Method for constructing cauliflower spectral nitrogen nutrition diagnosis model

A nutritional diagnosis, spectral nitrogen technology, applied in color/spectral characteristic measurement, material analysis by optical means, measuring device, etc., to achieve the effect of reducing application amount, ensuring yield quality, and not reducing crop yield

Pending Publication Date: 2021-01-26
云南新土壤农业科技有限公司 +1
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Problems solved by technology

The method of the present invention can be used to guide the optimal application rate of nitrogen fertilizer for cauliflower, without causing excessive or untimely application of nitrogen fertilizer, improving the utilization rate of nitrogen fertilizer for cauliflower, reducing the application of chemical fertilizers, and effectively solving the problem between current agricultural development and the environment. between problems

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  • Method for constructing cauliflower spectral nitrogen nutrition diagnosis model
  • Method for constructing cauliflower spectral nitrogen nutrition diagnosis model

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Effect test

Embodiment 1

[0035] A construction method of a broccoli spectrum nitrogen nutrition diagnostic model of the present invention comprises the following steps:

[0036] The first step is to investigate the conventional fertilization amount of cauliflower in the planting area, and obtain the routine nitrogen fertilizer application amount of cauliflower.

[0037] The second step is to set up different nitrogen level test groups for the conventional nitrogen fertilization rate obtained, ①N0 no nitrogen; ②N1 1 / 2 of the conventional nitrogen rate; ③N2 conventional nitrogen application; ④N3 3 / 2 of the conventional nitrogen rate; ⑤N4 conventional 4 / 2 of nitrogen application rate; ⑥5 / 2 of N5 conventional nitrogen application rate. Phosphorus and potassium application rates for all treatments were conventional application rates.

[0038] The third step is to use the GreenSeeKer spectrometer to obtain the spectral data of the cauliflower canopy: the acquisition time is after the first dressing of the ca...

Embodiment 2

[0055] In this embodiment, the cultivation of cauliflower in Chengjiang City, Yuxi City, Yunnan Province is taken as an example to verify the feasibility of the method of the present invention.

[0056] Step 1: According to the survey, the total amount of nitrogen applied to each crop of cauliflower is 255kg / hm 2 , applying P 2 o 5 267.75kg / hm 2 , K 2 O is 267.75kg / hm 2 .

[0057] Step 2: Set up different nitrogen level test groups based on the conventional fertilization rate obtained from the investigation in step 1, ①N0 without nitrogen; ②N1 1 / 2 of the conventional nitrogen rate; ③N2 conventional nitrogen rate; ④N3 3 / 2 of the conventional nitrogen rate ; ⑤ 4 / 2 of the conventional nitrogen application rate of N4; ⑥ 5 / 2 of the conventional nitrogen application rate of N5, and all phosphorus and potassium application rates are conventional application rates.

[0058] Step 3: Test layout: The test site is evenly prepared for soil moisture: the plot is used as a tall border...

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Abstract

The invention relates to a cauliflower spectral nitrogen nutrition diagnosis model construction method, a normalized difference vegetation index (NDVI) value is used to establish a nitrogen application mathematical model N=[83.079ln(x1)-203.27-0.172 e8.2176*2] / b based on the plant nitrogen absorption amount, where N is the cauliflower nitrogen application amount, x1 is a fixed number of days, x2 is an NDVI measured value, and b is fertilizer utilization rate. The method can be used for guiding the optimal nitrogen fertilizer application amount of the cauliflower, excessive application or untimely application of the nitrogen fertilizer cannot be caused, the utilization rate of the nitrogen fertilizer of the cauliflower is increased, application of chemical fertilizer is reduced, and the problem between current agricultural development and the environment is effectively solved.

Description

technical field [0001] The invention belongs to the field of plant nutrition diagnosis, and relates to a plant nitrogen nutrition diagnosis fertilization technology, in particular to the construction field of a broccoli spectral nitrogen nutrition diagnosis model. Background technique [0002] Spectral nutrition diagnosis is the main method of modern nitrogen nutrition diagnosis technology, which can solve the problems of excessive and untimely fertilization of crops. Different diagnostic methods have different characteristics. Although the traditional crop morphology diagnosis is very simple, it is greatly affected by the factors of the diagnoser himself. Different diagnosers have different diagnostic criteria, which leads to large diagnostic errors. Laboratory diagnosis is the most recognized diagnostic method. Accurate nitrogen nutrition diagnosis results are accepted by the public, but it is more destructive and will affect crop yield. If the lack of elements can not be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
CPCG01N21/314Y02P60/21
Inventor 彭银张仁礼达布希拉图
Owner 云南新土壤农业科技有限公司
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