Method for increasing absorption and utilization ratio of selenium-containing fertilizer under dry farming condition

Abstract

The invention discloses a method for increasing the absorption and utilization ratio of selenium-containing fertilizer under a dry farming condition. On the basis that the selenium-containing fertilizer is applied to soil, a selenium transformation accelerator and a selenium absorption accelerator are further applied to the soil. On the one hand, the transformation of a selenium-containing compound to selenate or selenite is promoted; and on the other hand, excessive H ions released by crop roots and used for being exchanged for cations are absorbed and combined to promote the absorption of selenium, so that the utilization ratio of a selenium nutritional agent can be increased by above 50 percent, the cost can be saved and the selenium are effectively enriched.

Description

technical field

[0001] The invention relates to a method for improving the absorption and utilization rate of selenium-containing fertilizers under dry farming conditions, and belongs to the technical field of agricultural fertilization and agronomy. technical background

[0002] Selenium, element symbol Se, is an essential trace element for the human body and is the active center of glutathione peroxidase (GSH-Px). It has biological characteristics such as anti-cancer and anti-cancer, anti-oxidation and anti-aging, improving human immunity, and antagonizing heavy metals. Selenium in the food chain mainly comes from soil. If the distribution of selenium content in soil in different regions is uneven, it is an important direction for agricultural production research to implement and carry out targeted selenium-enrichment work based on local selenium-poor soil clues. Optimizing the selenium content level in the food chain is an important direction for agricultural production ...

Examples

Embodiment 1

[0022] In a wheat planting field, a mixture of sodium selenite and soil with a selenium concentration of 2000 mg / kg was prepared as a selenium-containing fertilizer. Mix the above-mentioned selenium-containing fertilizer with the ratio of 4:26 and nitrogen-phosphorus-potassium compound fertilizer evenly, as the base fertilizer, apply the selenium-containing fertilizer according to the amount of 32 kg / mu, that is, 8 g / mu of selenium, and mix and apply simultaneously with the Potassium carbonate with a mass ratio of selenium fertilizer of 1:2 is used to change the soil microenvironment around the fertilizer and promote the transformation of selenium fertilizer into an effective form. Simultaneously, a control group that only uses the same amount of the above-mentioned selenium-containing fertilizer is set. Selenium content of wheat after harvest.

[0023] After testing, the selenium content in wheat was 0.112 mg / kg~0.129 mg / kg, with an average of 0.120 mg / kg, while the control ...

Embodiment 2

[0025] In a pear tree planting field, a mixture of sodium selenate and soil with a selenium concentration of 4500 mg / kg was prepared as a selenium-containing fertilizer. According to the amount of 10 kg / mu, that is, 45 g / mu of selenium was applied to the selenium-containing fertilizer Afterwards, nitrogen, phosphorus, and potassium compound fertilizers were applied at a ratio of 4:26, and at the same time, mixed application of calcium oxide with a mass ratio of 1:2 to selenium-containing fertilizers was used to change the soil microenvironment around the fertilizers and promote the transformation of selenium fertilizers into effective forms. Simultaneously, a control group that only uses the same amount of the above-mentioned selenium-containing fertilizer is set. The selenium content of pears was tested after harvest.

[0026] After testing, the average selenium content in pears was 18 μg / kg, while that in the control group was only about 8 μg / kg.

Embodiment 3

[0028] In a grape vine planting area, a mixture of sodium selenate and soil with a selenium concentration of 4500 mg / kg was prepared as a selenium-containing fertilizer. Calcium hydroxide is applied in proportion, and then the selenium-containing fertilizer is applied according to the dosage of 10 kg / mu, that is, 45 g / mu in terms of selenium; and then sodium nitrate with a mass ratio of 1:2 to the selenium-containing fertilizer is used to change the soil microenvironment , to promote the transformation of selenium fertilizer into effective form. Simultaneously, a control group that only uses the same amount of the above-mentioned selenium-containing fertilizer is set. Grapes were tested for selenium after harvest.

[0029] After testing, the average selenium content in pears was 26 μg / kg, while that in the control group was only about 10 μg / kg.

technical field

[0001] The invention relates to a method for improving the absorption and utilization rate of selenium-containing fertilizers under dry farming conditions, and belongs to the technical field of agricultural fertilization and agronomy. technical background

[0002] Selenium, element symbol Se, is an essential trace element for the human body and is the active center of glutathione peroxidase (GSH-Px). It has biological characteristics such as anti-cancer and anti-cancer, anti-oxidation and anti-aging, improving human immunity, and antagonizing heavy metals. Selenium in the food chain mainly comes from soil. If the distribution of selenium content in soil in different regions is uneven, it is an important direction for agricultural production research to implement and carry out targeted selenium-enrichment work based on local selenium-poor soil clues. Optimizing the selenium content level in the food chain is an important direction for agricultural production ...

Examples

Embodiment 1

[0022] In a wheat planting field, a mixture of sodium selenite and soil with a selenium concentration of 2000 mg / kg was prepared as a selenium-containing fertilizer. Mix the above-mentioned selenium-containing fertilizer with the ratio of 4:26 and nitrogen-phosphorus-potassium compound fertilizer evenly, as the base fertilizer, apply the selenium-containing fertilizer according to the amount of 32 kg / mu, that is, 8 g / mu of selenium, and mix and apply simultaneously with the Potassium carbonate with a mass ratio of selenium fertilizer of 1:2 is used to change the soil microenvironment around the fertilizer and promote the transformation of selenium fertilizer into an effective form. Simultaneously, a control group that only uses the same amount of the above-mentioned selenium-containing fertilizer is set. Selenium content of wheat after harvest.

[0023] After testing, the selenium content in wheat was 0.112 mg / kg~0.129 mg / kg, with an average of 0.120 mg / kg, while the control ...

Embodiment 2

[0025] In a pear tree planting field, a mixture of sodium selenate and soil with a selenium concentration of 4500 mg / kg was prepared as a selenium-containing fertilizer. According to the amount of 10 kg / mu, that is, 45 g / mu of selenium was applied to the selenium-containing fertilizer Afterwards, nitrogen, phosphorus, and potassium compound fertilizers were applied at a ratio of 4:26, and at the same time, mixed application of calcium oxide with a mass ratio of 1:2 to selenium-containing fertilizers was used to change the soil microenvironment around the fertilizers and promote the transformation of selenium fertilizers into effective forms. Simultaneously, a control group that only uses the same amount of the above-mentioned selenium-containing fertilizer is set. The selenium content of pears was tested after harvest.

[0026] After testing, the average selenium content in pears was 18 μg / kg, while that in the control group was only about 8 μg / kg.

Embodiment 3

[0028] In a grape vine planting area, a mixture of sodium selenate and soil with a selenium concentration of 4500 mg / kg was prepared as a selenium-containing fertilizer. Calcium hydroxide is applied in proportion, and then the selenium-containing fertilizer is applied according to the dosage of 10 kg / mu, that is, 45 g / mu in terms of selenium; and then sodium nitrate with a mass ratio of 1:2 to the selenium-containing fertilizer is used to change the soil microenvironment , to promote the transformation of selenium fertilizer into effective form. Simultaneously, a control group that only uses the same amount of the above-mentioned selenium-containing fertilizer is set. Grapes were tested for selenium after harvest.

[0029] After testing, the average selenium content in pears was 26 μg / kg, while that in the control group was only about 10 μg / kg.

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