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Improving method of cured saline-alkali soil by utilizing agricultural waste biomass carbide

A technology of agricultural waste and biochar, applied in agriculture, agricultural machinery and implements, machinery for lifting soil, etc., achieves the effect of low price, simple and easy method, and improved emergence rate and survival rate

Inactive Publication Date: 2012-04-11
NANJING AGRICULTURAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional saline-alkali soil improvement methods are costly and time-consuming, and are not suitable for large-scale improvement of saline-alkali soil
For example, the improvement of saline-alkali soil in coastal beaches generally requires ditches for drainage, spraying salt to refresh alkali, surrounding fields to store freshwater, planting reeds to raise fish, and then diverting water to grow rice, etc., which is costly and time-consuming, and does not conform to the rapid development of modern market-oriented agricultural production. need

Method used

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  • Improving method of cured saline-alkali soil by utilizing agricultural waste biomass carbide
  • Improving method of cured saline-alkali soil by utilizing agricultural waste biomass carbide
  • Improving method of cured saline-alkali soil by utilizing agricultural waste biomass carbide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Collect wheat stalks or corn stalks, air-dry or air-dry them so that their water content is less than 20%; then put them into a pool-type oxygen-limited thermal cracking carbonization furnace or a vertical kiln-type oxygen-limited thermal cracking carbonization furnace for carbonization at 300-500°C to obtain Biological black charcoal and mixed gas, after the mixed gas is passed through the dust collector to remove the solid dust, and then the mixed gas is separated through the condenser according to the freezing point of each gas to obtain wood vinegar, and then the bio-black charcoal is ground and passed Sieve, mix and homogenize to obtain biological black carbon with a particle diameter of -1 , wood vinegar 1.5t.ha -1 , mix bio-black charcoal and wood vinegar, and spread it evenly on the soil surface, and apply base fertilizer at the same time, the amount of base fertilizer is 112.5kg N ha -1 , 112.5kg P 2 o 5 ha -1 , 112.5 kg K 2 O. ha -1 , and then spread it ...

Embodiment 2

[0043] In the same place as Example 1, in the salinized surface-alkali soil with a salt content>0.5%, in early June 2011, 0.75t.ha of bio-black carbon with a particle diameter of -1 , wood vinegar 0.15t.ha -1 , mix bio-black charcoal and wood vinegar and spread evenly on the soil surface, apply base fertilizer at the same time, then evenly spread on the soil surface, then plow to 20cm deep, and rake it 0-20cm evenly, so that it is in line with the cultivated layer The soil is thoroughly mixed. The same area of ​​saline-alkali land without bio-black carbon and wood vinegar was used as a control, and the amount of fertilizer and cultivation method were the same as those of the experimental field. The topdressing, irrigation management and plant protection measures during the corn growth period are the same as the local management mode. During the growth period of corn, it was observed that the seedling emergence rate and survival rate of the fields applied bio-black charcoal an...

Embodiment 3

[0046] The application amount of the method for improving mature saline-alkali soil by using agricultural waste biomass carbonization products is 1.5t.ha of biological black carbon improver -1 , wood vinegar 0.3t.ha -1 . During the growth of corn, it was observed that the emergence rate and survival rate of corn in the fields applied with bio-black charcoal and wood vinegar could reach more than 70%, and the plant height was significantly higher than that in the field without charcoal application. The pH value is reduced, the soluble salt content of the soil is reduced, and there is almost no salt spot phenomenon.

[0047]

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Abstract

The invention provides an improving method of cured saline-alkali soil by utilizing agricultural waste biomass carbide. The method comprises the following steps: producing biological black wood charcoal and wood vinegar by straw thermal cracking carbonization; and applying a biological black wood charcoal and wood vinegar soil improving material. The method has the advantages and excellent effects that: the effect of improving saline-alkali soil is remarkable; before wheat is sown in moderate and severe saline sodium carbonate soil with salt content of 0.5-1.35%, the biological black wood charcoal modifier and the wood vinegar are applied to serve as base fertilizers, and the saline-alkali soil with a pH value more than 10 can be improved to be farmland which can be farmed in the same year, so that the yield of crops is greatly improved.

Description

[0001] technical field [0002] The invention belongs to the technical field of saline-alkali soil improvement, and mainly uses bio-black charcoal and wood vinegar, which are the main products obtained by pyrolysis and carbonization of crop straws, to improve soil salinity and soil compaction, so as to ensure the normal growth of wheat. The pyrolysis product biological black charcoal and wood vinegar are used to improve soil, and belong to the technical field of comprehensive utilization of resources. [0003] technical background [0004] Saline-alkali soil is a widely distributed soil type, and the global saline-alkali soil area accounts for about 25% of the total land area (Li Haifeng et al., 2002). my country's saline-alkali land is mainly distributed in the North China Plain, Northeast Plain, Northwest Inland and coastal areas. According to the investigation and estimation by the Natural Resources Comprehensive Investigation Committee of the Chinese Academy of Scienc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B77/00
Inventor 刘玉明潘根兴康全德林振衡李恋卿郑金伟张旭辉
Owner NANJING AGRICULTURAL UNIVERSITY
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