CN-122004112-A - Self-adaptive irrigation control method for ecological planting of traditional Chinese medicinal materials

CN122004112ACN 122004112 ACN122004112 ACN 122004112ACN-122004112-A

Abstract

The invention discloses a traditional Chinese medicine ecological planting self-adaptive irrigation control method, which relates to the technical field of irrigation control and comprises the steps of entrance permission and partition modeling, establishing a partition parameter table and binding a target water-containing window according to farmland irrigation water quality standards, a rain peak early-late coefficient and a communication sequence, performing front feed-forward, generating a highest allowable water content according to a partition rainfall and an infiltration upper limit, forming a forbidden irrigation window and a pre-withdrawal time slot, introducing probability constraint and priority scheduling, performing in the rain, triggering stopping and peak-shifting drainage based on curve numbers, judging a ventilation threshold by air filling porosity or oxygen diffusion rate, accumulating anoxic dose integration, recovering after rain, balancing water content of a reverse root layer by water balance, performing pulse supplementing irrigation in the target water-containing window, and correcting a forecast reduction coefficient, curve numbers and the rain peak early-late coefficient limit. The method reduces the risk of rain and runoff after watering, shortens the high-humidity duration of the root zone, and improves the cooperation of irrigation and drainage and stable quality.

Inventors

WANG YUANZHONG
ZHU XINYAN
YANG SHAOBING

Assignees

云南省农业科学院药用植物研究所

Dates

Publication Date: 20260512
Application Date: 20260309

Claims (10)

1. A self-adaptive irrigation control method for ecological planting of Chinese medicinal materials is characterized by comprising the following steps of, The method comprises the steps of carrying out permission and partition modeling, judging whether a water source is permitted, is permitted or blocked or is replaced after dilution according to a farmland irrigation water quality standard, identifying early, middle or late rainfall peaks to obtain early and late rainfall peak coefficients, determining upstream and downstream communication based on a digital elevation, establishing a partition parameter table and binding a target water containing window; The method comprises the steps of feeding forward rain, determining the highest allowable water content under the constraint of an infiltration upper limit according to split rainfall, forecast reduction coefficient and a rain peak early-late coefficient, and pre-withdrawing according to the conversion of the current water content and root thickness; Determining that the flow is stopped according to the curve number and the communication sequence, and draining waterlogging according to upstream-to-downstream peak staggering, taking air filling porosity or oxygen diffusion rate as a ventilation threshold, limiting current and improving drainage priority when the air filling porosity or oxygen diffusion rate is determined to be insufficient, and accumulating anoxic dose integration; Restoring after rain, reversely pushing the water content of the root layer after rain according to conservation, determining the target water content in a target water content window, generating the turn, single time duration and interval of pulse recharging according to anoxic dose integration, and carrying out amplitude limiting correction on the forecast reduction coefficient, the curve number and the early and late coefficient of a rain peak according to event deviation.
2. The method for controlling ecological planting self-adaptive irrigation of traditional Chinese medicinal materials according to claim 1, which is characterized by comprising the following steps of: when the partition parameter table is established, the curve number, the infiltration upper limit, the field water holding capacity, the root layer thickness and the current water content are set as necessary filling fields, the partition number, the upstream-downstream relation and the water quality permission state are used for archiving, and the target water content window, the early-late coefficient of the rain peak and the communication sequence are written into the same parameter table.
3. The method for controlling ecological planting self-adaptive irrigation of traditional Chinese medicinal materials according to claim 2, which is characterized in that: The water quality permission further comprises the steps of allowing the water to be diluted according to the mixing proportion of the two water sources when the online conductivity is slightly higher than the limit value, recording the mixing source and proportion in a partition parameter table, and marking the partition as blocking or source changing when the detection value exceeds the limit value and only allowing the water to be pre-removed and drained when the detection value exceeds the limit value.
4. The method for controlling ecological planting self-adaptive irrigation of traditional Chinese medicinal materials according to claim 3, wherein the method comprises the following steps of: and constructing a plurality of rainfall scenes based on the set forecast or the bitwise slicing, calculating the corresponding future water content and the corresponding radial flow depth from scene to scene, judging by using a management threshold value of the water holding capacity probability and the flow yield probability in the super field, and increasing the pre-withdrawal priority and expanding the duration time of the forbidden irrigation window when the threshold value is not met.
5. The method for controlling ecological planting self-adaptive irrigation of traditional Chinese medicinal materials according to claim 4, wherein the method comprises the following steps of: Generating a pre-removing queue according to the communication sequence, preferentially arranging an upstream partition, forming a pre-removing time slot under the constraint of pump station power and gate capacity, controlling the start and stop of a pump and the opening and closing of a gate according to the time slot, and executing mixing and then entering the pre-removing queue when the water quality is allowed to be diluted.
6. The method for controlling ecological planting self-adaptive irrigation of traditional Chinese medicinal materials according to claim 5, wherein the method comprises the following steps of: when the surface runoffs are generated according to the curve number, immediately executing the stopping of the irrigation of the corresponding subareas, adding the subareas into the drainage queue, performing peak shifting operation on the drainage queue according to the communication sequence, starting the upstream pump station and the upstream gate, and then switching the downstream pump station and the downstream gate until the queue rotates completely.
7. The method for controlling ecological planting self-adaptive irrigation of traditional Chinese medicinal materials according to claim 6, wherein the method comprises the following steps of: and when any index does not meet the ventilation requirement, keeping the partition to stop filling or limiting the flow according to the minimum flow, and improving the priority of the partition in a drainage queue, wherein the measured value of ventilation judgment is written into the corresponding moment of the partition parameter table.
8. The method for controlling ecological planting self-adaptive irrigation of traditional Chinese medicinal materials according to claim 7, wherein the method comprises the following steps of: And when each drainage wheel is finished, recording the ventilation judging result of the subarea, accumulating the anoxic dose integral, storing the anoxic dose integral and the time stamp into a subarea parameter table, and inputting the target water content and the generated pulse supplementing and filling wheel times, single time duration and intervals as a fourth step.
9. The method for controlling ecological planting self-adaptive irrigation of traditional Chinese medicinal materials according to claim 8, wherein the method comprises the following steps of: and at the moment of starting after rain, carrying out water conservation and reverse pushing according to the rainfall, the upper limit of infiltration, the surface runoff, the deep seepage and the recorded value of the evapotranspiration during the event to obtain the water content of the root layer after rain, and carrying out reverse pushing and recording only when the water quality is permitted to be blocked or the source is replaced, so that pulse recharging is not generated.
10. The method for controlling ecological planting self-adaptive irrigation of traditional Chinese medicinal materials according to claim 9, wherein the method comprises the following steps of: Selecting target water content in a target water content window, dividing the supplementing and filling quantity into multiple rounds of pulses according to anoxic dose integration, giving out single time duration and interval of each round, arranging the pulses into execution according to pump station capacity and electricity price time period, and carrying out amplitude limiting correction on forecast reduction coefficients, curve numbers and early and late coefficients of a rain peak after an event is ended.

Description

Self-adaptive irrigation control method for ecological planting of traditional Chinese medicinal materials Technical Field The invention relates to the technical field of irrigation control, in particular to a self-adaptive irrigation control method for ecological planting of traditional Chinese medicinal materials. Background The ecological planting of traditional Chinese medicinal materials is mostly located in micro-topography environments such as forests, sloping fields, terrains and the like, land mass fragmentation and the difference between soil layer thickness and water holding capacity are obvious, and irrigation and drainage facilities are difficult to be arranged in a standardized mode due to the limitation of terrains. In recent years, the drought, the heavy rainfall and the high-temperature evaporation are frequently alternated in the same growth period by strong convection weather, so that the management pressure is increased. In the production, drip irrigation, micro-spraying and rain shelters are mostly adopted, the decision is usually made according to soil water content threshold, evapotranspiration or experience, and open ditches, submerged ditches or water level regulation and control are usually adopted at the drainage side. The method is effective in a steady state annual scene, but when the rain is suddenly dropped, irrigation and drainage are often carried out in a track-separated mode, and coordination is difficult. Typical problems include that before rain water replenishment is not regulated downwards to lead the water content of a root layer to approach or exceed the water holding capacity of a field, slope confluence enables upstream water supply to be overlapped at the downstream, the water quality of a water source fluctuates under unconventional conditions but is not checked by a front stage, sensing and manual response are delayed, and timely landing is difficult. In mechanism, the initial water content before rain is higher, the infiltration capacity is reduced, the surface layer is easy to saturate and trigger the surface runoff, and under the condition of communicating slope surfaces, strong rain forms rapid confluence and local ponding. After rain and rain, ventilation in the root zone is determined by the proportion of air in the pores, when the air filling porosity is reduced to less than one tenth, oxygen diffusion is blocked, root metabolism is limited, the risks of diseases such as root rot and the like are increased, and if water sources with conductivity, sodium adsorption ratio or heavy metal overrun are used for irrigation, salt accumulation and quality fluctuation can be induced. Meanwhile, the quality and disease control of the medicinal materials have a specific window on water content, the long-term high humidity is not favorable for stabilizing active ingredients and increasing disease hidden danger, and the prior art is mostly guided by single target water or yield, so that the quality and risk are difficult to be considered. Therefore, under the complex scene of drought and waterlogging, the current irrigation scheduling mainly based on the evapotranspiration method, the controlled drainage mainly based on the water level and the soil water content control based on a single threshold value are not provided with unified criteria and continuous cooperative logic before and after specific blocks, multiple constraints of mutual restriction before, during and after rain are difficult to process in time, and excessive field water holding capacity, runoff overflow, long anaerobic duration in root areas and quality and disease risk rise are easily caused. The invention aims to solve the technical problems that under complex topography conditions such as under forests, sloping fields and the like of ecological planting of traditional Chinese medicinal materials, rapid switching of drought and heavy rainfall in the same growth period is faced, how to age at an hour level in a continuous period before, during and after rain, and based on rainfall process, infiltration and confluence characteristics, ventilation state of a root zone, water quality of a water source and medicinal material quality-disease requirements, mutually consistent and quantifiable judgment conditions and execution triggering boundaries are established, so that water holding capacity and surface water yield of a super field are avoided, anoxic duration of the root zone is controlled, and the water containing interval requirements required by quality and disease control after rain are met. Disclosure of Invention (One) solving the technical problems Aiming at the defects of the prior art, the invention provides a self-adaptive irrigation control method for ecological planting of traditional Chinese medicinal materials, which comprises the steps of generating the highest allowable water content according to the upper limit of split rainfall and infiltration, forming a forbidden irrigation window a