Method for matching and applying nitrification inhibitor and biomass carbon to improve nitrogen fertilizer utilization rate and application thereof

A technology of nitrification inhibitor and biochar, applied in application, fertilization device, climate change adaptation, etc., can solve the problem of unsustainable nitrification inhibition effect

Inactive Publication Date: 2013-03-27
INST OF SOIL SCI CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the leaching loss of the nitrification inhibitor itself, its inhibitory effect on the nitrification reaction cannot be sustained (Bremner et al., 1978. Soil Biol. Biochem.), which is why the nitrification inhibitor is used in tropical, One of the reasons

Method used

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  • Method for matching and applying nitrification inhibitor and biomass carbon to improve nitrogen fertilizer utilization rate and application thereof
  • Method for matching and applying nitrification inhibitor and biomass carbon to improve nitrogen fertilizer utilization rate and application thereof
  • Method for matching and applying nitrification inhibitor and biomass carbon to improve nitrogen fertilizer utilization rate and application thereof

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Experimental program
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Effect test

Embodiment 1

[0026] Weigh 50g of 20-mesh red soil (collected from Langxi County, Anhui) into a set of plastic tubes, and add 50mg dicyandiamide / kg soil, 50mg dicyandiamide / kg soil+50g biochar / kg soil, 200mg N / kg soil urea, 200mg N / kg soil urea+50mg dicyandiamide / kg soil, 200mg N / kg soil urea+50mg dicyandiamide / kg soil+50g biochar / kg soil, 400mg N / 8 combinations of urea in kg soil, urea in 400 mg N / kg soil + 50 mg dicyandiamide / kg soil, urea soil in 400 mg N / kg soil + 50 mg dicyandiamide / kg soil + 50 g biochar / kg soil . After fully mixing soil, nitrogen fertilizer, biochar and dicyandiamide, adjust the water content to 60% of the field water holding capacity, and cultivate at a constant temperature of 30°C. The samples were leached with 25mL of deionized water, and the leached soil samples were continuously cultivated in the constant temperature incubator, and the ammonium nitrogen and nitrate nitrogen in the leaching solution were measured respectively.

[0027] Because the soil contain...

Embodiment 2

[0030] The method for improving the nitrogen utilization rate of dry crops by combined application of nitrification inhibitors and biochar is as follows: Dicyandiamide and peanut straw charcoal are mixed and applied to the surface soil, and fully mixed with the soil. Chemical fertilizers are required. Wherein when the application rate of ammonium or amide nitrogen fertilizer is 200-400mgN per kilogram of soil, the application rate of dicyandiamide is 5-50mg per kilogram of soil, and the application rate of peanut straw charcoal is 5-50g per kilogram of soil. The peanut straw charcoal is biomass charcoal fired at 300°C. by attaching Figure 3-6 It can be seen that nitrogen leaching loss can be reduced by about 66.0%.

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Abstract

The invention provides a method for matching and applying a nitrification inhibitor and biomass carbon to improve a nitrogen fertilizer utilization rate and an application thereof. The method is characterized by comprising the following steps of: smoldering crop straws to prepare the biomass carbon; and mixing dicyandiamide and the biomass carbon and applying the mixture into soil; and adding an ammonium nitrogen fertilizer. When the application amount of an ammonium state or an amide state is 200-400 mgN per kg of soil, the utilization amount of the dicyandiamide is 5-50 mg/kg and the utilization amount of the biomass carbon is 50 g per kg of the soil. The method comprises the following specific application steps of: mixing the biomass carbon and the dicyandiamide and applying the mixture on surface-layer soil to be sufficiently mixed with the soil; and then, applying a chemical nitrogen fertilizer according to a conventional method. The method utilizes the characteristic that the biomass carbon has the very strong adsorption capability on the nitrification inhibitor and the dicyandiamide; before a chemical fertilizer is applied, the biomass carbon and the dicyandiamide are mixed and applied into the soil; and the keeping time of the dicyandiamide in the soil is improved and the inhibition effect of a nitration reaction of converting ammonium nitrogen to nitrate nitrogen is prolonged, so that the leaching loss of nitrogen is reduced and the nitrogen fertilizer utilization rate is improved.

Description

technical field [0001] The invention belongs to the field of compound fertilizer development, and relates to the combined application of nitrification inhibitors and biomass charcoal to reduce nitrogen leaching loss and improve the utilization rate of nitrogen fertilizer. Background technique [0002] The amount of nitrogen fertilizer applied to farmland soil in the rice-wheat rotation area of ​​Taihu Lake can reach 500-600kg N / ha per year (Xing et al., 2001. Sci.China Ser.B), and under the condition of protected cultivation, the amount of nitrogen fertilizer can even be as high as 1000kg N / ha ( Jiang Huimin et al., 2010. Journal of Agricultural and Environmental Sciences), while the utilization rate of nitrogen fertilizer in my country's farmland is often only about 30% (Zhu Zhaoliang, 1992. Science Press), and decreases with the increase of nitrogen fertilizer application (Jiang Jun et al., 2005. Nanjing Agricultural University Journal). After nitrogen fertilizer is applied...

Claims

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Application Information

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IPC IPC(8): C05G3/08C05G3/90
CPCY02P60/21Y02A40/22
Inventor 姜军徐仁扣钱薇
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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