogen and water content increased by 13.9%~119.3%,9.1%~ 159.2% and 4.4%~20.2%respectively,soil hardness decreased by 13.4%~ 56.7% after applying FGD gypsum compoundconditioner in differentproportions.(3)Sunflower germination rate increased from 6.7% to 20.0%~ 66.7% after applyingFGD gypsum compound conditioner in differentproportions.By analyzing the comprehensive improvement effects on saline -alkali soil and the germination rate ofsunflower,the optimal formula of FGD gypsum compound conditioner was FGD gypsum 2 580 kg·hm-2,humic acid 774 kg·hm -2,super absorbent polymer 516 kg·hm -2.

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王鼎,李跃进,李青春,王丹斓,余雅婧.河套地区盐碱土复合调理剂配方筛选研究[J].中国土壤与肥料,2020,(4):192-201.

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  • 收稿日期:2019-12-31
  • 最后修改日期:
  • 录用日期:2020-02-21
  • 在线发布日期: 2020-09-14