A real-time nitrogen fertilizer recommendation method based on facility crop canopy coverage and plant height

A technology for real-time recommendation and facility crops, applied in fertilization methods, fertilization devices, complex mathematical operations, etc., can solve problems such as difficult large-scale application, fast variety update cycle, etc., to improve accuracy, shorten establishment cycle, modeling and Apply the effect of low cost

Active Publication Date: 2021-11-02
INST OF SOIL SCI CHINESE ACAD OF SCI
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the update cycle of facility crop varieties is fast, and the diagnostic models that cost a lot of manpower and financial resources will also face rapid replacement, making it difficult for large-scale application in production

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A real-time nitrogen fertilizer recommendation method based on facility crop canopy coverage and plant height
  • A real-time nitrogen fertilizer recommendation method based on facility crop canopy coverage and plant height
  • A real-time nitrogen fertilizer recommendation method based on facility crop canopy coverage and plant height

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] From December 2017 to February 2018, celery planting experiments with different fertilizer application rates were carried out in the vegetable planting base of Zhoutie Town, Yixing City, and the plastic greenhouse was selected as the experimental site. Eight treatments with different nitrogen fertilizer application rates were set up, and each treatment was repeated three times, with a total of 24 crop planting plots. Nitrogen fertilizer is applied three times (three application ratio 3:4:3), and phosphorus fertilizer and potassium fertilizer are applied as base fertilizer at one time. Treatment settings and fertilizer application rates are shown in Table 1 below. The type of nitrogen fertilizer is urea, the type of phosphate fertilizer is calcium magnesium phosphate fertilizer, and the type of potassium fertilizer is potassium sulfate:

[0047] Table 1 The amount of nitrogen, phosphorus and potassium fertilizers used for each treatment of celery

[0048]

[0049] Af...

Embodiment 2

[0057] For the same field test in embodiment 1, the daily average temperature of the celery growth environment is continuously monitored, and the effective accumulated temperature is calculated, and according to the preset sampling cycle of 7 days, at each cycle collection time, the crowns in each celery planting area are collected respectively. layer coverage and plant height information until harvest;

[0058] Based on the date of preparation for recommended fertilization (45 days after transplanting), calculate the effective accumulated temperature △T of celery after transplanting to the reference day test (153.6°C), for each planting area except the optimal nitrogen application area (N4), the cumulative nitrogen application amount before the reference date and the corresponding cumulative nitrogen application amount of the optimal nitrogen application area plot Subtracting each other, the value is recorded as △F, and the amount of nitrogen fertilizer applied to each treatm...

Embodiment 3

[0066] From December 2018 to February 2019, celery was planted in plastic greenhouses in Zhoutie Town, Yixing City. Before transplanting, the nitrogen fertilization rate of celery was set at 200kg / hm 2 , according to the ratio of 3:4:3, the nitrogen fertilizer consumption of the three fertilization plans are 60, 80, 60kg / hm respectively 2 ; After the celery was transplanted, the daily average temperature of its growth environment was continuously monitored, the effective accumulated temperature was calculated, and the nitrogen nutrition diagnosis and recommended fertilization amount were calculated before the third fertilization of celery. Nitrogen application rate is 60kg / hm 2 , the effective accumulated temperature of celery on the day of topdressing is (△T test )=176.5 DEG C, the critical coverage curve and the critical plant height curve of the celery of substituting embodiment 1 are calculated and obtained C opt =0.57,H opt =55.01, the canopy coverage C of celery was t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a method for real-time recommendation of nitrogen fertilizer based on facility crop canopy coverage and plant height, which belongs to the field of agricultural planting technology, including: subtracting the optimal nitrogen application planting area from the nitrogen application amount of the non-optimal nitrogen application planting area The amount of nitrogen applied is calculated as △F, and at the same time, the recommended index R of nitrogen fertilizer in this non-optimal nitrogen application planting area is calculated, and the linear regression analysis is carried out on the △F value and the corresponding R value of all non-optimal nitrogen application planting areas to obtain Nitrogen fertilizer recommendation formula; after crops are planted, monitor the daily average temperature of the crop growth environment, calculate the crop nitrogen fertilizer recommendation index R value before topdressing the crops, and substitute the R value into the nitrogen fertilizer recommendation formula to obtain the corresponding nitrogen fertilizer difference △F. The above-mentioned nitrogen fertilizer difference △F plus the conventional nitrogen application amount of the optimal nitrogen application planting area in this topdressing is the real-time recommended amount of nitrogen fertilizer. The invention avoids the problem of inaccurate recommendation caused by a single feature when the error is large, improves the accuracy of recommended fertilization results, and greatly shortens the model establishment period.

Description

technical field [0001] The invention belongs to the technical field of agricultural planting, and in particular relates to a method for real-time recommendation of crop nitrogen fertilizer based on canopy coverage and plant height of facility crops. Background technique [0002] Compared with general open-air crops, facility crops have more costs for input management and production materials, and operators also expect higher returns. Survey data and literature data show that the annual nitrogen fertilizer application rate of my country's facility crops can reach up to 1000-2000kg / hm 2 , the amount of nitrogen fertilizer application is large, far exceeding the demand of crops, resulting in extremely low fertilizer utilization rate. At the same time, in the process of planting facilities in successive years, it is easy to cause problems such as soil compaction and salinization, which seriously affects the sustainable development of agriculture. . [0003] In recent years, ar...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): A01C21/00G06F17/11
CPCA01C21/005G06F17/11
Inventor 王远施卫明闵炬许纪元武星魁
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap