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A drip irrigation method for protected cultivation of flue-cured tobacco based on reference crop water demand

A technology for crop water demand and facility cultivation, which is applied in the field of tobacco cultivation to achieve the effects of reducing costs, improving the efficiency of irrigation water use, and reducing the risk of environmental pollution

Active Publication Date: 2021-07-13
YUNNAN ACAD OF TOBACCO AGRI SCI
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  • 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

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  • A drip irrigation method for protected cultivation of flue-cured tobacco based on reference crop water demand
  • A drip irrigation method for protected cultivation of flue-cured tobacco based on reference crop water demand
  • A drip irrigation method for protected cultivation of flue-cured tobacco based on reference crop water demand

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A flue-cured tobacco facility cultivation drops based on reference crop demand, including the following specific steps:

[0052] Try the cauterization variety of K326.

[0053] (1) According to the weather data of nearly 10 years according to the planting area, the amount of reflection is calculated according to the following formula (ET 0 ):

[0054]

[0055] Where: ET 0 Evaporative amount for reference crops (mm · D -1 );

[0056] RN and G are surface-static radiothotostatic and soil thermal flux (MJ · M -2 · D -1 );

[0057] e a E d Saturated water volt pressure and actual water vapor pressure (KPA), respectively;

[0058] Δ is a saturated water vapor curve slope (kPa / ° C); gamma is a dry and wetting constant (kPa / ° C); T is average temperature (° C) at a high degree of 2 meter height;

[0059] (2) Calculate daily drip irrigation quota:

[0060] Q = R × ET 0 × P

[0061] Where: R is the water consumption coefficient, that is, the reference water quantity level; P i...

Embodiment 2

[0070] A flue-cured tobacco facility cultivation drops based on reference crop demand, including the following specific steps:

[0071] Try the cauterous variety of smoke 87.

[0072] (1) According to the weather data of nearly 10 years according to the planting area, the amount of reflection is calculated according to the following formula (ET 0 ):

[0073]

[0074] Where: ET 0 Evaporative amount for reference crops (mm · D -1 );

[0075] RN and G are surface-static radiothotostatic and soil thermal flux (MJ · M -2 · D -1 );

[0076] e a E d Saturated water volt pressure and actual water vapor pressure (KPA), respectively;

[0077] Δ is a saturated water vapor curve slope (kPa / ° C); gamma is a dry and wetting constant (kPa / ° C); T is average temperature (° C) at a high degree of 2 meter height;

[0078] (2) Calculate daily drip irrigation quota:

[0079] Q = R × ET 0 × P

[0080] Where: R is the water consumption coefficient, that is, the reference water quantity level; P i...

Embodiment 3

[0089] A flue-cured tobacco facility cultivation drops based on reference crop demand, including the following specific steps:

[0090] Try the cauterous variety of smoke 87.

[0091] (1) According to the weather data of nearly 10 years according to the planting area, the amount of reflection is calculated according to the following formula (ET 0 ):

[0092]

[0093] Where: ET 0 Evaporative amount for reference crops (mm · D -1 );

[0094] RN and G are surface-static radiothotostatic and soil thermal flux (MJ · M -2 · D -1 );

[0095] e a E d Saturated water volt pressure and actual water vapor pressure (KPA), respectively;

[0096] Δ is a saturated water vapor curve slope (kPa / ° C); gamma is a dry and wetting constant (kPa / ° C); T is average temperature (° C) at a high degree of 2 meter height;

[0097] (2) Calculate daily drip irrigation quota:

[0098] Q = R × ET 0 × P

[0099] Where: R is the water consumption coefficient, that is, the reference water quantity level; P i...

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Abstract

The invention discloses a drip irrigation method for facility cultivation of flue-cured tobacco based on reference crop water demand, which includes the following steps: (1) Calculate the daily reference crop water demand (evapotranspiration ET 0 ); (2) Calculate the daily drip irrigation quota according to the formula: Q=r×ET 0 ×p; (3) Irrigation: irrigate once every 6-8 days during the rooting period, and the single irrigation quota is the sum of the daily drip irrigation quota for 6-8 days; irrigate once every 2-4 days during the prosperous period, and single irrigation The quota is the sum of the daily drip irrigation quotas for 2-4 days; the mature period is irrigated once every 4-6 days, and the single irrigation quota is the sum of the drip irrigation quotas for 4-6 days. The present invention determines the amount of irrigation water based on the water demand at each stage of flue-cured tobacco facility cultivation. Compared with conventional full irrigation, the main agronomic traits of flue-cured tobacco in the present invention are not significant, the irrigation quota is reduced by 33.3%, and the utilization efficiency of irrigation water is increased by 66.0%. The utilization rate of nitrogen fertilizer and phosphorus fertilizer increased by 11.1% and 81.6% respectively, which is conducive to the improvement of tobacco leaf production efficiency.

Description

Technical field [0001] The present invention relates to the field of tobacco cultivation techniques, and more particularly to a flue-cured tobacco facing drops based on reference crop demand. Background technique [0002] The facility cultivation refers to an important cultivation method for producing a suitable environmental condition for crop growth in a season or region that is not suitable for crop exposure. For flue-cursive, although the use of open-air cultivation in tobacco agricultural production, the facility cultivation (mainly plastic greenhouses and sunlights) during the study of tobacco science, because it is not affected by season and venue to cultivate flue-cured tobacco, thereby great Shorten the test cycle and effectively improve the test efficiency and guarantee the smooth development of scientific research. [0003] At present, the irrigation management in the cultivation of the flue-cured tobacco is mostly dominated by empirical management: one is "seeing the ...

Claims

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Application Information

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Patent Type & Authority Patents(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
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