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Test method for simulating partial root zone irrigation through longitudinal water difference distribution

A technology of distribution simulation and test method, applied in the fields of botanical equipment and methods, automatic watering device, application, etc., can solve problems such as being unsuitable for studying cotton water use efficiency, etc., and achieve the effect of convenient observation

Active Publication Date: 2021-06-08
SHANDONG COTTON RES CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the split-root technology and grafting split-root technology used to study the mechanism of partial root zone irrigation to improve water use efficiency mainly simulate the differential distribution of water in the horizontal plane, which is not suitable for studying the mechanism of the differential distribution of water in the vertical section of the soil on the water use efficiency of cotton.

Method used

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  • Test method for simulating partial root zone irrigation through longitudinal water difference distribution
  • Test method for simulating partial root zone irrigation through longitudinal water difference distribution
  • Test method for simulating partial root zone irrigation through longitudinal water difference distribution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] as attached figure 1 , 2 As shown, the special test device in this embodiment is mainly composed of an upper box 1, a lower box 2, and a communication tube 3, and each part is not made of plexiglass.

[0046] The upper box 1 is in the shape of a square funnel, the upper part is a square tube with a length of 20cm, a width of 10cm and a height of 3cm; . The connecting tube 3 is 1.5 cm high, and the cross section is a square with a side length of 1 cm. Both ends of the upper box 1 in the length direction are fixed with support columns 4 with a length of 2.5 cm, and the lower ends of the support columns 4 are processed with tabs 5 . The lower port of the communication pipe 3 and the tab 5 are on the same plane. Two drainage holes 6 with a diameter of 0.5 cm are respectively machined on the inclined surfaces on both sides of the upper box 1 in the width direction, which are slightly lower than the position along the plane of the communication pipe 3 . Both the two drai...

Embodiment 2

[0049] as attached image 3 , 4As shown, the special test device in this embodiment is mainly composed of an upper box 1, a lower box 2, and a communication tube 3, and each part is not made of plexiglass.

[0050] The upper box 1 is in the shape of a cylindrical funnel, the upper half is cylindrical with a radius of 10 cm and a height of 4 cm; the bottom surface of the lower half is inclined downward from the lower end of the upper half, and is connected with the lower mouth of the communication pipe 3 at the center of the bottom. . The connecting tube 3 is 2 cm high, and the cross section is a circle with a radius of 0.5 cm. Four support columns 4 with a length of 1 cm are fixed at the lower end of the side wall of the upper box 1 , and the lower end of the support columns 4 is processed with a tab 5 . The lower port of the communication pipe 3 and the tab 5 are on the same plane. Two drainage holes 6 with a diameter of 0.5 cm are machined at the lower end of the side wa...

Embodiment 3

[0054] According to the maximum water-holding capacity of the substrate used, mix an appropriate amount of water with the substrate to make it reach 70-80% of the maximum water-holding capacity, and put the mixed substrate in the upper box of Example 1, about 1cm away from the edge of the upper layer, Weigh and record the weight of the loaded matrix. Fill the lower box with the mixed substrate, weigh and record the weight of the loaded substrate. Put the tabs on both sides of the lower part of the upper box into the slot of the lower box, so that the upper and lower boxes are stuck and fixed, so that the matrix in the communication tube of the upper box is in close contact with the matrix in the lower box without leaving a gap. If you need to move it later, you should support the bottom of the lower box. Put cotton seeds in the center of the upper box, just above the orifice of the connecting pipe, and the depth of the seeds is about 1.5cm. Cotton seedlings emerged 1 week la...

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Abstract

The invention discloses a test method for simulating partial root zone irrigation through longitudinal water difference distribution, and belongs to the technical field of crop planting tests. A cotton planting method is characterized in that a special test device is used for testing, the special test device comprises an upper layer box and a lower layer box, the upper layer box and the lower layer box are open containers containing planting matrixes, the upper layer box is detachably arranged above the lower layer box, a communicating pipe is arranged at the bottom of the upper layer box, the upper end of the communicating pipe is higher than the bottom face of the upper layer box, and the lower end of the communicating pipe is not higher than the upper surfaces of the planting matrixes in the lower layer box. Compared with the prior art, the method can accurately simulate partial root zone irrigation achieved by adjusting the irrigation amount under the field under-film drip irrigation condition through the special test, and a good foundation is provided for researching the mechanism of the irrigation technology for increasing the crop water utilization rate.

Description

technical field [0001] The invention relates to the field of crop planting experiments, and specifically provides a method for simulating partial root zone irrigation by longitudinal water differential distribution. Background technique [0002] Partial root zone irrigation is a new type of water-saving irrigation technology proposed in recent years. This technology keeps a part of the soil vertical profile or horizontal plane dry, while irrigating another part of the area wet, and uses the signal substances produced by the root system in arid areas to regulate stomatal opening. It can significantly improve water use efficiency without affecting other physiological activities of plants. The early implementation of this technology was mainly to irrigate part of the root system of fruit trees (1 / 4, 2 / 4, 3 / 4), or to irrigate cotton, corn and other crops in interlaced (furrow) irrigation. These irrigation methods are mainly Differential distribution of moisture is achieved in t...

Claims

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Application Information

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IPC IPC(8): A01G22/50A01G9/029A01G27/00
CPCA01G22/50A01G9/0293A01G9/0295A01G9/0299A01G27/00
Inventor 罗振孔祥强唐薇卢合全李振怀徐士振田立文
Owner SHANDONG COTTON RES CENT
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