Method for controlling pH value of rice field and improving nitrogen fertilizer utilization rate of rice field by using duckweed

A utilization rate and duckweed technology, applied in botany equipment and methods, applications, rice cultivation, etc., can solve the problems of low nitrogen utilization rate and unstable pH value of rice fields, etc., and achieve the effect of reducing volatilization

Pending Publication Date: 2022-07-08
YANGZHOU UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the present invention provides a method of using duckweed to control the pH value of paddy fields and improve the nitrogen utilization rate of paddy fields, which solves the problems of unstable pH value of existing paddy fields and low nitrogen utilization rate, and improves the efficiency of paddy fields. Nitrogen use efficiency and rice yield

Method used

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  • Method for controlling pH value of rice field and improving nitrogen fertilizer utilization rate of rice field by using duckweed
  • Method for controlling pH value of rice field and improving nitrogen fertilizer utilization rate of rice field by using duckweed
  • Method for controlling pH value of rice field and improving nitrogen fertilizer utilization rate of rice field by using duckweed

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Embodiment 1

[0026] A method for utilizing duckweed to control the pH value of paddy fields and improve the utilization rate of nitrogen fertilizer in paddy fields, comprising the following steps:

[0027] 1) Duckweed introduction, duckweed (Qingping or Ziping) in the seedling stage, and duckweed for transplanting rice in the seedling stage. Specifically: Duckweed 90 is introduced into the rice seedling field 6-8 days before transplanting and dried. -110 g / m 2 When transplanting, it is best to have duckweed sticking to the base of each seedling. When transplanting, keep the water layer of the paddy field at 2-4 cm. The introduction of duckweed for direct-seeding rice at the seedling stage is as follows: when the seedlings are at 3-4 leaf age, pass Irrigation of pond water for duckweed cultivation introduces duckweed into rice fields, such as Figure 1-2 shown;

[0028] 2) Duckweed is associated, and it can be managed according to the conventional high-yield rice field method after transp...

Embodiment 2

[0032] A method for utilizing duckweed to control the pH value of paddy fields and improve the utilization rate of nitrogen fertilizer in paddy fields, comprising the following steps:

[0033] 1) Introducing duckweed, introducing duckweed at the seedling stage, and transplanting rice at the seedling stage. Specifically, the duckweed is introduced into the rice seedling field 6-8 days before transplanting, and the duckweed is 90-110 g / m2 after drying. 2 When transplanting, it is best to have duckweed sticking to the base of each seedling. When transplanting, keep the water layer of the paddy field at 2-4 cm. The introduction of duckweed in direct-seeding rice is as follows: when the seedlings are at 3-4 leaf age, the Duckweed is introduced into paddy fields by pond water irrigation, such as Figure 1-2 shown;

[0034] 2) Associated with duckweed, promote or inhibit the growth of duckweed during the growth period, so that the duckweed just covers the water surface, and the thic...

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Abstract

The invention discloses a method for controlling the pH value of a rice field and improving the nitrogen fertilizer utilization rate of the rice field through duckweed in the field of agricultural production. The method comprises the following steps that 1, duckweed introduction is conducted, and duckweed is introduced in the seedling stage; (2) the duckweed is accompanied, growth of the duckweed is promoted or inhibited in the growth period, the duckweed is just fully distributed on the water surface, the total thickness of floating duckweed leaves is 1-3 mm, about 2-4 layers of duckweed are overlapped, and the dry weight of the duckweed is 20 +/-10 g/m < 2 > at the moment, the problems that an existing rice field is unstable in pH value and low in nitrogen fertilizer utilization rate are solved, the nitrogen fertilizer utilization rate of the rice field is increased, and the method can be used for rice planting.

Description

technical field [0001] The invention relates to the technical field of agricultural production, in particular to a method for controlling the temperature and pH value of soil and water in paddy fields. Background technique [0002] Atmospheric CO 2 The abnormal changes in temperature and the large loss of nitrogen fertilizer in paddy fields (mainly nitrogen volatilization) caused by the increase in concentration are two important problems faced by agricultural production today. The pH value of paddy water body varies greatly, especially before and after fertilization. The unstable pH value of paddy water body not only affects the yield and quality of rice, but also is an important cause of nitrogen loss in paddy fields when it is too high. Heavy application of nitrogen fertilizer is one of the most effective conditions to ensure high yield of rice, but it is also an important reason for the low utilization rate of nitrogen fertilizer and the large amount of loss. The prede...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/22A01G31/00A01K67/02A23K10/30A23K50/00
CPCA01G22/22A01G31/00A01K67/02A23K10/30A23K50/00Y02P60/21
Inventor 景立权李凡王训康
Owner YANGZHOU UNIV
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