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Determination method for maximum allowable input quantity of nitrorgenous fertilizer in watershed scale

A maximum allowable, nitrogen technology, applied in fertilization methods, fertilization devices, applications, etc., can solve the problems of being unable to quantitatively evaluate the water environmental effects of nitrogen fertilizers, quantifying the process of nutrient loss, and easy loss of excess nutrients, etc., to achieve the method Convenience, easy operation, simple operation effect

Active Publication Date: 2015-11-04
INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the determination of nitrogen fertilizer input generally focuses on the agronomic effect with the yield as the assessment target, while the method with the environmental effect as the consideration target is mostly limited to the "excess nutrients that exceed crop nutrient requirements are prone to loss". risk theory
The method of determining the amount of nitrogen fertilizer input based on the theory of excess nutrient loss risk cannot quantify the process of nutrient loss in the watershed due to the lack of consideration of the impact of terrain, climate and other factors on nutrient loss, so it is impossible to quantitatively evaluate the impact of nitrogen fertilizer input on the target water body water environmental effects

Method used

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  • Determination method for maximum allowable input quantity of nitrorgenous fertilizer in watershed scale
  • Determination method for maximum allowable input quantity of nitrorgenous fertilizer in watershed scale
  • Determination method for maximum allowable input quantity of nitrorgenous fertilizer in watershed scale

Examples

Experimental program
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Embodiment 1

[0045] 1. Select the Fengyu River Basin, a sub-basin of the Erhai Lake Basin in the lake area of ​​the Yunnan Plateau, as a typical research area. The Fengyu River Basin is located at 99°51′31″-100°01′46″ east longitude and 25°52′48″-26°05′52″ north latitude. It is located in the southwest of Eryuan County, Dali Prefecture, western Yunnan. Typical sub-watersheds (see the location map of the Fengyu River Basin figure 1 ).

[0046] The terrain of the basin is mountainous and hilly, with an altitude of 2072-3621m and a basin area of ​​219km 2 . The climate belongs to the northern subtropical plateau monsoon climate, with little temperature difference between the four seasons and an average annual temperature of 13.9°C; the average annual precipitation is 745mm, dry in winter and spring, rainy in summer and autumn, with distinct seasons of rain and drought, and the rainy season is from May to October, with many rainy days and large rainfall And concentrated; November to next Ap...

experiment example 2

[0070] Adopt Li Manman etc. (Hebei Agricultural University, Li Manman, the SWAT model that SWAT model is in the runoff simulation research of Erhai Lake Basin, 2012) etc. to collect and prepare, for the further processing of data, adopt SWAT data in the embodiment of the present invention 1 Next steps in processing.

[0071] The results were similar to those of Example 1.

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Abstract

The invention relates to a determination method for the maximum allowable input quantity of a nitrorgenous fertilizer in a watershed scale. The method comprises the following steps: (1) selecting a typical research region; (2) constructing a model of non-point source pollution of the typical research region and carrying out simulation verification; (3) establishing a response relationship between the input quantity of the nitrorgenous fertilizer and the output concentration of the nitrorgenous fertilizer; (4) affirmatively ensuring a safe total nitrogen concentration limiting value of quality of surface water in a target research region according to environmental planning and environmental partitioning water quality demands of the target research region; and (5) determining the maximum allowable input quantity of the nitrorgenous fertilizer of the target research region. The method provided by the invention has a very good application prospect in the technical field of prevention and control management of agricultural non-point source pollution in the watershed scale.

Description

technical field [0001] The invention relates to the technical field of agricultural environmental protection, in particular to a method for determining the maximum allowable input of nitrogen fertilizers at the watershed scale. Background technique [0002] Agricultural non-point source pollution usually refers to the sediment, nutrients, pesticides and other pollutants in the farmland that enter the water body through surface runoff, soil inflow, farmland drainage and infiltration during irrigation or precipitation during agricultural production activities. Environmental pollution of surface and groundwater. [0003] The high input of nitrogen fertilizers is considered to be one of the main sources of agricultural non-point source pollution, so it is urgent to delineate the restrictive standards of nitrogen fertilizer inputs and their determination methods to formulate nitrogen nutrient levels based on the goals of agricultural non-point source pollution prevention and cont...

Claims

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Application Information

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IPC IPC(8): A01C21/00
Inventor 刘宏斌李文超习斌胡万里雷秋良刘申翟丽梅王洪媛武淑霞任天志雷宝坤崔超
Owner INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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