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

Drip irrigation method for protected cultivation of tobacco based on reference crop water demand

A water-requiring and protected cultivation technology for crops, applied in the field of tobacco cultivation, to reduce costs, improve irrigation water utilization efficiency, and reduce the risk of environmental pollution

Active Publication Date: 2020-02-21
YUNNAN ACAD OF TOBACCO AGRI SCI
View PDF12 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in current empirical irrigation, the present invention provides a drip irrigation method for facility cultivation of flue-cured tobacco based on reference crop water demand, so as to improve the efficiency of irrigation water management and ensure the growth and development of tobacco plants

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
  • Drip irrigation method for protected cultivation of tobacco based on reference crop water demand
  • Drip irrigation method for protected cultivation of tobacco based on reference crop water demand
  • Drip irrigation method for protected cultivation of tobacco based on reference crop water demand

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A method for drip irrigation of flue-cured tobacco facility cultivation based on reference crop water demand, comprising the following specific steps:

[0052] The variety of flue-cured tobacco tested was K326.

[0053] (1) According to the meteorological data of the planting area in the past 10 years, the reference crop evapotranspiration (ET 0 ):

[0054]

[0055] Where: ET 0 is the reference crop evapotranspiration (mm d -1 );

[0056] Rn and G are surface static radiation and soil heat flux, respectively (MJ m -2 d -1 );

[0057] e a and e d Respectively, saturated water vapor pressure and actual water vapor pressure (kPa);

[0058] Δ is the slope of the saturated water vapor pressure curve (kPa / °C); γ is the psychrometer constant (kPa / °C); T is the average temperature at a height of 2 meters (°C);

[0059] (2) Calculate the daily drip irrigation quota according to the following formula:

[0060] Q=r×ET 0 ×p

[0061] In the formula: r is the irrigati...

Embodiment 2

[0070] A method for drip irrigation of flue-cured tobacco facility cultivation based on reference crop water demand, comprising the following specific steps:

[0071] The variety of flue-cured tobacco tested was Yunyan 87.

[0072] (1) According to the meteorological data of the planting area in the past 10 years, the reference crop evapotranspiration (ET 0 ):

[0073]

[0074] Where: ET 0 is the reference crop evapotranspiration (mm d -1 );

[0075] Rn and G are surface static radiation and soil heat flux, respectively (MJ m -2 d -1 );

[0076] e a and e d Respectively, saturated water vapor pressure and actual water vapor pressure (kPa);

[0077] Δ is the slope of the saturated water vapor pressure curve (kPa / °C); γ is the psychrometer constant (kPa / °C); T is the average temperature at a height of 2 meters (°C);

[0078] (2) Calculate the daily drip irrigation quota according to the following formula:

[0079] Q=r×ET 0 ×p

[0080] In the formula: r is the irr...

Embodiment 3

[0089] A method for drip irrigation of flue-cured tobacco facility cultivation based on reference crop water demand, comprising the following specific steps:

[0090] The variety of flue-cured tobacco tested was Yunyan 87.

[0091] (1) According to the meteorological data of the planting area in the past 10 years, the reference crop evapotranspiration (ET 0 ):

[0092]

[0093] Where: ET 0 is the reference crop evapotranspiration (mm d -1 );

[0094] Rn and G are surface static radiation and soil heat flux, respectively (MJ m -2 d -1 );

[0095] e a and e d Respectively, saturated water vapor pressure and actual water vapor pressure (kPa);

[0096] Δ is the slope of the saturated water vapor pressure curve (kPa / °C); γ is the psychrometer constant (kPa / °C); T is the average temperature at a height of 2 meters (°C);

[0097] (2) Calculate the daily drip irrigation quota according to the following formula:

[0098] Q=r×ET 0 ×p

[0099] In the formula: r is the irr...

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 discloses a drip irrigation method for protected cultivation of tobacco based on reference crop water demand, which comprises the steps: (1) calculating daily reference crop water demand(evapotranspiration ET0) according to a formula based on meteorological data of a region in recent 10 years; (2) calculating daily drip irrigation quota according to the formula: Q=r*ET0*p; and (3) carrying out irrigation, to be specific, irrigating once every 6-8 days in root extending stage, single irrigation quota being a sum of daily drip irrigation quotas within 6-8 days; irrigating once every 2-4 days in prosperous growth stage, single irrigation quota being a sum of daily drip irrigation quotas within 2-4 days; and irrigating once every 4-6 days in maturation stage, single irrigation quota being a sum of daily drip irrigation quotas within 4-6 days. According to the invention, the irrigation amount is determined based on the water demand of each stage of protected cultivation of tobacco; compared with conventional full irrigation, the method has the advantages that the main agronomic characteristics of tobacco are not significant, the irrigation quota is decreased by 33.3%, theirrigation water utilization efficiency is increased by 66.0%, the utilization rates of nitrogen fertilizer and phosphorus fertilizer are respectively increased by 11.1% and 81.6%, and tobacco production benefit is can be improved.

Description

technical field [0001] The invention relates to the technical field of tobacco cultivation, in particular to a drip irrigation method for facility cultivation of flue-cured tobacco based on reference crop water demand. Background technique [0002] Facility cultivation refers to an important cultivation method that uses specific protective equipment to create suitable environmental conditions for crop growth in seasons or areas that are not suitable for crop open field cultivation. For flue-cured tobacco, although open-air cultivation is used in tobacco agricultural production, facility cultivation (mainly plastic greenhouses and solar greenhouses) is very important in the process of tobacco scientific research. Since flue-cured tobacco is cultivated without being affected by seasons and sites, it is greatly improved. Shorten the test period and effectively improve the test efficiency to ensure the smooth development of scientific research. [0003] At present, the irrigati...

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): A01G25/00G06Q10/06G06Q50/02
CPCA01G25/00G06Q10/06315G06Q50/02Y02A40/22
Inventor 马二登张瑞勤徐兴阳代块高天刘剑金殷红惠孙军伟胡志明贺彪耿少武李江舟陶永萍黄坤徐照丽李军营邓小鹏童文杰赵正雄张晓海姜永雷
Owner YUNNAN ACAD OF TOBACCO 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