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Land irrigation quota determining method

A technology for determining irrigation quotas and methods, which is applied in botany equipment and methods, watering devices, gardening, etc., and can solve the problem of calculation deviations of soil maximum water holding capacity and minimum water holding capacity, soil bulk density is not a constant value, and affects field conditions. Water holding capacity and other issues, to achieve the effect of simple operation, reduce labor loss, and reduce agricultural water waste

Inactive Publication Date: 2015-05-20
SHIHEZI UNIVERSITY
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] 1. For a piece of cultivated land, the bulk density of the soil is not a fixed value, and the bulk density will affect the field water holding capacity, resulting in a deviation in the calculation of the maximum water holding capacity and the minimum water holding capacity of the soil
[0013] 2. Different soil quality, sandy soil, loam soil, clay soil, the wetting body after soil irrigation is very different, and the movement of water is also different. The growth range of crop root system can be used to determine the depth of the planned wetting layer, but only rely on the depth of wetting layer Substantial deficiencies in the basis for irrigation may result in crop water stress or water loss

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0054] refer to figure 1 , figure 2 , a method for determining a land irrigation quota mainly includes the following steps:

[0055] (1) Fully irrigate the soil of the test field and cover it with film, let it stand for 45h, 47h, 49h or 50h, and drain the gravity water in the soil;

[0056] (2) Three test points are randomly selected in the test field to obtain soil samples. The soil is taken from the surface, and a soil sample is taken every 10 cm by using a soil drill until the depth of H, where H is the planned wetting layer Depth, the values ​​are 50cm, 60cm, 70cm, 80cm respectively; collect the soil samples taken into aluminum boxes and mark them;

[0057] (3), bring the soil sample back to the laboratory, weigh 20g, 22g, 26g or 30g of each soil sample respectively, dry the soil sample with the drying method, measure its moisture content and consider it to be the field holding time of the soil approximately. Water rate, and take the dried soil sample to measure the so...

Embodiment 5～8

[0084] refer to image 3 , Figure 4 , and embodiment 1-4 difference is: the selected loam test field, the bulk density of loam is 1.3~1.6g / cm 3 , The field water holding rate is between 15% and 27%, and the soil moisture during the irrigation period accounts for between 65% and 100% of the field water holding capacity.

[0085]

[0086]

[0087] Among them, the depth of the loam soil layer and the H-γ fitting function curve of the soil bulk density are as follows: image 3 As shown, the fitting function curve of loam soil depth and field water holding rate H-α is as follows Figure 4 shown.

[0088]

Embodiment 9～12

[0090] refer to Figure 5 , Figure 6 , and embodiment 1-4 is different in that: the selected clay test field, the bulk density of the soil is 1.1~1.5g / cm 3 , the field water holding rate is between 24% and 35%, and the soil moisture during the irrigation period accounts for between 65% and 100% of the field water holding capacity.

[0091]

[0092] The curve of clay soil layer depth and soil bulk density H-γ fitting function is as follows Figure 5 As shown, the curve of clay soil layer depth and field water holding rate H-α fitting function is as follows Figure 6 shown.

[0093]

[0094]

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Abstract

The invention relates to the field of water-saving irrigation, in particular to a land irrigation quota determining method. The land irrigation quota determining method mainly comprises the steps that film mulching is conducted on soil of an experimental field after the soil of the experimental field is fully irrigated; three experimental points are randomly selected in the experimental field to obtain soil samples; 20 g-30 g of each soil sample are weighed, and a field water-holding ratio of the soil and a soil volume-weight are obtained; management and calculation are conducted on the obtained data of the water-holding ratio and the volume-weight of the soil layer with the same depth of the three experimental points to obtain average values; scatter points of the obtained data are drawn on a coordinate system, computer software is utilized to draw an H-gamma, H-alpha fitting function curve chart, according to the fitting function curve chart, a maximum water volume M of one-time irrigation of the soil is obtained through formulas. The land irrigation quota determining method can greatly reduce the waste of agricultural water, and the land irrigation quota determining method is economical and practical.

Description

technical field [0001] The invention relates to the field of water-saving irrigation, in particular to a method for determining a land irrigation quota. Background technique [0002] As a basic industry in my country, agriculture accounts for about 70% of the total water consumption in the country. However, the low utilization efficiency of agricultural water in my country and serious waste have become important factors restricting the development of agriculture and sustainable economic and social development in my country. [0003] At present, although water-saving irrigation is widely used in Xinjiang, in many cases, the use of irrigation systems and the determination of irrigation quotas are only determined based on years of farming experience, and there is no widely applicable significance. specific calculation method. If a method for accurately determining the irrigation quota can be obtained through experiments, the utilization coefficient of irrigation water can be f...

Claims

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Application Information

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IPC IPC(8): A01G25/16
CPCA01G25/16
Inventor 何新林刘洪光史尚渝龚萍张杰叶建威阿尔娜古丽刘昭希葛阳田海博
Owner SHIHEZI UNIVERSITY
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