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Combined soil additive, preparation method and combined application method

A soil additive and soil technology, which is applied in land preparation methods, soil conditioning materials, chemical instruments and methods, etc., can solve the problems of high content of heavy metals in organic fertilizers, excessive heavy metals in soil, and reduce economic benefits, and achieves reduction of nitrate nitrogen content, The effect of improving soil properties and promoting crop yields

Active Publication Date: 2015-07-22
JIANGSU ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these measures have many deficiencies. For example, the reduction of fertilizer must be appropriate, which will inevitably lead to crop yield reduction and lower economic benefits; the heavy metal content of organic fertilizer is high, and it is easy to cause heavy metals in the soil to exceed the standard after being applied to the soil; straw mulching may reduce crop yields and increase soil CO 2 emissions of greenhouse gases such as methane
On the whole, there is still a lack of reasonable technical means in the existing technology, which can not only achieve better nitrogen and phosphorus emission reduction effects, but also try to avoid other negative effects (such as production reduction, heavy metal pollution, etc.)

Method used

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  • Combined soil additive, preparation method and combined application method
  • Combined soil additive, preparation method and combined application method
  • Combined soil additive, preparation method and combined application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] In this embodiment, the combined soil additive is prepared first, and then it is applied to the growth of wheat for compound application. Specifically include:

[0046] (1) Preparation of biochar: place the biomass material wheat straw in a calciner or muffle furnace at 300-700°C, and burn it under anoxic conditions (nitrogen atmosphere), and cool the burned biochar naturally reserve;

[0047] (2), take by weighing the biochar of soil dry weight 0.1%-5wt%, stand-by;

[0048] In the present embodiment, the soil is collected from the Taihu Lake Basin (Suzhou Wangting), and the main physical and chemical indicators of the soil are as follows:

[0049] Table 1 Physical and chemical properties of the tested soil

[0050]

[0051] It can be seen from Table 1 that the soil in this example is slightly acidic. According to the above, a relatively large amount of biochar needs to be applied. Therefore, the application amount of biochar in the present invention is finally se...

Embodiment 2

[0057] This embodiment is similar to the embodiment 1. First, the combined soil additive is prepared, and then it is applied to the growth of wheat for compound application. Specifically include:

[0058] (1) Preparation of biochar: put the biomass material rapeseed in a calcination furnace or a muffle furnace at 300-700°C, and burn it under anoxic conditions (nitrogen atmosphere), and cool the burned biochar naturally for backup use;

[0059] (2), weigh 0.1% biochar by soil dry weight, and set aside; the soil in this embodiment is alkaline soil, therefore, the application amount of biochar in the present invention is less.

[0060] (3), according to the nitrogen application amount in the soil, take by weighing the nitrification inhibitor of pure N mass 0.5%-10%, stand-by; The nitrification inhibitor involved in this embodiment is acetylene, and its addition amount is 1% of the pure N mass %.

[0061] (4) Deeply or shallowly apply the biochar prepared in step (2) to the soi...

Embodiment 3

[0065] This embodiment is similar to the embodiment 3, the combined soil additive is prepared first, and then it is applied to the growth of wheat for compound application. Specifically include:

[0066] (1) Preparation of biochar: put the biomass material rapeseed in a calcination furnace or a muffle furnace at 300-700°C, and burn it under anoxic conditions (nitrogen atmosphere), and cool the burned biochar naturally for backup use;

[0067] (2), take 5% biochar of soil dry weight, stand-by; The soil of the present embodiment is acidic soil, therefore, the applied amount of biochar among the present invention is more.

[0068] (3), according to the amount of nitrogen applied in the soil, take by weighing the nitrification inhibitor of pure N mass 0.5%-10%, stand-by; The nitrification inhibitor involved in this embodiment is DMPP, and its addition is 10% of pure N mass %.

[0069] (4) Deeply or shallowly apply the biochar prepared in step (2) to the soil; in this embodiment...

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Abstract

The invention discloses a combined soil additive composed of biological carbon and a nitrification inhibitor and a preparation method of the combined soil additive, wherein the combined soil additive are subjected to combined application under certain conditions to achieve the purposes of: 1) promoting the increase of aboveground biomass and yield of wheat, wherein the pot experiment shows that the wheat yield subjected to the combined application is respectively 80%, 65% and 103% higher than the wheat yield subjected to the single application of biological carbon, the single application of nitrification inhibitor and the application of no additive in the control treatment; 2) promoting the absorption and utilization of wheat to nitrogen, improving the nitrogen fertilizer use efficiency, wherein the pot experiment shows that the nitrogen harvest index compared with the control treatment without applying the additive is increased by 22%; 3) reducing the TN concentration in a runoff liquid and a leakage liquid as well as the TP concentration in the runoff liquid, so as to reduce the loss of nitrogen and phosphorus, avoid environmental pollution to the greatest extent; the combined soil additive has good economic and social benefits, and provides a useful reference for guiding the agricultural production.

Description

technical field [0001] The invention relates to a combined soil additive, a preparation method and a combined application method thereof, which can increase wheat yield and reduce nitrogen and phosphorus loss, and belong to the fields of soil improvement and non-point source pollution control. Background technique [0002] Agricultural non-point source pollution is one of the main reasons for the deterioration of the water environment in the basin. Taking Taihu Lake as an example, the proportion of agricultural non-point source pollution to the total nitrogen entering the lake is 34%-52%, and the proportion of total phosphorus is 17%-54%. [0003] At present, the research on the source control of agricultural non-point source pollution mainly focuses on the management mode of nitrogen fertilizer and the mode of land management, which are embodied in: (1), reduced fertilizer application, combined application of organic and inorganic fertilizers, and the application of slow and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40A01B79/00C09K101/00C09K109/00
Inventor 薛利红潘复燕冯彦房俞映倞杨林章
Owner JIANGSU ACAD OF AGRI SCI
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