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A method and system for improving soybean water use efficiency

A soybean and water technology, applied in the field of farmland management measures and systems, can solve the problems of crop growth, weak growth, crop yield reduction, etc., and achieve the effects of improving soil moisture and fertility, reducing damage and flow, and maintaining soil moisture and fertility.

Active Publication Date: 2020-04-21
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method will cause "injury" at the root-cut part, and the liquid flowing out from the root-cut part is rich in nutrients needed for crop growth. If the loss is too much, it will cause weak growth, and the crop growth will be affected for a period of time after the root is cut. The necrosis of the cut root causes crop yield reduction or even withering

Method used

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  • A method and system for improving soybean water use efficiency
  • A method and system for improving soybean water use efficiency
  • A method and system for improving soybean water use efficiency

Examples

Experimental program
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Embodiment 1

[0032] This embodiment is a method for improving soybean water use efficiency. The steps of the method are as follows:

[0033] (1) Steps for assessing the degree of crop drought: first evaluate the degree of drought in different growth stages of crops under the long-term historical sequence, and evaluate the true degree of drought in the current growth period; if: the true degree of drought is greater than the historical degree of drought, and the historical degree of drought The evaluation shows that the drought is a strengthening trend, that is, the drought degree in the next growth period is greater than that in the current growth period, so the amount of root cutting needs to be determined according to the true drought degree in the current growth period.

[0034] Drought assessment: Calculations of Palmer's method and modified PDSI index can be used.

[0035] (1) Palmer method: Palmer (Palmer, translated as Palmer) believes that the drought period is a period of continu...

Embodiment 2

[0080] This embodiment is an improvement of the first embodiment, and it is a refinement of the first embodiment about the location of root removal. The root-cutting position described in this embodiment is from both sides of the main stem l 1 =3.8cm, l 2 =3.5cm, l 3 =3.0cm, l 4 = 2.5cm cm, see figure 1 , 2 , pruning depth h For: 20 cm vertical undercut, see figure 1 , the amount of cut root is 10%, 20%, 30%, 40% respectively.

[0081] The general distribution trend of soybean roots in the soil is: from the vertical direction, more than 90% of the roots are distributed in 0-20cm, while the roots below the bottom of Lili are less than 15%. And the branch roots are mainly branched from the main root at 5-20cm below the surface, and the branch roots branched from the main root below 20cm are few, and most of them are linear fine roots; 77.77%~82.88% are concentrated in the soil 0~5cm away from the plant.

Embodiment 3

[0083] This embodiment is a system for improving the water use efficiency of soybeans that realizes the above method, and the system includes: at least one set of root-cutting knives 1 installed on the tractor frame and a knife holder 2 for installing the root-breaking knives, the root-cutting knife Or a condenser 3 is installed on the tool rest, and the condenser is connected with the condenser power supply 5 installed on the tractor 4, as image 3 , 4 shown.

[0084] This embodiment is a system for realizing the mechanized root-cutting operation of the above-mentioned root-cutting method. The system includes:

[0085] Ritual knife: It can be ultrasonic root knife or electric coagulation root knife.

[0086] A positioning device can be installed on the tool post: use laser rangefinder + carry stepping motor + tilting stepping motor to measure the distance between the central axis and the plant, and adjust the relative position and angle of the tool.

[0087] The console can...

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Abstract

The invention relates to a method and system for improving the utilization efficiency of soybean moisture. The method includes the steps that the drought degree of crops is evaluated; the root cutting period is selected; the root cutting amount is determined; soybean root space distribution of a current growth period is calculated; the root cutting depth is determined; the root cutting position is determined; root cutting is conducted. The development conditions of soybean roots are judged by evaluating weather and field humidity, and the root cutting amount is determined according to early stage growth tendency of soybeans and draught evaluation. The soybean root development conditions are judged by building a root distribution mathematic model, and accordingly the root cutting moment, position, depth and other parameters are determined. The system uses the root cutting condensation method, the situation that nutrient liquid flows out from a cut-off tool after the crop roots are cut off is prevented, bleeding is reduced as much as possible, the crops obtained after root cutting quickly restore the original growth tendency, production reduction or even wither caused by necrosis of root cutting portions is avoided, the water resource utilization rate in the crop growth process is increased, and the soil moisture content and fertility of farmland are improved and maintained.

Description

technical field [0001] The invention relates to a method and a system for improving soybean water use efficiency, and is a water-saving and environment-friendly farmland management measure and system. Background technique [0002] In semi-arid dry farming areas, the lack of water resources has become the main factor limiting the high yield of soybeans. The environmental resource with the strongest competition among individual plants is soil moisture, and the root system is the most important organ for competition for water. Root growth and development are closely related to crop yield. Reasonable regulation of root growth can promote the coordinated development of aboveground and underground parts of crops, which is conducive to increasing crop yield. [0003] In agricultural production practice, it has always been the focus of dryland agricultural research to promote the coordinated development of aboveground and underground populations through reasonable agronomic measures...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G22/40A01G7/06A01G3/08
CPCA01G3/08A01G3/085A01G3/088A01G7/06A01G22/00
Inventor 王英严登华龚家国秦天玲王利娜徐婷
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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