| 引用本文: | 杨博,屈忠义,孙慧慧,等.粉垄耕作对河套灌区盐碱地土壤性质的影响[J].灌溉排水学报,0,():-. |
| Yang Bo,Qu Zhongyi,Sun Huihui,et al.粉垄耕作对河套灌区盐碱地土壤性质的影响[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】探究粉垄耕作对河套灌区盐碱地土壤理化性质和生物学性质的影响。【方法】通过田间原位小区试验，设置粉垄耕作处理，以常规耕作为对照，取土壤样品并测定土壤水稳性团聚体、有机质、全氮量、微生物菌落数等指标，分析并比较粉垄处理和对照各指标在同一土壤深度下的显著差异性。【结果】 与常规耕作相比，粉垄耕作显著降低了0~40 cm深度土壤可溶性全盐含量及pH值； 粉垄耕作可显著降低土壤体积质量、增大土壤孔隙度并降低土壤三相比，尤其在20~30 cm深度的表现更为明显；粉垄耕作增加了0~40 cm深度土壤有机质、全氮及水稳性团聚体含量，且粒径在0.25~1 mm的团聚体量增加明显；粉垄耕作增加了0~40 cm深度土壤微生物菌落数，相比而言 20~40 cm深度的土壤微生物菌落数增加更显著。【结论】粉垄耕作可显著改善河套灌区盐碱地土壤理化生性质。 |
| 关键词: 粉垄耕作；土壤体积质量；土壤孔隙度；有机质；水稳性团聚体；土壤微生物 |
| DOI： |
| 分类号:S152.4 |
| 基金项目:内蒙古自治区科技计划项目(201702108)；国家自然科学(51869019) |
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| Effect of Smash Ridging on Soil Properties of Saline Alkali Land in Hetao Irrigation Area |
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Yang Bo, Qu Zhongyi, Sun Huihui, Yang Wei, Wang Liping, Liu Xia, Zhang Ruxin, Wang Qiyuan
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School of water conservancy and civil engineering,Inner Mongolia Agricultural University,Hohhot,010018
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| Abstract: |
| 【Background】Hetao Irrigation Area in Inner Mongolia is one of the areas with large area of saline soil in China. The area of saline alkali cultivated land in the whole irrigation area is about 394 000 hm2, accounting for 68.65% of the total cultivated land area. The problems of poor soil structure, high salt and pH value are common in the saline alkali land of Hetao irrigation area. Shallow tillage and ploughing all year round have great disturbance to the soil and will damage the soil structure; no tillage is beneficial to the soil water and fertilizer conservation, but long-term no tillage plus mechanical rolling will increase the soil bulk density, the bottom of the plow will become thick and move up, the soil viscosity is not conducive to the surface soil salt leaching, which will affect the emergence and growth of crops and severely limit the crop yield and agricultural development in this area.【Objective】 To explore the effect on the physical , chemical and biological properties of saline alkali soil in Hetao Irrigation Area.【Methods】Through the field in-situ plot test, the smash ridging treatment was set up, and the general cultivation was taken as the control. The soil samples were taken and the indexes such as soil water stable aggregates, organic matter, total nitrogen content and microbial colony number were determined. The significant differences between the smash ridging treatment and the general cultivation under the same soil depth were analyzed and compared. 【Results】（1）The total soluble salt content and pH value of the soil in 0~40 cm depth were significantly reduced by the smash ridging, and the content of soluble total salt in 0~40 cm depth soil decreased by 30.34%;（2）The bulk density, porosity and three-phase ratio of the soil were significantly reduced by the smash ridging, especially the depth of 20~30 cm, which was mainly related to that the smash ridging broke the dense bottom layer of the soil;（3）The smash ridging increased the content of soil organic matter, total nitrogen and water stable aggregate in 0~40 cm depth, and the aggregate with particle size of 0.25~1mm increased significantly; （4）Ridge tillage can increase the number of soil microbial colonies in 0 ~ 40cm depth, and it significantly increased the number of soil microbial colonies at the depth of 20~40 cm, which was mainly related to the breaking of the bottom of the soil plough by ridge tillage, increasing the soil porosity in 20-40cm depth, providing good living conditions for soil microorganisms, thus promoting the growth and propagation of microorganisms.【Conclusion】 Based on the above analysis, it can be concluded that smash ridging can significantly improve the physical , chemical and biological properties of saline alkali soil in Hetao irrigation area. |
| Key words: smash ridging; soil mass per unit volume; soil porosity; organic matter; water stable aggregate; soil microorganism |
