Method for observing amount of leaching of nitrogen and phosphorus in soil with lifting process of shallow underground water level

A groundwater level and phosphorus element technology, which is applied in the agricultural field, can solve the problem that nitrogen, phosphorus and other elements are leached into groundwater and cannot be monitored, and achieve the effect of ingenious design, convenient construction and simple structure

Inactive Publication Date: 2015-04-15
INST OF AGRI ENVIRONMENT & RESOURCES YUNNAN ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the situation in the prior art that a large amount of elements such as nitrogen and phosphorus in the farmland soil are leached and migrated to the deep soil, and as the shallow groundwater level rises and falls, the nitrogen and phosphorus and other elements are leached into the groundwater. Defects and deficiencies that cannot be monitored, providing a method to observe the leaching amount of nitrogen, phosphorus and other elements in the soil during the process of rising and falling with the shallow groundwater level

Method used

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  • Method for observing amount of leaching of nitrogen and phosphorus in soil with lifting process of shallow underground water level
  • Method for observing amount of leaching of nitrogen and phosphorus in soil with lifting process of shallow underground water level
  • Method for observing amount of leaching of nitrogen and phosphorus in soil with lifting process of shallow underground water level

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Embodiment 1

[0030] Embodiment 1 is an embodiment in which when the groundwater level falls above the bottom surface of the soil holding bucket 1, formula I is used to calculate the leaching amount of nitrogen or phosphorus in the soil during the process of rising and falling with the shallow groundwater.

[0031] combine as figure 1 — Image 6 , the present invention observes nitrogen or phosphorus element leaching amount in the soil in the process of rising and falling with the shallow groundwater level with a device for observing nitrogen and phosphorus elements in the soil during the process of rising and falling of the shallow groundwater level, and the steps are as follows:

[0032] A. Before filling the soil into the soil bucket 1, first measure the soil bulk density of the different soil layers of the soil taken, and at the same time take out the shallow groundwater in the original place of the soil taken, and then layer the soil according to the natural soil layer distribution in ...

Embodiment 2

[0041] Embodiment 2 is an embodiment in which when the groundwater level drops below the bottom of the soil-holding bucket 1, formula II is used to calculate the leaching amount of nitrogen or phosphorus in the soil during the process of rising and falling with the shallow groundwater.

[0042] combine as figure 1 — Figure 5 , Figure 7 The nitrogen or phosphorus element leaching device in the soil during the observation of the shallow groundwater level rise and fall used in this embodiment 2 is the same as that of Example 1, and the nitrogen or phosphorus element leaching in the soil during the shallow groundwater level rise and fall The steps to observe the quantity are as follows:

[0043] A. Before filling the soil into the soil bucket 1, first measure the soil bulk density of the different soil layers of the soil taken, and at the same time take out the shallow groundwater in the original place of the soil taken, and then layer the soil according to the natural soil la...

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Abstract

The invention discloses a method for observing amount of leaching of nitrogen and phosphorus in soil with lifting process of shallow underground water level. The method employs a device for observing amount of leaching of nitrogen and phosphorus in soil with lifting process of shallow underground water level to observe. The method is as below: filling soil into a bucket for containing soil; adding shallow underground water in a bucket for containing water; rising underground water to the bucket for containing soil; opening a water tap to discharge water; turning off the tap; measuring the height of soil leached by underground water; calculating the volume of the soil; and calculating amount of leaching of nitrogen and phosphorus in soil with lifting process of shallow underground water level according to measured unit weight of soil, and content of nitrogen or phosphorus in soil before and after lifting of underground water level. The invention can realize real-time monitor on the amount of leaching of nitrogen and phosphorus in soil with lifting process of shallow underground water level, and make up for the problem of incapability of quantitative observation on loss amount of nitrogen or phosphorus in deep soil with lifting process of shallow underground water level.

Description

technical field [0001] The invention relates to an observation method for leaching and migration of soluble elements such as nitrogen or phosphorus in soil during the process of rising and falling of the shallow groundwater level. The method is especially suitable for simulating farmland with shallow buried depth of groundwater and belongs to the field of agricultural technology. This method provides a new way to observe the loss of nitrogen, phosphorus and other elements with the rise and fall of shallow groundwater level. Background technique [0002] In modern agricultural production, in order to pursue high crop yields, farmers apply a large amount of chemical fertilizers such as nitrogen and phosphorus during the planting process. Except for a small part that is absorbed and utilized by crops, a large part of nitrogen and phosphorus infiltrates and shallows with soil moisture. The rise and fall of the groundwater level has leached into the groundwater, causing serious g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24
Inventor 陈安强雷宝坤朱红业杨艳鲜胡万里毛妍婷
Owner INST OF AGRI ENVIRONMENT & RESOURCES YUNNAN ACAD OF AGRI SCI
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