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Straw liquefied liquid for improving soil, preparation method thereof and soil improving method

A technology for improving soil and liquefied liquid is applied in the field of straw liquefied liquid and liquefied liquid preparation and soil improvement. , the effect of reducing the harm

Active Publication Date: 2016-09-28
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fermentation method takes a long time; while the biochar fertilizer method not only loses a large amount of organic matter in the straw and reduces the utilization rate of the straw, but also because the biochar itself is alkaline, its use in saline-alkali soil will be limited

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0036] A method for preparing soil-improving straw liquefaction liquid, comprising the following steps:

[0037] A. Cut the straw to a length of 1-20cm;

[0038] B. Put the cut straw into the reactor, and add water according to the mass ratio of straw to water 1:10-1:50, the volume after adding water is not more than 1 / 2 of the volume of the reactor;

[0039] C. Close the feeding port of the reactor and start the heating device;

[0040] D. Heat the reactor to 200-320°C, and control the pressure inside the reactor at 10-15PMa;

[0041] E. Constant temperature for 0.1~2h;

[0042] F, close the reactor heating device;

[0043] G, open reactor cooling device, be cooled to room temperature;

[0044] H. Release the straw liquefaction liquid through the discharge port of the reactor;

[0045] I. Analyze and measure the pH value, N, P, K, and organic matter content of the straw liquefaction liquid;

[0046] J. Detect the pH value, N, P, K, and organic matter content of the unim...

Embodiment 1

[0052] Choose agricultural waste corn stalks as raw materials, cut 15g corn stalks to grow 20cm; put the cut corn stalks and 500g water into a closed reaction kettle to liquefy, control the temperature at 320°C, and control the pressure at 15PMa. The holding time is 0.5h. After cooling, straw liquefaction liquid is obtained;

[0053] The pH value of the straw liquefaction liquid was found to be 3.80 after analysis, and the contents of nitrogen, phosphorus, potassium and organic matter were 1948.0mg / kg, 422.4mg / kg, 52000.0mg / kg and 26.5g / kg respectively.

[0054] Stir and mix 200ml of corn straw liquefaction solution with 1kg of saline-alkali soil in central and western Jilin Province. The pH value of the improved saline-alkali soil changed from 8.65 to 6.72; the nitrogen content increased from 18.84mg / kg to 86.12mg / kg, phosphorus The content increased from 15.95mg / kg to 24.50mg / kg, and the potassium content increased from 136.80mg / kg to 1451.25mg / kg. The germination rate of w...

Embodiment 2

[0056] Choose agricultural waste corncobs as raw materials, cut 15g corncobs to grow 1cm; put the cut corncobs and 500g water into a closed reaction kettle for liquefaction, control the temperature at 260°C, control the pressure at 13PMa, and hold the time for 0.1h , to obtain corn cob liquefaction liquid after cooling;

[0057] After analysis, the pH value of the liquid phase is 3.20, and the contents of nitrogen, phosphorus, potassium, and organic matter are 2280.0mg / kg, 420mg / kg, 21000.0mg / kg, and 27.4g / kg, respectively.

[0058] Taking every 100ml of corncob liquefaction solution to improve 1.5kg of saline-alkali soil in central and western Jilin Province as an example, the pH value of the improved saline-alkali soil changed from 8.25 to 7.33; the nitrogen content increased from 45.22mg / kg to 186.88mg / kg; Phosphorus content increased from 29.74mg / kg to 54.12mg / kg; Potassium content increased from 60.81mg / kg to 1431.25mg / kg, the germination rate of planted wheat was change...

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Abstract

The invention relates to a straw liquefied liquid for improving soil, a preparation method thereof and a soil improving method. Crop straws adopted as a main raw material are liquefied in water under certain conditions according to a certain mass ratio without any catalyst, and the straw liquefied liquid and soil are mixed and stirred, or the straw liquefied is directly sprinkled or irrigated. The method only adopts water as a medium to liquefy the straws without any catalyst, the straw liquefied liquid has soil acidity-alkalinity improving and nutrition supplementing functions, and can be applied to balance the acidity and the alkalinity of the soil, supply N, P, K and other organic matter nutrients, promote growth of crops and improve the output. The straw liquefying method has the advantages of simplicity, wide applicability, great reduction of the application amount of chemical fertilizers, reduction of straw burning, and reduction of environment pollution induced by straw burning. The straw liquefied liquid can kill harmful pathogens left on straws, and reduces harms of the harmful pathogens carried by the straws to subsequent cultivation.

Description

technical field [0001] The invention relates to a liquefied liquid agent for soil improvement and an improvement method, in particular to a straw liquefied liquid for soil improvement and the preparation of the liquefied liquid and a method for improving soil. Background technique [0002] The world produces about 100-200 billion tons of crop straw every year, and our country produces more than 700 million tons of crop straw every year. At present, straw is mainly used in fertilizer, feed, energy, industrial raw materials and deep processing. However, there are still many problems in large-scale utilization of straw due to its light weight and large volume, which lead to high transportation costs and limitations in development technology. Due to the lack of mobilization of farmers' enthusiasm in terms of economic benefits, a large amount of straw was burned, which not only reduced the economic performance of straw, polluted the environment, but also caused local fires due t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05F11/00B09C1/08C05G3/80
CPCB09C1/08C05F11/00C05G3/80C05G5/20
Inventor 高岩屈兵兵崔学军李俊锋王洪艳
Owner JILIN UNIV
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