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A nondestructive greenhouse crop water condition monitoring method for precise irrigation control

A water and crop technology, applied in botany equipment and methods, greenhouse cultivation, testing plants/trees, etc., can solve the problems of not considering the difference of stem changes and the lack of reliability of diagnosis results, etc., to achieve continuous automatic collection and elimination of strains Effects of Inter-Variability, Effects of Continuous Monitoring

Inactive Publication Date: 2019-03-05
孟兆江
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Problems solved by technology

According to Gallardo M et al., the ratio of maximum daily shrinkage of stem diameter (MDS) to saturated water vapor pressure difference (VPD) remains relatively stable during non-water stress periods, while the ratio (MDS / VPD) increases during stress periods. It seems more reasonable to use the ratio to reflect the influence of water on the standardization of the influence of stem changes, but its shortcoming is that it does not consider the differences in stem changes in different growth stages of crops, making the diagnostic results unreliable

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  • A nondestructive greenhouse crop water condition monitoring method for precise irrigation control

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specific Embodiment approach

[0009] The specific embodiment The embodiment of the present invention is as follows:

[0010] 1. Moisture monitoring indicators

[0011] Different water monitoring indicators were used in different growth stages of crops (Table 1). In the "rapid growth stage of stem diameter" of greenhouse crops, the 6:00 stem variation (SD6) was used as the diagnostic index of water status; in the "slow growth stage of stem diameter" of greenhouse crops, the maximum shrinkage of stem diameter (MDS) was used as the diagnosis of water status index.

[0012] Table 1 Quantitative indicators of crop water status monitored by changes in stem diameter of greenhouse crops

[0013]

[0014] 2. Appropriate time for moisture monitoring

[0015] In the rapid growth stage of crops, use the stem difference (SD6) to diagnose the water status of crops at 6:00; in the slow growth stage of crops, choose fine weather, and use the maximum daily shrinkage of stem diameter (MDS) at 11:00-15:00 ) to diagnos...

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Abstract

The invention relates to a crop water condition monitoring method for a precise irrigation system, and particularly relates to a method for nondestructive real-time continuous monitoring of greenhousecrop plant water condition. The method achieves an objective that the method is simple, feasible, non-destructive to plants, and capable of continuous monitoring and automatically recording and accurately obtaining information of water in crops. To study influences of continuously changing environment factors on crop water condition and growth, it is essential to provide a matching technique of real-time crop water monitoring and diagnosis for an automatic control system for precise irrigation. The system mainly includes a stem diameter change sensor, a quadded cable, a data collector, a laptop, and the like. The core technique includes crop water monitoring indexes and quantitative thresholds thereof, suitable crop water monitoring time, a sensor deployment method (the number of sensorsand installation nodes), a monitoring data standardization processing technology, an analysis software system, and the like.

Description

technical field [0001] The invention relates to a method for monitoring the moisture status of crops in a precision irrigation system, in particular to a method for continuously monitoring the moisture status of plants in real time without damage to greenhouse crops. Background technique [0002] Due to the shortage of water resources, in order to realize the sustainable development of irrigated agriculture, it is urgently required that irrigation should be more and more refined and accurate. The basis of this fine and accurate lies in the accurate and timely forecast and Automatic control of water volume and precise application. The basis for realizing precise irrigation is to grasp the water demand characteristics of the crops to be irrigated, when to need water, how much water and other parameters. Therefore, the real-time monitoring and diagnosis technology of crop water status is the basis and guarantee of precise irrigation. [0003] At present, the domestic diagnosi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00A01G9/24A01G25/16
CPCA01G9/247A01G25/167G01N33/0098Y02A40/25
Inventor 孟兆江段爱旺王晓森
Owner 孟兆江
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