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Method for improving production function of alpine grassland of Tibet Plateau by sprinkling dicyandiamide

A dicyanoammonium, high-cold technology, applied in land preparation methods, horticultural methods, lawn growth, etc., can solve the problems of thinning of the ozone layer, weakening of the ability to resist ultraviolet rays, and threats to human health, etc., to reduce emission rates, low costs, and nitrogen reduction. The effect of leaching loss

Inactive Publication Date: 2019-08-06
CHINA ACAD OF SCI NORTHWEST HIGHLAND BIOLOGY INST
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Problems solved by technology

At the same time N 2 O will also react photochemically with ozone in the stratosphere, resulting in the thinning of the ozone layer and weakening of the ability to resist ultraviolet rays, directly threatening human health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The test sample plot of the present embodiment is carried out at Qinghai Haibei Alpine Grassland Ecosystem National Field Scientific Observation and Research Station, Kobresia comprehensible observation field (37 ° 32 'N, 101 ° 15 'E, 3280m). The test was divided into treatment group and control group, in the treatment group, 3.4kg ha -1 The DCD sample and the control group were sprayed with the same amount of river water to eliminate the impact on grassland biomass and N due to increased water input. 2 The effect of O emission rate.

[0023] The sample square used to measure the grassland biomass is 50cm×50cm. The standard sample plot harvesting method is set at 65°C and weighed after drying to constant weight to calculate the net primary productivity of the aboveground part of the grassland. The measurement time is the morning of August 25. Alpine grassland soil N 2 O emission rate, based on closed box-gas chromatography. The airtight box (50cm×50cm×50cm) was clos...

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Abstract

The invention provides a method for improving the production function of alpine grassland of the Tibet Plateau by sprinkling dicyandiamide. In the initial period of the growing season, 3.4 kg ha-1 ofa concentration nitrification inhibitor DCD is applied, so that the productivity of the alpine grassland is increased by 27.2%, and the fine grass family and sedge family pasture proportion is increased; the N2O emission rate of the alpine grassland ecosystem is reduced by 36.4%, and the significance test level (P<0.05) is reached. Through a mode of applying the nitrification inhibitor DCD in theinitial period of the growing season, the content of ammonium nitrogen in soil is increased, the content of nitrate nitrogen in the soil is reduced, nitrogen element loss is reduced, the nitrogen element utilization efficiency is improved, and the win-win purpose of improving the production function of alpine meadow and reducing N2O as an atmospheric greenhouse gas is achieved.

Description

technical field [0001] The invention belongs to the technical field of greenhouse gas emission reduction, in particular to a method for improving the production function of alpine grassland on the Qinghai-Tibet Plateau by sprinkling dicyandiamide. Background technique [0002] The total area of ​​grassland in Qinghai Province is 631 million mu. Among them, the area of ​​natural grassland is 610 million mu, and the usable area of ​​natural grassland is 580 million mu, accounting for 55.79% of the total land area of ​​the province. Affected by long-term overgrazing and climate change, alpine grasslands are being degraded on a large scale, with more than 1 / 3 of the moderately and severely degraded grasslands. Reasonably and effectively restore degraded natural grassland, closely combine grassland ecological restoration with grassland productivity improvement, and vigorously promote environmentally friendly, high-yield, high-efficiency, and sustainable animal husbandry under th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G20/00A01G7/06A01B79/02
CPCA01B79/02A01G7/06A01G20/00
Inventor 杜岩功郭小伟舒锴辛莹钱大文柯浔曹广民周华坤
Owner CHINA ACAD OF SCI NORTHWEST HIGHLAND BIOLOGY INST
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