Estimation method of water consumption of greenhouse crop

A technology of water consumption and calculation method, which is applied in the field of agricultural water and soil engineering and facility cultivation, and can solve problems such as limitations

Inactive Publication Date: 2013-09-18
NORTHWEST A & F UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few studies on the water consumption of vegetables and protected horticultural crops, and the results obtained are generally limited to local climate conditions and specific greenhouse environments. Whether these results can be popularized and applied requires further experimental data to prove

Method used

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  • Estimation method of water consumption of greenhouse crop
  • Estimation method of water consumption of greenhouse crop
  • Estimation method of water consumption of greenhouse crop

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Experimental program
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Embodiment Construction

[0014] Concrete implementation of the present invention comprises the steps:

[0015] (1) Calculation of crop physiological coefficient α value:

[0016] The effective accumulated temperature GOD during the growth period is expressed as:

[0017] In the formula: T 1 is the daily average temperature on day i, and Tb is the growth base point temperature for growth and development in °C. It is the expression method of heat resources, the requirement of crops for heat index, and also expresses the sum of temperature required for a certain growth period or the whole growth period of crops.

[0018] Table 1 The growth base point temperature of vegetables

[0019]

[0020] The daily average temperature calculation formula is:

[0021] Ti = ( T 1 + T 2 + T 3 + . ...

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Abstract

The invention discloses an estimation method of a transpiration water consumption of a greenhouse crop. The estimation method is characterized by being conducted according to following steps: (1) a calculation of a physiological factor of the crop lies in calculating an effective accumulative temperature, which is calculated and obtained by utilizing an experience function relation between the physiological factor of the crop and the effective growth accumulative temperature, of a crop growth in the greenhouse; or in measuring a leaf area which is obtained by utilizing a relation expression between the physiological factor and the leaf area. (2) A calculation of an evaporation force in the greenhouse environment is to calculate and obtain an evaporation amount of a greenhouse reference crop according to a revised Penman formula; or to calculate and obtain according to the relation expression between the evaporation amount of the reference crop and the evaporation amount of an evaporation dish. (3) A calculation of a moisture stress factor lies in that a relatively effective moisture content of a soil is actually calculated, and the relatively effective moisture content is compared with a critical moisture content, and then the moisture stress factor is obtained by putting relatively effective moisture content and the critical moisture content into the corresponding experience formula. (4) The transpiration water consumption of the crop is obtained by multiplying the physiological factor of the crop, the water consumption of the reference crop and the moisture stress factor of the soil which are actually calculated.

Description

1 technical field [0001] The invention relates to the fields of agricultural water and soil engineering and facility cultivation, in particular to a method for measuring and calculating crop water consumption in a facility cultivation environment. 2 background technology [0002] With the development of my country's economy and the improvement of people's living standards, facility agriculture has developed rapidly, and the greenhouse facility industry has become the main mode of modern agriculture and new agriculture in my country. The proportion of water consumption for crop production in facilities to total agricultural water consumption has also increased significantly. Among them, plastic large and medium sheds and solar greenhouses and other facilities, which account for more than 95% of my country's facility agriculture area, have low utilization coefficients of irrigation water and space for water saving. Huge, strengthening the research on water consumption of crops ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/00
Inventor 李建明张大龙姚勇哲赵志华
Owner NORTHWEST A & F UNIV
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