Rapid improving method for soil nutrient storage capacity and soil fertility of saline-alkali farmland in irrigation area

A soil nutrient and farmland technology, which is applied to the rapid improvement of soil nutrient storage capacity and soil fertility in severe saline-alkali farmland, in irrigation areas, in the field of saline-alkali land soil improvement and fertilization, and can solve problems such as poor soil physical and chemical properties, high cost, and poor basic soil fertility. Achieve long-term reduction of salinity barriers, reduce leaching of available nutrients, and increase soil nutrient conservation.

Active Publication Date: 2021-02-02
INST OF SOIL SCI CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Technical problem to be solved: the present invention aims at secondary obstacles such as poor physical and chemical properties of saline-alkali farmland soil, barren nutrients, and poor soil fertility, as well as the high cost, low efficiency, and A series of practical problems such as serious nutrient depletion provide a method for rapid improvement of soil nutrient storage capacity and soil fertility in saline-alkali farmland in irrigated areas

Method used

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  • Rapid improving method for soil nutrient storage capacity and soil fertility of saline-alkali farmland in irrigation area
  • Rapid improving method for soil nutrient storage capacity and soil fertility of saline-alkali farmland in irrigation area
  • Rapid improving method for soil nutrient storage capacity and soil fertility of saline-alkali farmland in irrigation area

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Effect test

Embodiment 1

[0039] Severe saline-alkali obstacle cultivated land in Hetao Plain, Inner Mongolia. The soil salinity in the 0-20cm plow layer of the test plot is 3.9-7.4g / kg, the pH is 8.51, the average organic matter content is 10.13g / kg, the total nitrogen is 0.54g / kg, the alkaline nitrogen is 37.6mg / kg, and the available phosphorus is 11.2mg / kg, available potassium 193.5mg / kg. Location: Chengni Village, Sandaoqiao Town, Hangjinhou Banner, Bayannur City, Inner Mongolia. In July 2017, soil samples of 0-20 cm from the surface layer of saline-alkali cultivated land were collected as test soil. The test period was from July 2017 to October 2017. The average salt content of the tested soil is 5.82g / kg, which belongs to the chloride ion-sulfate type saline soil, the texture is clay loam, and the previous crop is sunflower. The soil column simulation test method is adopted, and the main implementation steps are as follows:

[0040] (1) Soil column filling: the soil column height is 150cm, the...

Embodiment 2

[0046] Severely saline-alkali land in Hetao Plain, Inner Mongolia. The soil salinity in the 0-20cm plow layer of the test plot is 4.3-6.9g / kg, the pH is 8.33, the average organic matter content is 9.71g / kg, the total nitrogen is 0.46g / kg, the alkaline nitrogen is 31.7mg / kg, and the available phosphorus is 9.8mg / kg, available potassium 204.6mg / kg, clay content 16.8%, texture is clay loam. Location: Minjian Village, Toudaoqiao Town, Hangjinhou Banner, Bayannur City, Inner Mongolia. In August 2017, soil samples of 0-20 cm in the plow layer were collected, air-dried and ground through a 10-mesh sieve as test soil. The test time was August 2017 ~October 2017. The average salt content of the tested soil is 5.49g / kg, which belongs to the chloride ion-sulfate type saline soil, and the previous crop is sunflower. The indoor constant temperature cultivation test method is adopted, and the main implementation links are as follows:

[0047] (1) The main test treatments include:

[00...

Embodiment 3

[0074] Moderate saline-alkali land in the Hetao irrigation area of ​​Inner Mongolia, the average soil salinity in the 0-20cm plow layer is 3.44g / kg, the pH is 8.36, the organic matter is 7.44g / kg, the total nitrogen is 0.43g / kg, the total phosphorus is 0.76g / kg, and the soil NH 4 + -N content 2.68mg / kg, NO 3 - -N content is 13.28mg / kg, the soil texture is sandy loam, and the average soil bulk density of the plow layer is 1.41g / cm 3 . Location: The experimental demonstration area of ​​"50,000 mu of changing salt, increasing grass and promoting animal husbandry" in Rongyi Village, Longxingchang Town, Wuyuan County, Inner Mongolia. The test time is from June 2018 to September 2018. The potted cultivation test method is adopted in the greenhouse carried out in-house, air-dry the plow layer soil samples collected in the field, grind and sieve, and measure according to 1.4g / cm 3 Carry out filling, the bottom of the pot is open, the upper opening is 25cm wide, the bottom is 18cm ...

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Abstract

The invention discloses a rapid improving method for soil nutrient storage capacity and soil fertility of saline-alkali farmland in an irrigation area. The rapid improving method comprises the steps that straw and lignin fibers are evenly spread on the surface layer of the saline-alkali farmland after autumn harvest, deep ploughing and pressing burying are carried out to form a biomass interlayer,and upturned soil is sunned for overwintering; irrigating salt leaching is carried out in spring, a mixture of modified zeolite, medical stone, nanoscale zero-valent iron (nZVI), AM fungal inoculum and water-soluble polymer polyacrylamide (PAM) is spread, meanwhile, base fertilizer is applied according to soil texture, and rotary tillage and film mulching are carried out; and sole cropping, intercropping or multiple cropping of green manure are carried out, and ploughing, pressing and returning to the field are carried out, and the steps are cyclically used at regular intervals. According tothe rapid improving method for soil nutrient storage capacity and soil fertility of the saline-alkali farmland in the irrigation area, saline-alkali obstacles can be reduced for a long time, the soilagglomeration process is accelerated, the soil nutrient storage is increased, the soil carbon pool accumulation is promoted, and the multi-process mutual feedback synergistic promotion is realized.

Description

technical field [0001] The invention belongs to the field of agriculture and ecology, and in particular relates to a method for soil improvement and fertilization of saline-alkali land, in particular to a method for rapid improvement of soil nutrient storage capacity and soil fertility of medium and severe saline-alkali farmland in irrigation areas. Background technique [0002] The Yellow River Irrigation Area represented by the Hetao Irrigation Area is one of the concentrated areas of secondary saline-alkali soil in the arid area of ​​northern my country. It is also an important reserve land resource area, ecological barrier area and grain, cotton and oil production base in my country. The strategy of "storing grain in the ground and storing grain in technology" is of great significance to restore and rebuild ecologically fragile areas, build an important ecological security barrier in northern my country, and promote high-quality development in the Yellow River Basin. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/00A01B79/02A01C21/00A01G22/00A01G22/20A01G22/40C09K17/32C09K17/40C09K101/00
CPCA01B79/02A01B79/005A01G22/00A01G22/20A01G22/40A01C21/005C09K17/32C09K17/40C09K2101/00
Inventor 姚荣江杨劲松尹春艳赵举李红强王相平谢文萍
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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