Corn special-purposed composite fertilizer application method

A compound fertilizer and corn-specific technology, applied in the agricultural field, can solve the problems of low nutrient utilization rate, unscientific fertilizer application, restricting corn production and development, etc., and achieve the effect of maintaining the continuous supply capacity of soil, realizing efficient utilization and saving costs.

Inactive Publication Date: 2017-02-15
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

But at present, in the actual production of corn, there are problems such as unscientific fertilizer application and low nutrient utilization rate, which seriously restrict the further development of corn production.

Method used

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  • Corn special-purposed composite fertilizer application method
  • Corn special-purposed composite fertilizer application method
  • Corn special-purposed composite fertilizer application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In this example, the spring sowing corn in Northeast China is taken as an example. According to the local environmental conditions and the statistical data of local corn production in 2005-2010, the target yield of spring sowing corn in Northeast China is 9772kg / hm 2 , The potassium requirement of 100kg grain is 1.69kg.

[0045] The actual surveyed straw yield of spring sown corn in Northeast China is 9401kg / hm 2 . The straw returning rate is 36.7%. The mass of potassium in 100kg of straw is 1.60kg.

[0046] The content of available potassium in the spring-sowed corn area in Northeast China is 133 mg / kg. Based on the soil available potassium 100 mg / kg, the correction coefficient of potassium fertilizer application for spring-sown corn in Northeast China is 0.75.

[0047] The mass of potassium entering the unit area of ​​farmland from the environment and the loss rate of potassium are negligible.

[0048] Then according to the formula:

[0049]

[0050] Calculate...

Embodiment 2

[0077] In this example, the spring sowing corn in the north is taken as an example. According to the local environmental conditions and the statistical data of local corn production in 2005-2010, the target yield of spring sowing corn in the north is 11597kg / hm 2 , The potassium requirement of 100kg grain is 1.61kg.

[0078] The actual surveyed straw yield of spring sown corn in northern China is 11231kg / hm 2 , the rate of straw returning to the field was 83.3%, and the mass of potassium in 100kg of straw was 1.69kg.

[0079] The available potassium content in the northern spring-sown corn area is 157 mg / kg. Based on the soil available potassium 100 mg / kg, the correction coefficient of potassium fertilizer application for spring-sown corn in the northeast is 0.64.

[0080] The mass of potassium entering the unit area of ​​farmland from the environment and the loss rate of potassium are negligible.

[0081] Then according to the formula:

[0082]

[0083] Calculate the re...

Embodiment 3

[0110] In this example, the summer-sown corn in the Huang-Huai-Hai Plain is taken as an example. According to the local environmental conditions and the local corn production statistics from 2005 to 2010, the target yield of summer-sown corn in the Huang-Huai-Hai Plain is 9426kg / hm 2 , The potassium requirement of 100kg grain is 1.80kg.

[0111] The straw yield of summer sown corn in the Huanghuaihai Plain is 9068kg / hm 2 , the rate of straw returning to the field was 85.0%, and the mass of potassium in 100kg of straw was 1.68kg.

[0112] The available potassium content in the summer-sown corn area of ​​the Huang-Huai-Hai Plain is 104 mg / kg. Based on the soil available potassium 100 mg / kg, the correction coefficient of potassium fertilizer application for the summer-sowed corn in the Huang-Huai-Hai Plain is 0.96.

[0113] The mass of potassium entering the unit area of ​​farmland from the environment and the loss rate of potassium are negligible.

[0114] Then according to th...

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Abstract

The invention relates to a corn special-purposed composite fertilizer application method. The method comprises the step that a composite fertilizer is applied in a field in a corn growth period. The composite fertilizer comprises a nitrogen fertilizer, a phosphorus fertilizer and a potassium fertilizer. The method is characterized in that a potassium fertilizer application amount in unit area of field is as shown in the formula. In the formula, CorpK-out is the mass of potassium brought out of the field when the corn in the unit area of field is harvested. EnvK-in is the mass of potassium entering the unit area of field from the environment. RatK-out is potassium loss rate of the unit area of field. alpha is a potassium fertilizer application correction coefficient, wherein alpha=standard available potassium content/field soil available potassium content. With the above technical scheme, the fertilization amount recommended by the invention assists in providing supplementation in nutrient absorption during a corn growth period, and assists in providing supplementation for soil nutrient loss during the corn growth period. Therefore, soil nutrient balance can be maintained, soil continuously supplying capacity is maintained, and corn high and stable yield can be ensured.

Description

technical field [0001] The invention relates to the field of agriculture, in particular to a method for applying a special compound fertilizer for corn. Background technique [0002] Corn is one of the three major food crops (wheat, corn and rice) in China. The sown area and output of corn in my country account for 22.1% and 39.5% of the national grain sown area and the national total grain output, ranking first in grain crops. Corn is in a prominent position in the national food security strategy and plays a pivotal role in ensuring my country's food supply needs in the future. But at present, in the actual production of corn, there are problems such as unscientific fertilizer application and low nutrient utilization rate, which seriously restrict the further development of corn production. Therefore, it is necessary to invent a method of applying special compound fertilizers according to different regions of corn to ensure the long-term balance of the soil environment, m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01C21/00
CPCA01C21/007
Inventor 车升国赵秉强袁亮李燕婷沈兵林治安李伟杨相东李娟
Owner INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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