CN-121998197-A - Balanced water and fertilizer management method for yield and quality of tomatoes in greenhouse

CN121998197ACN 121998197 ACN121998197 ACN 121998197ACN-121998197-A

Abstract

The patent of the invention discloses a water and fertilizer management method for balancing the yield and quality of tomatoes in a greenhouse, which is characterized in that a CRITIC-VIKOR comprehensive evaluation model is adopted to obtain a group benefit value, an individual regrind value and a compromise evaluation value of each test water and fertilizer scheme, and then a wormcast irrigation management strategy meeting the compromise requirement is obtained through comparison of the group benefit value, the individual regrind value and the compromise evaluation value. Compared with the prior art, the method has the advantages that the CRITIC-VIKOR comprehensive evaluation model has remarkable advantages in greenhouse drip irrigation tomato water and fertilizer management optimization, has the core advantages of fusing a compromise idea, comprehensively analyzing and evaluating all indexes in two aspects of subjectivity, wherein the CRITIC method mainly carries out objective weighting, comprehensively considers the contrast strength and conflict among indexes, comprehensively considers the maximization of group utility and the minimization of individual regrets, and can integrate the compromise idea according to the preference of a decision maker, and has higher sequencing stability and reliability.

Inventors

YAO MINGZE
LI JINGYAN
XU WEI
ZHAO MINGYU
DAI YONGJIANG
WANG ZHIYONG
FU LIN
ZHANG FENG

Assignees

沈阳农业大学

Dates

Publication Date: 20260508
Application Date: 20260205

Claims (5)

1. A method for managing the balanced water and fertilizer of the yield and quality of tomatoes in a greenhouse is characterized in that a CRITIC-VIKOR comprehensive evaluation model is adopted to obtain a group benefit value, an individual regrind value and a compromise evaluation value of each test water and fertilizer scheme, and then a wormcast irrigation management strategy meeting the compromise requirement is obtained through comparison of the group benefit value, the individual regrind value and the compromise evaluation value, and the steps are specifically processed as follows: 1) Data collection, determining a plurality of test plots according to different conditions among different treatments under the same greenhouse condition, and determining and recording specific indexes for subsequent comprehensive evaluation in the key growth period and the harvesting period of tomatoes; 2) Data processing, namely calculating each specific index measured in the step 1) by adopting a CRITIC method to obtain corresponding weights, then continuously calculating the weights obtained by combining a VIKOR model with a CRITIC method to obtain a group benefit value, an individual regrind value and a compromise evaluation value of each test treatment, and obtaining each treatment sequencing result by sequencing the three values; 3) And determining an optimal mode, and determining an optimal wormcast irrigation management strategy conforming to the region from the sequencing result.
2. A method for balanced water and fertilizer management of greenhouse tomato yield and quality according to claim 1, wherein the number of test plots is not less than 27.
3. The method for managing the balanced water and fertilizer for the yield and the quality of tomatoes in a greenhouse according to claim 1, wherein the specific indexes comprise, but are not limited to, plant height, stem thickness, leaf area index (L), dry matter quality of each organ, single fruit number, single fruit weight, total yield (Y), vitamin C content (VC), soluble solids content (TSS), soluble sugar content (SS), organic acid content (OA) and Water Productivity (WP).
4. A method for balanced water and fertilizer management of greenhouse tomato yield and quality according to claim 1, wherein each organ refers to any one of Fruit Dry Matter (FDM), stem matter (SDM), root Dry Matter (RDM), leaf Dry Matter (LDM).
5. The method for managing the balanced water and fertilizer of the yield and the quality of the tomatoes in the greenhouse according to claim 1, wherein the specific calculation process of the data processing in the step 2) is as follows: 11 Constructing a decision matrix assuming presence Individual treatments There is Individual evaluation index Decision matrix Represent the first The process is at the first An evaluation value under each index, wherein , ; 12 Data normalization including positive and negative indexes, calculating the contrast strength of the indexes, measured by standard deviation, the first Standard deviation of individual index The following formula was used for calculation: Wherein: Is the first The average value of the indexes is that the positive index is larger and better, and the negative index is that the value is smaller and better; The calculation formula of the forward index is as follows: the calculation formula of the negative index is as follows: 13 Calculating the conflict between the indexes, wherein the conflict between the indexes is measured by the Pearson correlation coefficient between the indexes, and the first Conflict of individual metrics with all other metrics The calculation formula of (2) is as follows: in the formula, Is the first Individual index and the first The pearson correlation coefficient between the individual indices is calculated using the following formula: 14 Information amount of calculation index 15 Determining index weight, the first Weights of individual indicators The calculation formula of (2) is as follows: and satisfy the following ; 16 Calculating group benefit values of each treatment to positive ideal solutions by using VIKOR model And individual regret values Group benefit value And individual regret values The calculation formulas of (a) are respectively as follows: in the formula, Representative index As will be appreciated from the following, in a positive sense, Representative index The negative ideal solution of the lower one, Representative treatment Lower first The number of the indexes is equal to the number of the indexes, Is an index The weight of (2) is calculated in the step 15); Reflect the first The overall deviation degree of individual processing and positive ideal solutions under all indexes shows the maximization of population benefit, and Reflect the first The maximum deviation degree of individual treatment from the ideal solution under a certain index reflects the minimization of individual regrets; 17 Calculating a compromise evaluation value Compromise of evaluation value For measuring the integrated performance of each process, a coefficient is set Weights for controlling whether decision results favor group utility or individual regrets, The larger the result, the more biased to population utility, and conversely to individual regrets, the calculation formula is as follows: in the formula, , , , , Is the decision matrix coefficient, generally It reflects the decision maker's preference level for group benefit and individual regrets, when The group benefit is more emphasized when When the patient is more attentive to the individual's deficiency, the patient should be more attentive to the following conditions When the two are considered as the same importance is attached to the two; 18 Processing ordering and selection, to 、 And Sequencing from small to large respectively to obtain corresponding sequencing results; if the following two conditions are satisfied, the trade-off (optimal processing) is Processing with minimum value: condition 1 (acceptable advantage): Wherein Is that The process of the value being the next smaller, , Total number for all treatments; Condition 2 (acceptable stability): Also is Ordering or sorting Optimizing in the sequencing; If one of the two conditions is not met, a set of tradeoffs is given: If condition 1 is not satisfied only, the trade-off process is And ; If condition 2 is not satisfied only, the trade-off is Wherein Is satisfied with Is the maximum sequence number of (c).

Description

Balanced water and fertilizer management method for yield and quality of tomatoes in greenhouse Technical Field The invention belongs to the technical field of greenhouse crop production management, and particularly relates to a water and fertilizer management method for balancing yield and quality of tomatoes in a greenhouse. Background Tomato is a horticultural crop with high nutritional value and economic benefit and is now widely planted around the world. However, greenhouse planting is usually carried out by adopting single crops for many years, so that serious continuous cropping obstacles appear, soil structures are destroyed, fertility is reduced, the yield of the planted crops is reduced, quality is deteriorated, and water resource waste is caused. A large number of scholars research shows that drought stress can lead to crop yield reduction, excessive watering can lead to serious soil ponding, plant root system respiration is blocked, and yield and quality are reduced. The fertilizer is applied less and can not meet the nutrition required by the growth of crops, so that the plant is short and the yield is reduced, but excessive application can cause nitrate pollution, soil saline-alkali is aggravated, and the seedling burning phenomenon is generated so that the yield is reduced. However, in northeast China, due to higher latitude, fresh vegetables are mostly provided by means of greenhouses, but farmers often adopt unreasonable fertilization and irrigation strategies for pursuing high yield, so that the soil structure is damaged, the crop yield is reduced, and the quality is reduced. Solving these problems requires that we use a more scientific water and fertilizer management scheme. Therefore, there is a need to explore the optimal wormcast and water combination through gradient tests to achieve the production goals of high yield, high quality and efficient water resource utilization. At present, a water and fertilizer management optimization model in agriculture is gradually transited from a single model to a multi-objective comprehensive evaluation model, and a plurality of scholars in the past adopt methods such as gray correlation degree, principal component analysis, analytic hierarchy process, TOPSIS and the like, and most of the methods are combined for use at present, but the selection of the optimal water and fertilizer scheme basically depends on the TOPSIS. However, TOPSIS cannot consider the compromises between schemes, only partial information of data can be utilized, complex relations and internal structures between the data are not mined enough, and a result with larger deviation from actual production can occur due to different subjective and objective weighting methods. In order to solve the problem, more data are collected by people, more advanced models are adopted to further optimize the water and fertilizer management of the greenhouse, and more scientific, reasonable, accurate and stable evaluation results are obtained. For these reasons, we explore whether new models can be improved in terms of water and fertilizer management optimization. Finally, a VIKOR multi-attribute decision model is found, which can comprehensively consider the maximization of group utility and the minimization of individual regrets, and can integrate a compromise thought according to the preference of a decision maker, thereby being more in line with the situation that the comprehensive benefit needs to be balanced in actual decision making and having higher sequencing stability and reliability. In addition, the influence of subjective preference of the model is considered, CRITIC method is introduced to give objective weighting, and the contrast intensity and conflict among indexes are comprehensively considered, so that the obtained weight is more scientific and reasonable. The method aims to overcome the defects of a single evaluation model, integrates a compromise idea, further improves the objectivity and accuracy of decision making through a comprehensive evaluation model, provides theoretical support for agricultural greenhouse crop water and fertilizer management and green efficient sustainable production, and provides technical support for precise fertigation strategy formulation in greenhouse tomato planting. Disclosure of Invention The invention aims to provide a water and fertilizer management method for balancing the yield and quality of tomatoes in a greenhouse, overcomes the defects of the prior art, explores the influence of applying wormcast to indexes such as yield, quality and water productivity of tomatoes in the greenhouse in northeast China by matching irrigation, adopts CRITIC-VIKOR comprehensive evaluation by collecting test data, synthesizes water-saving high-yield high-quality targets and optimizes a wormcast water management strategy of the tomatoes in the greenhouse in the northeast China, and searches for the optimal wormcast water management strategy suitable for the to