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Method for fertilizer conservation, yield increase and nitrogen and phosphorus loss interception of rice field, and biofilm culture medium composition

A technology for cultivating substrates and biofilms, applied in fertilizer mixtures, phosphate fertilizers, fertilization devices, etc., can solve the problems of difficulty in wide-scale promotion and application, large floor space, etc., and achieve convenient application and operation methods, increase yield, and prolong residence time. effect of time

Active Publication Date: 2020-02-25
INST OF SOIL SCI CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large area occupied by the above technologies, and the large number of people in our country and the lack of land, it is difficult to promote and apply these technologies on a large scale in areas where the contradiction between people and land is prominent. Therefore, a new type of ecological engineering technology is urgently needed to intercept rice fields. Nitrogen and phosphorus loss, while intercepting the loss of nitrogen and phosphorus in paddy fields, it can also promote rice production

Method used

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  • Method for fertilizer conservation, yield increase and nitrogen and phosphorus loss interception of rice field, and biofilm culture medium composition
  • Method for fertilizer conservation, yield increase and nitrogen and phosphorus loss interception of rice field, and biofilm culture medium composition
  • Method for fertilizer conservation, yield increase and nitrogen and phosphorus loss interception of rice field, and biofilm culture medium composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: Comparison of the concentration of nitrogen and phosphorus in the soil of the test field and the control field

[0028] Such as figure 1 As shown, the total phosphorus concentrations of the five time points in the soil of the control field were 0.9±0.2, 0.8±0.0, 0.8±0.0, 0.7±0.1, 0.8±0.0, 0.8±0.0 g / kg; The total phosphorus concentrations at the time points were 0.9±0.0, 0.9±0.1, 0.9±0.0, 0.8±0.0, 0.9±0.1, 1.0±0.1g / kg. After calculation, the total phosphorus concentration in the soil of the experimental field was 6.3%-18.1% higher than that of the control field.

Embodiment 2

[0029] Example 2, such as figure 2 As shown, the total nitrogen concentrations of the five time points in the soil of the control field were 2.1±0.091, 2.5±0.1, 2.495±0.2, 2.4±0.3, 2.5±0.2, 2.3±0.215 g / kg; The total nitrogen concentrations at the time points used were 2.2±0.2, 2.6±0.1, 2.6±0.2, 2.7±0.1, 2.7±0.3, 2.9±0.3 g / kg, respectively. After calculation, the total nitrogen concentration in the soil of the test field was 3.2%-28.1% higher than that in the control field.

Embodiment 3

[0030]Embodiment 3: Comparison of rice yield in the test field and the control field

[0031] Through yield measurement, the rice yield in the control field was 7932.5±545.8 kg / ha; the rice yield in the test field was 8835.0±216.1 kg / ha. After calculation, the rice yield in the test field increased by 11.4% compared with the rice yield in the control field.

[0032] To sum up the above examples 1-3, 1 day after rice transplanting and 1 day after ear fertilizer application, respectively, 45kg / ha and 30kg / ha of artificial carriers were applied to the paddy field, which can significantly reduce the concentration of nitrogen and phosphorus in the field surface water while increasing Nitrogen and phosphorus concentrations in the soil. In addition, the method provided by the invention can also increase the yield of rice by 11.4%.

[0033] Embodiment 3: the comparison of nitrogen and phosphorus concentrations in the surface water of the test field and the control field

[0034] Su...

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Abstract

The invention discloses a method for fertilizer conservation, yield increase and nitrogen and phosphorus loss interception of the rice field, and a biofilm culture medium composition. The method comprises the following steps: (1) preparing a natural biofilm culture medium: dissolving sodium nitrate, dipotassium phosphate, magnesium sulfate heptahydrate, calcium chloride heptahydrate, citric acid,ferric ammonium citrate, boric acid, manganese chloride tetrahydrate, zinc sulfate, sodium molybdate, copper sulfate pentahydrate and cobalt nitrate hexahydrate in 1 L of distilled water in proportionto prepare the natural biofilm culture medium; (2) preparing a sodium alginate solution; (3) preparing a spherical carrier of the natural biofilm; and (4) applying the spherical carrier of the natural biofilm in the rice field: respectively broadcasting the artificial carrier in the rice field one day after rice transplanting and one day after spike fertilizer application in order to induce the growth of the natural biofilm in the rice field. The method remarkably increases the content of total nitrogen and total phosphorus in soil, remarkably increases the rice yield, obviously reduces the content of total nitrogen and total phosphorus in field surface water, and reduces the runoff loss risk of nitrogen and phosphorus.

Description

technical field [0001] The invention belongs to the technical field of agricultural non-point source pollution control and crop production, and in particular relates to a method for realizing nitrogen and phosphorus interception in paddy fields and promoting rice yield increase by using artificially induced natural biofilm. The invention also relates to biofilm culture substrate compositions used in such methods. Background technique [0002] With the acceleration of my country's industrialization process, most of the urban and rural areas in my country are currently suffering from water pollution to varying degrees. According to the source of pollution, water pollution can be divided into point source pollution and non-point source pollution. The agricultural non-point source pollution caused by the irrational use of pesticides and chemical fertilizers, the harmless treatment of agricultural waste and the insufficient utilization of resources are difficult to control, incr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/40C05G3/00C05G3/90C05G5/12C05G5/23
CPCC05B7/00C05G3/00Y02P60/21
Inventor 孙朋飞吴永红赵婧宇
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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