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Method for reducing loss of chemical fertilizer in soil

A soil and chemical fertilizer technology, applied in fertilization methods, botanical equipment and methods, fertilization devices, etc., can solve problems such as difficulty and high technical requirements, and achieve the effects of reducing fertilizer loss, pollution, and fertilizer usage

Inactive Publication Date: 2009-04-22
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

To popularize the technology of deep fertilization on a large scale, it must be completed by machinery, which requires high technology and is difficult to promote in practice.
However, there are no technical reports to reduce the loss of soil fertilizers and nutrients by using simple and low-cost mulching technology.

Method used

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  • Method for reducing loss of chemical fertilizer in soil
  • Method for reducing loss of chemical fertilizer in soil
  • Method for reducing loss of chemical fertilizer in soil

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The experimental site of the embodiment of the present invention is the teaching base in South China Agricultural University. Sweet corn (Zea mays saccharata) was selected as the experimental crop with a plant spacing of 42 cm.

[0033] (1) Soil is distributed as film covering interval 60cm wide, corn planting interval, and described corn planting interval is positioned at both sides of film covering interval;

[0034] (2) Utilize agricultural film to cover the soil surface in the film coverage interval;

[0035] (3) Sweet corn planting method: transplant the seedlings of 3-leaf seedling age to the corn planting interval, and allow the plants to be planted on both sides of the film;

[0036] (4) Apply N: 20kg per 1 / 15 hectare according to the amount of fertilizer applied to the crops; P 2 o 5 : 10kg; K 2 O: 20kg, base fertilizer adopts 15-15-15 compound fertilizer (1 / 3); and according to each link of crop growth, wherein seedling stage topdressing compound fertilize...

Embodiment 2

[0048] The experimental site of the embodiment of the present invention is the teaching base in South China Agricultural University. Sweet corn (Zea mays saccharata) was selected as the experimental crop with a plant spacing of 42 cm.

[0049] (1) Soil is distributed as film covering interval 60cm wide, corn planting interval, and described corn planting interval is positioned at both sides of film covering interval;

[0050] (2) Utilize the agricultural black film to cover the soil surface in the film coverage interval;

[0051] (3) Sweet corn planting method: transplant the seedlings of 3 leaf seedling ages to the plot, and allow the plants to be planted on both sides of the film;

[0052] (4) According to the growth situation of the crops planted in the first stubble; in the second stubble, topdressing is only applied at the jointing stage and bell mouth stage, and the amount of fertilizer applied is reduced by 50% on the first stubble total amount. Fertilizers are evenly...

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Abstract

The invention discloses a method for reducing loss of chemical fertilizer in soil. The method is to divide soil into a plastic film covered zone and planting zones which are at two sides of the plastic film covered zone, cover the soil in the plastic film covered area with a plastic film, apply chemical fertilizer in soil in the plastic film covered area to protect the chemical fertilizer from rain and plant seeds or seedlings of plants in soil of the planting area. The method uses soil zone division, plastic film covering and other technologies to realize water and fertilizer separation to reduce loss of nutrition with water and environment pollution caused by lost fertilizer flowing into the environment and improve use rate of the chemical fertilizer, thereby improving the input-output ratio of the chemical fertilizer for farmers.

Description

technical field [0001] The invention belongs to the technical field of agricultural production, and in particular relates to a method for reducing the loss of soil chemical fertilizers. Background technique [0002] In modern agricultural production, chemical fertilizers play an increasingly important role. According to the statistics of the Food and Agriculture Organization of the United Nations (FAO), the role of chemical fertilizers in crop yields accounts for 40% to 60%. At present, the amount of chemical fertilizers used in my country has ranked first in the world, and the annual amount used in the country has exceeded 41.24 million tons. Fertilizer consumption up to 400kg·hm -2 , which is three times the world average level, far exceeding the 225kg·hm set by developed countries to prevent water pollution -2 safety upper limit. In 2001, my country's chemical fertilizer output reached 40 million tons, of which nitrogen fertilizer output reached 25 million tons (pure N)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G1/00A01C21/00
Inventor 陈火君吴启堂卫泽斌丘锦荣
Owner SOUTH CHINA AGRI UNIV
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