Pot-tray precise nitrogen application seedling raising method for controlling nitrogen loss of rice field

A nitrogen and paddy field technology, applied in fertilization methods, fertilization devices, rice cultivation and other directions, to achieve the effects of promoting seedling biomass and nutrient accumulation, reducing concentration, and improving absorption and utilization rate

Pending Publication Date: 2022-05-27
INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of applying controlled-release nitrogen fertilizer at the seedling stage while raising seedlings in pots, and bringing fertilizer into the field with complete root balls has not been reported yet.

Method used

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  • Pot-tray precise nitrogen application seedling raising method for controlling nitrogen loss of rice field
  • Pot-tray precise nitrogen application seedling raising method for controlling nitrogen loss of rice field
  • Pot-tray precise nitrogen application seedling raising method for controlling nitrogen loss of rice field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for raising rice seedlings with precision nitrogen fertilization in pots and pans for controlling nitrogen loss in paddy fields, comprising the following steps:

[0041] (1) Prepare the original paddy soil, controlled-release nitrogen fertilizer and pot seedling raising trays; the controlled-release nitrogen fertilizer contains 42.5% N, and the nutrient release period when the cumulative nitrogen release in 25°C water is greater than 80% is 160 days; pot seedlings Seedling tray 200 holes (length 54cm x width 28cm x height 4.3cm, aperture diameter 1cm x height 4.3cm).

[0042] (2) According to the nitrogen application rate in the field 165kg / hm 2 , The transplanting density is 225000 holes / hm 2 The amount of controlled-release nitrogen fertilizer applied to the plug was calculated, and the amount of nitrogen fertilizer applied to each portion of the original soil of the pot paddy field was 345 g.

[0043] (3) Mix the controlled-release nitrogen fertilizer with t...

Embodiment 2

[0047] A method for raising rice seedlings with precision nitrogen fertilization in pots and pans for controlling nitrogen loss in paddy fields, comprising the following steps:

[0048] (1) Prepare the original paddy soil, controlled-release nitrogen fertilizer and pot seedling raising trays; the controlled-release nitrogen fertilizer contains 40% N, and the nutrient release period when the cumulative nitrogen release in 25°C water is greater than 80% is 180 days; pot seedlings Seedling tray 200 holes (length 54cm x width 28cm x height 4.3cm, aperture diameter 1cm x height 4.3cm).

[0049] (2) According to the nitrogen application rate in the field 270kg / hm 2 , The transplanting density is 250,000 holes / hm 2 The amount of controlled-release nitrogen fertilizer applied to the plug tray was calculated, and the calculated amount of nitrogen fertilizer in the original soil of the pot pan paddy field was 540 g.

[0050] (3) Mix the controlled-release nitrogen fertilizer with the ...

Embodiment 3

[0054] A method for raising rice seedlings with precision nitrogen fertilization in pots and pans for controlling nitrogen loss in paddy fields, comprising the following steps:

[0055] (1) Prepare artificial seedling raising substrate, controlled-release nitrogen fertilizer and pot seedling raising tray; artificial seedling raising substrate is made by mixing rice husk, peat and vermiculite in a mass ratio of 2:1:1; the N content of controlled-release nitrogen fertilizer is 45%, The nutrient release period was 170 days when the cumulative nitrogen release in 25°C water was greater than 80%; 200 holes in the pot seedling raising tray (length 54cm×width 28cm×height 4.3cm, aperture diameter 1cm×height 4.3cm).

[0056] (2) According to the nitrogen application rate in the field 240kg / hm 2 , The transplanting density is 240000 holes / hm 2 The amount of controlled-release nitrogen fertilizer applied to the plug tray was calculated, and the calculated amount of nitrogen fertilizer a...

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Abstract

The invention provides a pot-tray precise nitrogen application seedling raising method for controlling nitrogen loss of a rice field, and belongs to the technical field of rice cultivation. The seedling raising method comprises the following steps: applying a nitrogen fertilizer required in the whole growth period of rice into a seedling raising substrate, performing rice seedling raising by utilizing a pot seedling raising tray, and transplanting obtained rice seedling root clusters with the fertilizer, the nitrogen fertilizer is applied in a controlled-release nitrogen fertilizer form. According to the rice seedling raising method adopting the precise nitrogen application in the pot tray, the seedling quality can be improved, the rice yield is guaranteed, the content of nitrogen in different forms in field surface water is effectively reduced, and the nitrogen emission reduction potential of the rice field is improved; fertilization frequency is reduced, labor is saved, and rice operation efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of rice cultivation, and in particular relates to a method for raising rice seedlings with precision nitrogen fertilization in pots and pans for controlling nitrogen loss in paddy fields. Background technique [0002] Excessive input of nitrogen fertilizer in paddy fields has become a common phenomenon, threatening the ecological environment of farmland. In particular, nutrients such as nitrogen and phosphorus enter surface water and groundwater, causing eutrophication of water bodies and nitrate pollution of groundwater. In particular, rice is fertilized with heavy base tiller fertilizer. At this time, the nitrogen demand for rice growth is low, and the coupling of base tiller fertilizer and rainfall aggravates the loss of nitrogen and phosphorus in rice fields and non-point source pollution. Therefore, according to the law of rice demand for fertilizer, fertilizer should be provided in the critical period...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/22A01C21/00
CPCA01G22/22A01C21/005Y02P60/21
Inventor 刘宏斌孙巧玉杨越超王玉峰谭可菲孙文涛侯立刚彭畅逄焕成范先鹏王洪媛
Owner INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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