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Technology for reducing gaseous nitrogen loss after urea application in degraded alpine meadow

A technology of gaseous nitrogen and urea, applied in urea compound fertilizer, nitrogen fertilizer, fertilization method and other directions, can solve problems such as weakening of inhibition effect, and achieve the effect of reducing harm, low cost and suitable for promotion

Pending Publication Date: 2022-01-21
QINGHAI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Some related experiments also proved that the inhibitory effect of HQ on urease is time-dependent, and the inhibitory effect will gradually weaken over time

Method used

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  • Technology for reducing gaseous nitrogen loss after urea application in degraded alpine meadow
  • Technology for reducing gaseous nitrogen loss after urea application in degraded alpine meadow
  • Technology for reducing gaseous nitrogen loss after urea application in degraded alpine meadow

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Experimental program
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Effect test

Embodiment 1

[0033] Step 1. Experimental design and processing;

[0034] The test plot was established in June 2018. A typical degraded alpine meadow plot was selected in Dawu Town, Maqin County, Guoluo Prefecture. A total of 5 groups of treatments were designed for the plot, and each group had 3 replicates, a total of 15 district. The area of ​​each plot is 2m×3m=6m 2 , each cell is spaced 1.5m apart.

[0035] Set separately: ① No fertilization treatment, CK;

[0036] ②Single urea treatment, U;

[0037] ③Urea + urease inhibitor (n-butylthiophosphoric triamide, NBPT), U+NBPT;

[0038] ④ Urea + nitrification inhibitor (dicyandiamide, DCD), U+DCD;

[0039] ⑤ Urea + urease inhibitor NBPT + nitrification inhibitor DCD, U + NBPT + DCD.

[0040] Urea nitrogen application rate is 150kg N hm -2 ; NBPT application rate is 0.5% of nitrogen application rate; DCD application rate is 5% of nitrogen application rate. According to 50ml·m 2 Dissolve the weighed urea and inhibitors in distilled wa...

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Abstract

The invention discloses a technology for reducing gaseous nitrogen loss after urea application in a degraded alpine meadow. The technology comprises the following steps: step 1, experimental design and treatment; step 2, determination of the ammonia volatilization amount: determining the soil ammonia volatilization amount by adopting a ventilation method-continuous flow analyzer; step 3, determination of the discharge amount of N2O: determining the flux of N2O by adopting a static box-gas chromatograph; step 4, calculation of NH3 and N2O; and step 5, applying 0.5% of NBPT and 5% of DCD to the urea, so that the gas emission of urea nitrogen can be remarkably reduced. Through the technology, it can be verified that gas emission of urea nitrogen can be remarkably reduced by applying 0.5% of NBPT and 5% of DCD to the urea, NH3 and N2O are both at the low emission rate, and harm to the Tibet plateau environment caused by application of urea is reduced to the maximum extent; NBPT and DCD are safe and harmless, green and environment-friendly, the acting time is long, and raw materials are easy to obtain. The technology s low in cost and suitable for promotion.

Description

technical field [0001] The invention relates to the technical field of gaseous nitrogen loss after urea application in alpine meadows, in particular to a technology for reducing gaseous nitrogen loss in degraded alpine meadows after urea application. Background technique [0002] Alpine grassland is the most important ecosystem in the Sanjiangyuan area. It not only provides the material basis for the production and life of local herdsmen, but also has an important ecosystem service function in terms of climate regulation, water conservation, soil and water conservation, carbon sequestration, genetics, landscape, and cultural education. However, due to climate change and irrational use by humans, the grassland ecosystem in the Sanjiangyuan region has been severely degraded. The grassland degraded area is 8.9332 million hectares, accounting for 31.88% of the grassland area in the Sanjiangyuan region. Among them, the slightly degraded area is 3.727 million hectares, the modera...

Claims

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Application Information

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IPC IPC(8): A01C21/00C05G3/90
CPCA01C21/00C05C9/00C05G3/90Y02P60/21
Inventor 刘攀王文颖刘艳方胡华伟靳磊杨玉青
Owner QINGHAI NORMAL UNIV
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