High efficient organic modifier for acidic soil

A technology of acidic soil and improver, which is applied in the direction of organic fertilizers, soil conditioning materials, special forms of dry distillation, etc. It can solve the problems of reducing the improvement effect of organic materials on soil acidity, the improvement effect is not long-lasting, and it is easy to be decomposed by microorganisms. Rich, improved effect, efficient production effect

Inactive Publication Date: 2010-04-07
INST OF SOIL SCI CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to directly add plant stalks to acidic soil, and the ammonium nitrogen nitrification process produced by organic nitrogen mineralization will reduce the improvement effect of organic materials on soil acidity; and organic matter is easily decomposed by microorganisms after being added to soil, making it The improvement effect can not be long-term and other two problems, looking for a new type of high-efficiency acidic soil organic amendment prepared from plant straw as raw material, used to increase the pH of acidic soil, thereby improving the comprehensive productivity of acidic soil

Method used

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  • High efficient organic modifier for acidic soil
  • High efficient organic modifier for acidic soil
  • High efficient organic modifier for acidic soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Preparation of improver——Pea stalks or peanuts and soybean stalks are dried and crushed, and then the crushed plant materials are put into a ceramic crucible, covered with a crucible lid, heated to 350°C in a muffle furnace, and kept Keep the temperature constant for 4 hours, turn off the power supply of the muffle furnace, take out the sample after natural cooling, and then prepare the high-efficiency acidic soil organic amendment. Using the same method, non-legume plant materials such as wheat straw, rice straw and rice bran were used as raw materials to prepare biochar for comparative research. Add 1 g of leguminous crop stalk raw material (dry weight) and the high-efficiency acidic soil organic amendment made from the same amount of raw material to 20 ml of deionized water to measure the pH. From attached figure 1 It can be seen that after low-temperature carbonization of three kinds of leguminous crop straws to prepare high-efficiency acidic soil organic amendment...

Embodiment 2

[0019] The preparation of modifier——with embodiment 1.

[0020] The improvement effect of red soil in Anhui - the dosage and experimental method are the same as in Example 1, and the experimental results are shown in the appendix Figure 4 . The results showed that when cultivated for 45 days, the soil pH of peanut straw charcoal, soybean straw charcoal and pea straw charcoal treatment increased by 0.62, 0.54 and 0.4 respectively compared with the control group. Good improvement effect.

Embodiment 3

[0022] Preparation of improver—Using or slightly modifying and adjusting the existing ordinary mechanism charcoal equipment and technology, drying and crushing pea straw or peanut and soybean straw, putting them in a heating furnace, and treating them at about 350°C The raw materials are subjected to indirect heating, dry distillation and carbonization, and the temperature is kept constant for about 4 hours, and then naturally cooled to obtain a high-efficiency acidic soil organic amendment. If the heating temperature is too high and the heating time is too long, the yield of the finished product will be reduced, the alkali content of the biochar will decrease, and more energy will be consumed ( Figure 5 and Figure 6 ); the heating temperature is too low, the heating time is too short, the carbonization of the finished product is not sufficient, and the improvement activity and improvement effect of the finished product will be correspondingly reduced ( Figure 6 and Figu...

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Abstract

A high efficient organic modifier for acidic soil is prepared by taking crop straws as raw materials and is characterized by the steps of drying and crushing straws of legume crops, putting into a heating furnace, and carrying out indirect heating for dry distilling and charring at 350 DEG C for four hours. The high efficient organic modifier for acidic soil is completely made from crop straws without any other matters added, is processed and prepared by employing prior equipment and technology, and features abundant raw materials and convenient preparation.

Description

1. Technical field [0001] The invention belongs to the technical field of preparation of soil improvement and soil conditioning materials, and relates to the technology of preparing high-efficiency acidic soil organic modifier by low-temperature carbonization of leguminous plant straws. 2. Background technology [0002] Acidic soils have low pH and high reactive aluminum, which are the limiting factors affecting the growth and yield of crops on this type of soil. The traditional method of improving acidic soil is to neutralize soil acidity and increase soil pH by adding alkaline substances such as lime, but this requires the consumption of additional mineral resources. [0003] Studies in recent years have found that agricultural waste such as plant straws and green manure can improve soil acidity, especially leguminous plant straws, which contain more alkaline substances and organic nitrogen, have been observed in short-term experiments. Acidity has obvious improvement (Po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/00C10B53/02C09K109/00
CPCY02E50/14Y02E50/10
Inventor 徐仁扣袁金华李九玉
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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