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Nitrogen topdressing method implemented through real-time diagnosis in wheat jointing stage

A technology for jointing and wheat is applied in the field of real-time and rapid diagnosis of topdressing nitrogen fertilizer in the jointing stage of wheat, which can solve the problems of inability to quantitatively measure, fade leaf color, and reduce yield, and achieve the goal of saving fertilizer, improving fertilizer efficiency, and reducing the application of nitrogen fertilizer. Effect

Inactive Publication Date: 2012-10-03
YANGZHOU UNIV
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Problems solved by technology

However, unreasonable application of jointing fertilizer will lead to deterioration of the population and decrease in yield. For this reason, a morphological diagnostic index for topdressing nitrogen with jointing fertilizer is proposed: the leaf color fades, or experts are invited to diagnose and guide on-site
It can be seen that the current level of joint fertilizer application is still based on empirical diagnosis, which cannot be quantitatively measured, and it is impossible to accurately determine how much nitrogen fertilizer can be topdressed under what kind of leaf color conditions

Method used

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  • Nitrogen topdressing method implemented through real-time diagnosis in wheat jointing stage
  • Nitrogen topdressing method implemented through real-time diagnosis in wheat jointing stage
  • Nitrogen topdressing method implemented through real-time diagnosis in wheat jointing stage

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example 1

[0026] Example 1 In the field of Yangzhou, medium-gluten wheat Yangmai 16 and weak-gluten wheat Yangmai 15 were selected, and the amount of nitrogen (pure nitrogen) applied as base fertilizer was 7kg / mu, and phosphorus (P 2 o 5 ) amount is 8kg / mu, potassium (K 2 O) The amount is 8kg / mu, the basic seedling is 140,000 / mu, and it is sown on November 1st. At the jointing stage of the medium-gluten wheat Yangmai 16 and the weak-gluten wheat Yangmai 15, select fields with similar leaf color, topdressing 0 (no application), the application rate recommended by the patent of the present invention, less application or too much application, It can be seen that the yield level of the treatment according to the application rate recommended by the patent of the present invention is higher, which is significantly higher than that of the treatment without topdressing (Table 3).

[0027] Table 3 Effects of different topdressing nitrogen amounts at jointing stage on wheat grain yield and qual...

example 2

[0029] Example 2 In 2008-2009, the medium-gluten wheat Yangmai 16 and the weak-gluten wheat Yangmai 13 fields were selected in the Datiantian. 2 o 5 ) amount is 7.5~9kg / mu, potassium (K 2 O) The amount is 7.5-9kg / mu, the basic seedling is 160,000 / mu, and it is sown from November 1st to 3rd. At the jointing stage of the medium-gluten wheat Yangmai 16 and the weak-gluten wheat Yangmai 13, select fields with similar leaf colors, topdressing 0 (no application), the application amount recommended by the patent of the present invention, and excessive application. It can be seen that, According to the application rate recommended by the patent of the present invention, the yield level of the treatment was higher, which was significantly higher than that of the treatment without topdressing (Table 4).

[0030] Table 4 Effects of different topdressing nitrogen amounts at jointing stage in Dafeng demonstration area on wheat grain yield and quality

[0031]

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Abstract

The invention belongs to the field of agriculture, and specifically relates to a nitrogen topdressing method implemented through real-time diagnosis in a wheat jointing stage. The method comprises the following steps: in a wheat jointing stage, determining the mean value of SPAD (relative content of leaf chlorophyll) values of wheat leaves in fields; and then, according to the actually-measured mean value of SPAD values of wheat leaves, carrying out nitrogen topdressing in combination with the types of wheat. After an operation of nitrogen topdressing is performed according to the method disclosed by the invention, the application amount of a nitrogen fertilizer can be effectively controlled, and unnecessary fertilizer applications are reduced, thereby facilitating the improvement of the fertilizer efficiency, achieving high yield and high efficiency, and reducing the environmental pollution caused by excess nitrogen fertilizer application.

Description

technical field [0001] The invention belongs to the field of agriculture, and in particular relates to a method for real-time rapid diagnosis of topdressing nitrogen fertilizer at the jointing stage of wheat. Background technique [0002] Nitrogen topdressing at the jointing stage has become one of the key factors for higher and higher yields of wheat. However, unreasonable application of jointing fertilizer will lead to group deterioration and yield decline. Therefore, a morphological diagnostic index for topdressing nitrogen with jointing fertilizer is proposed: leaf color fades, or experts are invited to diagnose and guide on-site. It can be seen that the current level of jointing fertilizer application is still based on empirical diagnosis, which cannot be quantitatively measured, and it is impossible to accurately determine how much nitrogen fertilizer can be topdressed under what kind of leaf color conditions. Contents of the invention [0003] The purpose of the pr...

Claims

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Application Information

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IPC IPC(8): A01C21/00
Inventor 朱新开李春燕丁锦锋王亚飞郭文善
Owner YANGZHOU UNIV
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