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Improvement method of sandy clay loam saline-alkaline soil

A saline-alkali soil and soil technology is applied in the improvement field of sandy clay loam saline-alkali soil, and achieves the effects of hindering the rise of capillary water, low production cost and wide source of raw materials

Inactive Publication Date: 2018-04-17
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for improving sandy-clay loam saline-alkali soil in order to solve the problem that there are few effective and durable improvement methods for sandy-clay loamy saline-alkali soil in the prior art

Method used

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  • Improvement method of sandy clay loam saline-alkaline soil
  • Improvement method of sandy clay loam saline-alkaline soil
  • Improvement method of sandy clay loam saline-alkaline soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Take soil samples from the plow layer (0-20cm) in the sandy clay loamy saline-alkali soil area to be improved, and analyze the mechanical composition after air drying (see Table 1). The soil bulk density is 1.32g / cm 3 . Take iron tailing sand samples and analyze the mechanical composition (see Table 2).

[0038] Table 1. Mechanical composition of sandy clay loamy saline-alkali soil

[0039] Particle size classification

<0.002mm

0.002≤~<0.05mm

0.05≤~<2mm

content(%)

21.1

26.6

52.3

[0040] Table 2. Mechanical composition of iron tailings

[0041] Particle size classification

<0.002mm

0.002≤~<0.05mm

0.05≤~<2mm

content(%)

8.4

68.2

23.4

[0042] Select 30m in the area to be improved 2 After the plot is leveled, add 850kg of iron tailings sand to the soil according to the formula (1) and (2), and mix it evenly with the plow layer soil (depth 20cm), and set the control plot 1 (30m 2 , with...

Embodiment 2

[0050] The mechanical composition of the plow layer soil in the sandy clay loamy saline-alkali soil area to be improved is the same as Table 1, and the soil bulk density is 1.32g / cm 3 . The mechanical composition of iron tailings is the same as Table 2.

[0051] Mix iron tailings with hydrolyzed polymaleic anhydride with a molecular weight of 400-800, a solid content of 48-50%, and a 1% aqueous solution with a pH of 2-3, stir evenly, adjust the pH of the iron tailings to 6.0, and obtain modified iron tailings sand.

[0052] Select 30m in the area to be improved 2 After the plot is leveled, add 850kg of modified iron tailings sand to the soil according to the formula (1) and (2), and then mix it evenly with the plow layer soil (20cm depth), and set the control plot 1 (30m 2 , undisturbed soil), control plot 2 (30m 2 , adding iron tailings without adding organic acid) for farming, the planting crop is corn, and other planting operations and management are the same as those i...

Embodiment 3

[0060] Take the dewatered sludge with a water content of 80%±5 and a pH of 8.5±0.5 from a domestic sewage treatment plant and mix it evenly with corn straw powder to control the C / N ratio of 25 to 35:1. After composting, the sludge with a water content of 25.7% and a pH of 8.3 is obtained Decomposed sludge.

[0061] The mechanical composition of the plow layer soil in the sandy clay loamy saline-alkali soil area to be improved is the same as Table 1, and the soil bulk density is 1.32g / cm 3 . The mechanical composition of iron tailings is the same as Table 2. Select 30m in the area to be improved 2 After leveling the plot, add 850kg of iron tailings to the soil according to formula (1) and (2), mix evenly with the plow layer soil, then add 60kg of decomposed sludge, mix evenly with the mixed soil, and let it stand for a month , set control plot 1 (30m 2 , undisturbed soil), according to plot 2 (30m 2 , adding decomposed sludge but no iron tailings sand), control plot 3 (30...

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Abstract

The invention aims to solve the problem that there is few study on effective and lasting improvement methods of sandy clay loam saline-alkaline land in the prior art and provides an improvement methodof sandy clay loam saline-alkaline soil. Improver iron tailings are added into the sandy clay loam saline-alkaline soil, and the iron tailings are utilized to change proportion of sand, powder and clay particles in sandy clay loam and reasonably adjust texture composition to modify the sandy clay loam saline-alkaline soil into loam, so that a lot of capillary pores can be retained, a lot of non-capillary pores and macrocracks can be formed, permeability is improved, water draining and salt washing are facilitated, capillary water can be blocked from going up, salt accumulation is reduced, andsoil salinity can be lowered effectively; by adding organic acid, composted sludge or composted biogas residue, compatibility between iron tailings sand and natural soil is improved, differential settlement and stratification in the process of saline-alkaline soil improvement are avoided or reduced to form soil structure uniform in texture, and lasting improvement of the saline-alkaline soil andstability of soil texture are realized.

Description

technical field [0001] The invention belongs to the technical field of saline-alkali soil improvement, in particular to a method for improving sandy-clay loamy saline-alkali soil. Background technique [0002] Land is the basic natural resource on which human beings depend, and it is the result of the comprehensive effects of topography, climate, hydrogeological conditions and human activities. The area of ​​saline-alkali soil in my country is huge, and saline soil is distributed from the tropics to the cold temperate zone, from the coast to the inland, and from the lowland to the plateau. The saline-alkali soil distribution area is determined according to its soil type and climate conditions, and is divided into four major categories: coastal saline area, Huanghuai-Hai plain saline area, desert and desert grassland saline area, and grassland saline area. The physical and chemical properties of saline soil are poor. The main performance is that the salinity or alkalinity is...

Claims

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Application Information

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IPC IPC(8): A01B79/02A01G22/20C09K17/40C09K109/00
CPCA01B79/02C09K17/40C09K2109/00
Inventor 邵安林刘润华马旭峰赵虹
Owner ANSTEEL GRP MINING CO LTD
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