Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for recommending application rate of crop nitrogenous fertilizers based on soil nutrient balance

A technology of soil nutrients and recommended methods, applied in the direction of fertilization methods, applications, fertilization devices, etc., can solve problems that have not been seen in reports, and achieve the effect of maintaining soil nutrient balance

Inactive Publication Date: 2011-01-19
JIANGSU ACAD OF AGRI SCI
View PDF0 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the recommended method of crop nitrogen fertilizer application rate based on soil nutrient balance and crop nitrogen harvest index as the index value has not been reported

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
  • Method for recommending application rate of crop nitrogenous fertilizers based on soil nutrient balance
  • Method for recommending application rate of crop nitrogenous fertilizers based on soil nutrient balance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1 (experimental group)

[0012] Test crop: Rapeseed

[0013] Nitrogen fertilizer, provided by Jinling Petrochemical Plant, containing N46%

[0014] experiment method:

[0015] In the first year, the fertilizer experiment was carried out in the rapeseed field. The method was to set up three groups in the field for parallel experiments. Each group had five test areas with different nitrogen application levels x. The aboveground straw and grains of the rapeseed were harvested at the maturity stage of the rapeseed. Through the classic The nitrogen content of rapeseed stalks and grains was determined by the soil agrochemical analysis method (Bao Shidan. Soil Agrochemical Analysis [M]. Beijing: China Agricultural Science and Technology Press, 2000, 25-110). The weight of rapeseed straws and grains was multiplied by the corresponding The nitrogen content of the rapeseed can be calculated by calculating the nitrogen taken away after the rapeseed is received, and th...

Embodiment 2

[0018] Embodiment 2 (control group)

[0019] Test crop: Rapeseed

[0020] Nitrogen fertilizer, same as embodiment 1

[0021] In the first year, the fertilizer test was carried out in the rapeseed field. The method was to set up three groups in the field for parallel experiments, and each group had five test areas with different nitrogen application levels x, and calculate the rapeseed grains under the five different nitrogen application levels x Yield y, use the Excell table to establish the quadratic function equation of y and x y=-0.0168x 2 +9.4525x+1643.8, deriving the quadratic equation to get dy / dx=-0.0336x+9.4525; do a correlation test, significant or extremely significant, take the value of x when dy / dx=0 as the recommended nitrogen application amount for the highest yield, The value of x when dy / dx=px / py is used as the recommended nitrogen application rate for optimal economic yield (px and py refer to the market price of nitrogen fertilizer and rapeseed, respectivel...

Embodiment 3

[0024] Embodiment 3 (comparison of data)

[0025] As can be seen from Table 1 and Table 2, although the best economically recommended nitrogen application rate in the control group is very close to the recommendation in the experimental group of the present invention, in the process of recommending calculation, due to the price impact of fertilizers and agricultural products that need to be considered by the control group , relatively cumbersome; and the recommendation of the present invention is only related to fertilization technology in the process of recommendation calculation, and does not need to consider the market price, which is relatively simple.

[0026] The recommended nitrogen application rate for the highest yield in the control group is 281.3kgN / hm 2 With the recommended nitrogen application rate 245.8kgN / hm in the experimental group of the present invention 2 Substitute into the quadratic function equation of embodiment 2 respectively: y=-0.0168x 2 +9.4525x+1...

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 relates to a method for recommending application rate of crop nitrogenous fertilizers based on soil nutrient balance. The method is characterized in that the field fertilizer test is carried out to establish nitrogenous fertilizer application rate X and crop nitrogen harvest index Y; the functional relation is established by software; according to the established functional relation, the value of the crop nitrogen harvest index Y is caused to be within the interval of 0.863-1; afterwards, the value of the nitrogenous fertilizer application rate X is worked out by backwards calculation and the value is used as the recommended application rate of crop nitrogenous fertilizer for the crop in the coming year. The method has the advantages that addition of the extra field fertilizer test is not needed and only rearrangement of the initial data is needed based on the launched soil testing and formulated fertilization field fertilizer test. As shown in the fertilizer response function curve of crop yield and fertilizing amount, the high yield region of the crop is a platform with very wide fertilizing amount range, the change of the fertilizer use level within the range of the platform exerts little influence on the yield. The recommended application rate of crop nitrogenous fertilizer of the invention can balance the soil nutrient and is beneficial to sustainable development of agriculture.

Description

technical field [0001] The present invention relates to the recommended method of nitrogen fertilizer application rate for crops. Background technique [0002] Crop growth requires nitrogen fertilizers, and the methods for recommending the amount of nitrogen fertilizer for crops can be divided into two categories, that is, the recommendation method based on soil and plant tests and the recommendation method based on fertilizer effect function. There are not many applications in production, and the latter method is commonly used in soil testing and formula fertilization in my country. This method gives two recommended nitrogen fertilizer dosages for crops: the recommended nitrogen fertilizer dosage for the highest yield and the best economical nitrogen fertilizer recommended dosage. When applying the highest yield nitrogen fertilizer, while obtaining high crop yield, there will be a nitrogen surplus in the soil, which increases the risk of loss to the environment; and the rec...

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 Applications(China)
IPC IPC(8): G06F19/00A01C21/00
Inventor 宁运旺张永春朱德进鲁剑巍汪吉东许仙菊胡永红
Owner JIANGSU ACAD OF AGRI SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com