Farmland phosphorus-saving synergistic fertilization method taking into account soil environmental capacity under rice-wheat rotation system

A technology for environmental capacity and farmland phosphorus saving, applied in fertilization methods, fertilization devices, agriculture, etc., can solve problems such as excessive application, and achieve the effect of protecting the water environment and saving phosphorus resources

Pending Publication Date: 2018-10-19
HENAN AGRICULTURAL UNIVERSITY +1
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  • Application Information

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Problems solved by technology

[0007] In view of the unreasonable problems such as excessive application of phosphorus fertilizers in the current process of applying phosphorus fertilizers in my country, the technical problem to be solved by the

Method used

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  • Farmland phosphorus-saving synergistic fertilization method taking into account soil environmental capacity under rice-wheat rotation system
  • Farmland phosphorus-saving synergistic fertilization method taking into account soil environmental capacity under rice-wheat rotation system
  • Farmland phosphorus-saving synergistic fertilization method taking into account soil environmental capacity under rice-wheat rotation system

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Embodiment 1

[0040] Example 1: Experimental Research on Phosphorus-saving and Efficient Fertilization in Huanghuai Rice-wheat Rotation Farmland

[0041] (1) Determination of soil phosphorus content in Henan Province

[0042] Based on the survey and measurement results of 400,000 soil samples in the National Soil Testing and Formula Project from 2005 to 2009, it can be concluded that the current average soil available phosphorus content in Henan Province is 2.94 times higher than the 5.90 P mg / kg in the second national soil survey. Up to 17.37P mg / kg, detailed data such as figure 1 shown.

[0043]Through the comparative study on the historical changes of soil phosphorus content in the top layer of paddy soil in Henan Province, it was found that the average content of the national soil testing formula in 2005-2009 was 12.73 P mg / kg, while in 2012, 829 samples of paddy soil from the whole province were tested. The average content of the self-test results is 15.10 P mg / kg, which is 7.03 P mg...

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Abstract

The invention discloses a farmland phosphorus-saving synergistic fertilization method which is suitable for use in a rice-wheat rotation zone along Yellow River and takes into account soil environmental capacity, the method is as follows: in a wheat planting season, before planting of wheat, by combined with land preparation, 90-110 kg/ hm<2> of P2O5 are basically applied, and nitrogen and potassium fertilizers are applied according to local customary dosages; and in a rice planting season, nitrogen and potassium fertilizers other than phosphorus are normally applied according to local customary dosages. The farmland phosphorus-saving synergistic fertilization method not only can ensure the demand for phosphorus nutrition of crops, but also can control excess phosphorus accumulation in farmland soil by scientific phosphorus application, can guide the scientific use of the phosphate fertilizer in current agricultural production, and is of great significance for saving phosphorus resources and protecting water environment.

Description

technical field [0001] The invention relates to the technical field of agricultural planting, in particular to a method for fertilizing in farmland with phosphorus saving and synergistic effect, which is suitable for taking into account the soil environment capacity along the yellow rice-wheat rotation area. Background technique [0002] Phosphorus is a limiting factor for crop growth and a critical factor for water eutrophication, and it is also an important non-renewable resource. When the total phosphorus in the water body is greater than 20mg / L, it can be determined that there is a risk of enrichment. [0003] In the 1980s, China's arable land was generally deficient in phosphorus, and the soil's phosphorus supply capacity was extremely low. In order to meet the growing population's demand for food, the country has begun to vigorously develop the phosphate fertilizer industry and increase the amount of phosphate fertilizer used to improve the effective phosphorus pool o...

Claims

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Application Information

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IPC IPC(8): A01C21/00
CPCA01C21/005
Inventor 谢迎新扶定周国勤谢旭东康国章马冬云王晨阳郭天财
Owner HENAN AGRICULTURAL UNIVERSITY
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