CN109302874B - Method for reducing loss of nitrogen in rice field - Google Patents
Method for reducing loss of nitrogen in rice field Download PDFInfo
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- CN109302874B CN109302874B CN201811109292.7A CN201811109292A CN109302874B CN 109302874 B CN109302874 B CN 109302874B CN 201811109292 A CN201811109292 A CN 201811109292A CN 109302874 B CN109302874 B CN 109302874B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C21/00—Methods of fertilising, sowing or planting
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
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- Mechanical Engineering (AREA)
- Fertilizers (AREA)
- Cultivation Of Plants (AREA)
Abstract
A method for reducing the loss of nitrogen in a rice field belongs to the technical field of agriculture. Injecting tap water into the F-type frequency conversion magnetized water generator to obtain magnetized water with the magnetic susceptibility of 200-1000 Gauss, and irrigating the rice field. The invention reduces the loss of nitrogen in soil by using the tap water after magnetization treatment for irrigating the rice field, thereby obtaining better use effect.
Description
Technical Field
The invention belongs to the technical field of agriculture, and particularly relates to a method for reducing nitrogen loss.
Background
Agricultural non-point source pollution is an important cause for deterioration of water body environment quality, and causes wide attention of all countries in the world. The agricultural non-point source pollution emission reduction pressure is very large, and non-point source pollution control is an important environment for improving the water environment quality of a drainage basin.
At present, the total nitrogen loss and the total phosphorus loss of the planting industry are both very large. The main source of total nitrogen in various agricultural non-point source pollutants entering water is farmland runoff. Therefore, the nitrogen loss can be effectively reduced by reducing the nitrogen content in surface runoff.
Disclosure of Invention
In order to overcome the problems in the background art and reduce the loss of the nitrogen in the rice field, the invention provides a method for reducing the loss of the nitrogen in the rice field.
The technical scheme of the invention is as follows:
a method for reducing the loss of nitrogen in rice field features that the running water is injected into F-type frequency-varying magnetized water generator to obtain magnetized water with magnetic susceptibility of 600 gauss, and the nitrogen-containing fertilizer is applied to rice field within 5 days before it is irrigated in two days.
Further, the irrigation is divided into two days, the soil is only irrigated to be moist in the first day, and the soil is irrigated to be in a submerged state in the second day.
Furthermore, the magnetizing flow rate in irrigation is 2 m/min.
Furthermore, the interval time between the first day and the second day is 1-30 days.
Furthermore, the irrigation time comprises a rice seedling raising period, a heading period, a branch lotus period and a grouting period.
The invention has the beneficial effects that:
the invention can obviously reduce the nitrate nitrogen content in the field water within 5 days after fertilization, thereby achieving the effect of reducing the nitrogen loss risk of the rice field.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following detailed description of the present invention is provided with reference to specific embodiments to facilitate understanding of the technical staff.
Experiment 1.
50g of soil sample is taken and mixed with urea and put into plastic cups, and each group has 4 plastic bottles. Three treatments: common tap water; ② tap water with 200 gauss of magnetization intensity; ③ tap water with the magnetization of 1000 gauss. And respectively regulating the soil to be in a flooded state. Sampling after every other day, and respectively determining the contents of total nitrogen, ammoniacal nitrogen and nitrate nitrogen in the water sample and the contents of ammoniacal nitrogen and nitrate nitrogen in the soil.
The experimental results are as follows:
the sum of ammoniacal nitrogen and nitrate nitrogen in the water sample accounts for about 76.5-78.7% of the total nitrogen. The total nitrogen and nitrate nitrogen contents in the comparison treatment are highest, and the total nitrogen and nitrate nitrogen contents of the water sample after magnetization are remarkably reduced and are respectively 69.1% and 68.2% of the comparison treatment. The ammoniacal nitrogen difference is not significant. And the ammonia nitrogen content in the soil of the second treatment and the soil of the third treatment is obviously higher than that of the contrast, but the content difference of the nitrate nitrogen is not obvious. Therefore, the magnetized water can promote the nitrate nitrogen in the surface water to be converted into ammoniacal nitrogen, and the ammoniacal nitrogen is positively charged and is easily adsorbed by the soil body with negative electricity, so that the content of the nitrate nitrogen in the surface water is reduced.
According to previous research results, the rice field surface runoff liquid is mainly water-soluble nitrogen and accounts for more than 70% of the total runoff quantity. In the total amount of water-soluble nitrogen loss, nitrate nitrogen is mainly used. By magnetizing the irrigation water, the nitrate nitrogen content in the field water can be greatly reduced, and the total nitrogen content can be further reduced. Has obvious significance for controlling the loss of the nitrogen in the rice field.
The specific amounts are detailed in the following table:
analysis of causes
The magnetized water can convert nitrate nitrogen into ammoniacal nitrogen, and the ammoniacal nitrogen is positively charged and is easily adsorbed by soil bodies with negative charges, so that the content of the nitrate nitrogen in the surface water of the field is reduced.
Example 1
And (2) irrigating the rice field by using common tap water within 5 days after fertilization, wherein the irrigation time can be a rice seedling raising period, a heading period, a stage lotus and a grouting period, the seedling raising period is taken, water is continuously irrigated for 2 days, the rice field is in a wet state from the first day to the second day, the rice field is in an immersed state from the second day to the first day, the interval time between the first day and the second day is 24 hours, and the irrigation time can be determined randomly within 15-30 hours according to needs.
Continuously taking water for 5 days after irrigation for assay to obtain 52.45mg L nitrate nitrogen content in water-1、42.09mg L-1、26.89mg L-1、66.73mg L-1。
Example 2
And (2) applying nitrogenous fertilizer to the rice field by using tap water with the magnetization intensity of 200 gauss for 5 days to irrigate the rice field, wherein the irrigation time can be rice seedling raising period, lotus period, spike aligning period and grouting period, the seedling raising period is taken, water is continuously irrigated for 2 days, the rice field is in a wet state from the first day to the second day, the rice field is in an immersed state from the second day to the first day, the interval time between the first day and the second day is 24 hours, and the interval time can be randomly determined within 15-30 hours according to needs.
Continuously taking water for 5 days after irrigation for assay to obtain nitrate nitrogen content in waterIs 38.13mg L-1、33.78mg L-1、20.74mg L-1、28.09mg L-1And 50.45mg L-1。
Example 3
The method comprises the following steps of applying nitrogenous fertilizer to a rice field by using tap water with the magnetization intensity of 400 gauss for 5 days, irrigating the rice field, wherein the irrigation time can be rice seedling raising period, lotus period, spike aligning period and grouting period, the seedling raising period is taken, water is continuously irrigated for 2 days, the rice field is in a wet state from the first day to the second day, the rice field is in an immersed state from the second day to the first day, the interval time between the first day and the second day is 24 hours, and the interval time can be randomly determined within 15-30 hours according to needs.
Continuously taking water for 5 days after irrigation for assay to obtain nitrate nitrogen contents of 32.87mg L in water-1、23.84mg L-1、22.91mg L-1、22.52mg L-1And 37.88mg L-1。
Example 4
The method comprises the steps of applying nitrogenous fertilizer to a rice field by using tap water with the magnetization intensity of 600 gauss for 5 days, irrigating the rice field, wherein the irrigation time can be rice seedling raising period, lotus periods, spike aligning period and grouting period, the seedling raising period is taken, water is continuously irrigated for 2 days, the rice field is in a wet state from the first day to the second day, the rice field is in an immersed state from the second day to the first day, the interval time between the first day and the second day is 24 hours, and the interval time can be determined randomly within 15-30 hours according to needs.
Continuously taking water for 5 days after irrigation for assay to obtain nitrate nitrogen contents of 27.98mg L in water-1、22.34mg L-1、23.18mg L-1、18.28mg L-1And 36.52mg L-1。
Example 5
The method comprises the following steps of applying nitrogenous fertilizer to a rice field by using tap water with the magnetization intensity of 800 gauss for 5 days, irrigating the rice field, wherein the irrigation time can be rice seedling raising period, lotus periods, spike aligning period and grouting period, the seedling raising period is taken, water is continuously irrigated for 2 days, the rice field is in a wet state from the first day to the second day, the rice field is in an immersed state from the second day to the first day, the interval time between the first day and the second day is 24 hours, and the interval time can be randomly determined within 15-30 hours according to needs.
Continuously taking water for 5 days after irrigation for assay to obtain nitrate nitrogen content of 28.57mg L in water -1、25.75mg L-1、20.09mg L-1、26.34mg L-1And 52.21mg L-1。
Example 6
The method comprises the following steps of applying nitrogenous fertilizer to a rice field by using tap water with the magnetization intensity of 1000 gauss for 5 days, irrigating the rice field, wherein the irrigation time can be rice seedling raising period, lotus period, spike aligning period and grouting period, the seedling raising period is taken, water is continuously irrigated for 2 days, the rice field is in a wet state from the first day to the second day, the rice field is in an immersed state from the second day to the first day, the interval time between the first day and the second day is 24 hours, and the interval time can be randomly determined within 15-30 hours according to needs.
Continuously taking water for 5 days after irrigation for assay to obtain 34.39mg L nitrate nitrogen content in water-1、32.20mg L-1、21.31mg L-1、30.85mg L-1And 55.84mg L-1。
The results are summarized in the following table:
from the above table analysis it can be seen that: compared with tap water without magnetization treatment, the nitrate nitrogen content of the field water after the magnetization water treatment is obviously reduced. The reduction range is 15% -53%, and the average reduction range is 33%. The magnetization intensity is 600 gauss, the effect is the best, and compared with the control, the nitrate nitrogen in the field water is reduced, and the data are respectively 46.7%, 52.8%, 44.9%, 32.0% and 45.3%.
While the invention has been described in connection with a preferred embodiment, it is not intended to limit the invention, and it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention.
Claims (2)
1. A method for reducing the loss of nitrogen in a rice field is characterized by comprising the following steps: injecting tap water into an F-type frequency conversion magnetized water generator to obtain magnetized water with the magnetic susceptibility of 600 gauss, and irrigating the rice field with the magnetized water for two days within 5 days after applying nitrogenous fertilizer to the rice field, wherein the nitrogenous fertilizer is urea;
irrigating the paddy field to a wet state on the surface of the paddy field on the first day, and irrigating the paddy field to a water layer to submerge the surface of the paddy field on the second day, wherein the interval time between the first day and the second day is 15-30 h.
2. The method for reducing nitrogen loss in rice fields as claimed in claim 1, wherein the period of irrigating the rice fields is seedling raising period, heading period, lotus period and filling period.
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- 2018-09-21 CN CN201811109292.7A patent/CN109302874B/en active Active
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| JP2000007325A (en) * | 1998-06-26 | 2000-01-11 | Shigemi Sawada | Production of ammonia |
| JP2007154271A (en) * | 2005-12-06 | 2007-06-21 | Nippon Steel Corp | Method for producing nonoriented magnetic steel sheet |
| CN104855196A (en) * | 2015-05-08 | 2015-08-26 | 寿县晶鑫农业科技开发有限公司 | Rice direct sowing high-yield cultivation method |
| CN104920018A (en) * | 2015-05-27 | 2015-09-23 | 邓万超 | Sugarcane planting method for increasing sugar content of sugarcane |
| CN106561402A (en) * | 2016-11-01 | 2017-04-19 | 鞍山绿泰佳葡萄主题公园有限公司 | Cultivation method for grapes with magnetic water for irrigation |
| CN108101662A (en) * | 2018-01-24 | 2018-06-01 | 刘长美 | A kind of root irrigation Liquid Fertilizer and its making and use method for plant growth |
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