不同改良剂对碱化土壤性质及苜蓿生长的影响

发布时间：2018-10-19 20:22

【摘要】：内蒙古农业大学海流园区分布着大面积的盐碱土壤,在农业上一直得不到充分利用,所以对其改良势在必行。本研究采用田间试验及室内实验相结合的分析方法,通过使用有机肥(0)、复合肥(F)、改良剂T及生物改良剂E四种物质形成的12种改良措施对内蒙古海流园区的碱化土壤进行改良,系统的结合土壤性质及试验作物苜蓿的生长情况的变化,对12种改良措施做出效果评价,筛选找出最佳的改良措施。主要研究结果如下:(1)施用改良剂E后,土壤碱化度平均下降3.50%;土壤的全盐含量与CK相比,也呈现出一定的降低趋势,全盐含量平均下降了 0.77g/kg;改良后土壤pH的变化为,0-10cm 土层的pH从9.50降低到8.49,10-20cm 土层中的pH也从原来的9.49下降到了 8.62,土层20-30cm中的pH也下降了 0.37,所以施用改良剂E对土壤的改良有很好的效果。(2)从整体上来看,不同的改良方法有着不同程度的改良效果,按照各处理对改良效果大小的排序是处理E处理F+E处理O+T+F处理O+E+T+F处理T处理O+E处理E+T处理O+E+F处理F+T+E处理O+E+T处理O+T处理F+TCK。处理E的改良效果最显著,处理F+T的改良作用比较小。(3)施用改良剂后土壤有机质0-30cm 土层中的含量没有太大变化。而处理E和处理F+E对土壤中微生物碳的影响却非常明显,而且相比较于对照CK,处理E及处理F+E均达到了极显著水平。(4)各改良措施不仅对土壤性质有一定的改良效果,对种植的苜蓿也产生了一定的影响。首先苜蓿的出苗率在不同的改良措施下有了不同幅度的提高。苜蓿的株高在施用改良后也有不同幅度的增加。苜蓿的生物学产量也会随着改良方式的不同发生不同的变化,与对照CK比较,处理E对苜蓿的生物量增产47.899%,处理F+E增产42.84%,处理F+T是相对于其他处理增产最少,只有6.24%。通过本试验筛选得出的最佳改良措施是处理E,其在土壤和作物中都起到最佳的作用。
[Abstract]:There is a large area of saline-alkali soil in the current park of Inner Mongolia Agricultural University, which has not been fully utilized in agriculture, so it is imperative to improve it. In this study, the alkalized soil of Inner Mongolia Sea current Park was improved by 12 kinds of improvement measures, which were formed by organic fertilizer (0), compound fertilizer (F), modifier T and biological modifier E, by combining field experiment and laboratory experiment. Based on the changes of soil properties and the growth of alfalfa, the effects of 12 kinds of improvement measures were evaluated, and the best improvement measures were found out. The main results are as follows: (1) after the application of modifier E, the alkalinity of the soil decreased by 3.50 and the total salt content of the soil also showed a decreasing trend compared with that of CK. The average content of total salt decreased by 0.77 g / kg, and the change of pH in improved soil layer was that the pH of 0-10cm soil layer decreased from 9.50 to 8.49 ~ (10 ~ 20) cm soil layer, and the content of pH in soil layer was decreased from 9.49 to 8.62, and the pH content in soil layer was also decreased by 0.37. Soil improvement has a good effect. (2) from the overall point of view, Different methods of improvement have different degrees of improvement effect, According to the order of improvement effect of each treatment, treatment E, F, E, O T F, O E T F, O, E, T, E, E The improvement effect of treatment E was the most obvious, and that of treatment F T was relatively small. (3) the content of soil organic matter in 0-30cm soil layer did not change much after the application of modifier. However, the effect of treatment E and F E on soil microbial carbon was very obvious, and compared with control CK, treatment E and treatment F E, the effect of treatment E and F E on soil microbial carbon was very significant. (4) the improvement measures not only improved soil properties, but also improved soil properties. Alfalfa also has a certain impact on the planting of alfalfa. First of all, the emergence rate of alfalfa increased by different extent under different improvement measures. The plant height of alfalfa also increased by different extent after application. The biological yield of alfalfa also changed with the improvement way. Compared with control CK, treatment E increased alfalfa biomass 47.89999, treatment F E increased 42.84g, and treatment F T increased the yield by 6.24g compared with other treatments. The best way to improve the soil and crops is the treatment of E-, which plays the best role in both soil and crops.
【学位授予单位】：内蒙古农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S156.4;S541

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