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A method and system for improving corn water use efficiency

A corn and water technology, applied in horticultural methods, botany equipment and methods, applications, etc., can solve problems such as crop growth impact, crop yield reduction, and growth weakness, so as to improve soil moisture and fertility, reduce water damage, and maintain soil Effects of Moisture and Fertility

Active Publication Date: 2020-04-28
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Examples

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Embodiment 1

[0030] This embodiment is a method for improving the water use efficiency of corn. The steps of the method are as follows:

[0031] (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.

[0032] Drought assessment: Calculations of Palmer's method and modified PDSI index can be used.

[0033] (1) Palmer method: Palmer (Palmer, translated as Palmer) believes that the drought period is a period of con...

Embodiment 2

[0078] 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 x 1 =23cm, x 2 =20cm, x 3 =18cm, x 4 =15cm 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.

[0079] The northern summer corn is usually sown in early June, and the seedlings emerge in about a week. The root cutting time of the corn is selected at the seedling stage of the corn, and the root cutting is performed when the corn grows to 5-6 leaves, and part of the secondary roots are removed. figure 2 Mark the lower cut position. The maize root injury measure at the seedling stage significantly increased the overall yield of corn and reduced water consumption. After root injury, the biological yield and water use efficiency of corn were i...

Embodiment 3

[0083] The present embodiment is a system for improving the water use efficiency of corn for realizing the above method, and the system includes: at least one set of root-cutting knives 1 installed on the frame of the tractor and a knife holder 2 for installing the root-breaking knives, and the root-cutting knives 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...

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Abstract

The invention relates to a method and system for increasing corn moisture utilization efficiency. The method includes: evaluating crop drought degree; selecting a root cutting period; determining a root cutting quantity; calculating the spatial distribution of the current-growth-period root system of the corn; determining root cutting depth; determining a root cutting position; performing root cutting. The method has the advantages that the humidity of weather and a field are evaluated, and the root cutting quantity is determined according to the early-stage growth vigor and the drought degree evaluation of the corn; a root system distribution mathematical model is built to judge the root system development conditions of the corn, and parameters such as root cutting timing, the root cutting position and the root cutting depth are determined. The system has the advantages that a root cutting condensation method is used to prevent nutritional liquid of the cut root system from flowing out from a cutting knife, bleeding is reduced as much as possible, the crop after the root cutting can fast restore the original growth vigor, crop yield reduction even withering caused by the necrosis of the root cutting part, the water resource utilization rate during crop growth is increased, and the soil water conditions and fertility of the field are improved and kept.

Description

technical field [0001] The invention relates to a method and a system for improving the water use efficiency of corn, which is a water-saving and environment-friendly farmland management measure, and a method and a system for improving the water use efficiency of crops. Background technique [0002] Maize is the main food crop, but in semi-arid dryland agricultural areas, the lack of water resources has become the main factor limiting the high yield of maize. The environmental resource with the strongest competition among plant individuals 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G22/20A01G7/06
CPCA01G7/06A01G22/00
Inventor 王英严登华龚家国翁白莎秦天玲
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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