CN-122004096-A - Planting method for flax in saline-alkali soil

CN122004096ACN 122004096 ACN122004096 ACN 122004096ACN-122004096-A

Abstract

The invention relates to the technical field of flax planting, in particular to a flax planting method in saline-alkali soil, which comprises the steps of calculating a seedling stage characteristic index by fusing canopy remote sensing information and plant growth information, comparing the seedling stage characteristic index with a preset threshold value, judging that the growth state is overall healthy or abnormal, respectively calculating salt and alkali stress indexes based on soil conductivity and sodium adsorption ratio if the growth state is abnormal, identifying corresponding exceeding types by comparing the salt and alkali stress indexes with corresponding threshold values so as to generate a regulation instruction for increasing leaching amount and improving dosage, calculating initial regulation amplitude, and further determining whether to carry out enhancement correction on the initial regulation amplitude so as to generate final regulation amount based on flax ion parameter information of measured flax tissues. The invention realizes the accurate identification of the root cause of stress and the dynamic optimization of the regulation and control quantity, and improves the resource utilization efficiency and management adaptability of the flax planting in the saline-alkali soil.

Inventors

LI AIRONG
GUO NA
WANG WEIJUN
GUO YINGJIE
MA JIANFU
LI YANG
ZHANG BAOYING
ZHANG LILI
JIANG DONGSHUAI

Assignees

张家口市农业科学院(河北省高寒作物研究所)

Dates

Publication Date: 20260512
Application Date: 20260128

Claims (10)

1. A method for planting flax in saline-alkali soil, which is characterized by comprising the following steps: obtaining seedling stage characteristic indexes by calculating seedling stage growth information of a plurality of flax in a planting area in a seedling stage, wherein the seedling stage growth information comprises relative growth rate, red light wave band information and near infrared wave band information; determining the growth state of flax in the current planting area according to the comparison result of the seedling characteristic index and a preset seedling growth threshold, wherein the growth state comprises an overall health state and an overall abnormal state; If the whole health state is judged, determining initial planting parameters of flax in a non-regulated planting area in a fir period, wherein the initial planting parameters comprise salt pressing leaching application amount and modifier application amount; If the overall abnormal state is judged, judging whether the saline and alkaline exceeds the standard or not based on the soil parameter information in the planting area, and determining a corresponding saline and alkaline exceeding type when the saline and alkaline exceeding type is judged to be exceeded, wherein the saline and alkaline exceeding type comprises a salt exceeding type, a alkaline exceeding type and a composite exceeding type, and the soil parameter information comprises soil conductivity and soil sodium adsorption ratio; generating a corresponding adjusting instruction based on the determined saline-alkali exceeding type, and determining an initial adjusting amplitude of the corresponding initial planting parameter based on the adjusting instruction; Calculating an alkali stress ion index and a salt stress ion index based on flax ion parameter information in a planting area, and determining whether to correct the initial adjustment amplitude based on comparison results of the alkali stress ion index and the salt stress ion index with corresponding preset stress ion thresholds respectively, wherein the flax ion parameter information comprises flax chloride ion content, flax sodium ion content and flax potassium ion content, and the preset stress ion thresholds comprise a salt stress ion threshold and an alkali stress ion threshold; And when the correction is judged, determining an initial adjustment amplitude for increasing the application amount of the modifier based on the alkali stress ion index, and determining an initial adjustment amplitude for increasing the application amount of the salt pressing leaching based on the salt stress ion index.
2. The method for planting flax in saline-alkali soil according to claim 1, wherein the determining the growth state of flax in the current planting area according to the comparison result of the characteristic index of seedling stage and the preset growth threshold value of seedling stage comprises: if the characteristic index of the seedling stage is larger than the preset growth threshold of the seedling stage, determining that the current flax growth state is the whole health state; and if the characteristic index of the seedling stage is smaller than or equal to the preset seedling stage growth threshold value, determining that the current flax growth state is the overall abnormal state.
3. The method for planting flax in saline-alkali soil according to claim 2, wherein the process of judging whether the saline-alkali is out of standard based on the soil parameter information in the planting area comprises: Calculating soil salt and alkali index data based on the soil parameter information, wherein the soil salt and alkali index data comprises a soil salt stress index and a soil alkali stress index; Judging whether the saline and alkaline exists exceeding standard or not based on the comparison result of the saline and alkaline index data of the soil and the corresponding preset saline and alkaline index threshold values of the soil, wherein the preset saline and alkaline index threshold values of the soil comprise a soil salt stress threshold value and a soil alkali stress threshold value; if the soil salt stress index is larger than the soil salt stress threshold value or the soil alkali stress index is larger than the soil alkali stress threshold value, judging that the existence of saline and alkali exceeds the standard; And if the soil salt stress index is smaller than or equal to the soil salt stress threshold value and the soil alkali stress index is smaller than or equal to the soil salt stress threshold value, judging that the salt and alkali do not exceed the standard.
4. A method for planting flax in saline-alkali soil according to claim 3, wherein said determining the corresponding type of excess saline-alkali soil when said excess saline-alkali soil is determined comprises: if the soil salt stress index is larger than the soil salt stress threshold and the soil alkali stress index is smaller than or equal to the soil alkali stress threshold, judging that the saline-alkali exceeding type is a salt exceeding type; If the soil alkali stress index is larger than the soil alkali stress threshold and the soil salt stress index is smaller than or equal to the soil salt stress threshold, judging that the saline-alkali exceeding type is an alkali exceeding type; And if the soil salt stress index is larger than the soil salt stress threshold and the soil alkali stress index is larger than the soil alkali stress threshold, judging that the saline-alkali exceeding type is a compound exceeding type.
5. The method of claim 4, wherein the generating corresponding adjustment instructions based on the determined type of excess saline-alkali soil comprises: if the salt and alkali exceeding type is judged to be the salt exceeding type, determining to increase the salt pressing leaching application amount; if the saline-alkali exceeding type is judged to be the alkali exceeding type, determining to increase the application amount of the modifier; if the saline-alkali exceeding type is judged to be the compound exceeding type, the salt pressing leaching application amount and the modifier application amount are increased at the same time.
6. The method of claim 5, wherein determining the initial adjustment range of the corresponding initial planting parameter based on the adjustment instruction comprises: if the salt pressing leaching application amount is increased, determining and calculating the difference value between the soil salt stress index and the soil salt stress threshold value, marking the difference value as a soil salt index difference value, and determining the initial adjustment amplitude of the salt pressing leaching application amount based on the soil salt index difference value; if the application amount of the modifier is increased, determining and calculating the difference value between the soil alkali stress index and the soil alkali stress threshold value and marking the difference value as a soil alkali index difference value, and determining the initial adjustment amplitude of the application amount of the modifier based on the soil alkali index difference value; If the salt pressing leaching application amount and the modifier application amount are increased at the same time, determining an initial adjustment amplitude of the salt pressing leaching application amount based on the soil salt index difference value, and determining the initial adjustment amplitude of the modifier application amount based on the soil alkali index difference value.
7. A method of planting flax in saline-alkali soil according to claim 3 wherein if it is determined that there is no excess saline-alkali, maintaining said initial planting parameters and adding a plant nutrient conditioner is determined.
8. The method according to claim 1, wherein the determining whether to correct the initial adjustment range based on the comparison results of the alkali stress ion index and the salt stress ion index with the corresponding preset stress ion threshold value respectively comprises: If the salt stress ion index is larger than the salt stress ion threshold or the alkali stress ion index is larger than the alkali stress ion threshold, judging to correct the initial adjustment amplitude; and if the alkali stress ion index is smaller than or equal to the alkali stress ion threshold value and the salt stress ion index is smaller than or equal to the salt stress ion threshold value, judging that the initial adjustment amplitude is not corrected.
9. The method of claim 8, wherein said determining to correct said initial adjustment range comprises: If the alkali stress ion index is larger than the alkali stress ion threshold and the salt stress ion index is smaller than or equal to the salt stress ion threshold, determining and calculating the difference between the alkali stress ion index and the alkali stress ion threshold and marking the difference as an alkali stress ion difference, and determining the initial adjustment amplitude for increasing the application amount of the modifier based on the alkali stress ion difference; If the salt stress ion index is larger than the salt stress ion threshold and the alkali stress ion index is smaller than or equal to the alkali stress ion threshold, determining and calculating a difference value between the salt stress ion index and the salt stress ion threshold and marking the difference value as a salt stress ion difference value, and determining to increase the initial adjustment amplitude of the salt pressing leaching application amount based on the salt stress ion difference value; If the salt stress ion index is greater than the salt stress ion threshold and the alkali stress ion index is greater than the alkali stress ion threshold, determining an initial adjustment amplitude of increasing the modifier application amount based on the alkali stress ion difference value and an initial adjustment amplitude of increasing the salt stress ion difference value by the salt pressing leaching application amount.
10. The method for planting flax in saline-alkali soil according to claim 1, wherein the process of calculating the characteristic index of seedling stage comprises: And carrying out fusion calculation on the red light wave band information and the near infrared wave band information to obtain a normalized vegetation index, and carrying out weighted calculation on the basis of the normalized vegetation index and the relative growth rate to obtain the seedling stage characteristic index.

Description

Planting method for flax in saline-alkali soil Technical Field The invention relates to the technical field of flax planting, in particular to a flax planting method in saline-alkali soil. Background The saline-alkali soil is used as an important backup cultivated land resource in China, and the efficient utilization of the saline-alkali soil is important to guaranteeing agricultural production and ecological safety. Flax is used as an economic crop with certain saline-alkali tolerance, and is one of pioneer crops for improving and utilizing saline-alkali soil. However, the saline-alkali soil environment has high space-time heterogeneity, and two stress type factors of salinity and alkalization are often interwoven and coexist, so that compound stress is formed on flax seedling stage planting and middle-late growth, and the yield and quality in the traditional rough management mode are extremely unstable. Chinese patent publication No. CN121303605A discloses an agricultural planting soil parameter analysis system. According to the related technical scheme, multisource data such as soil physics, chemistry and biology are collected through gridding layout sensors, a soil parameter spatial distribution map is generated through statistical analysis, agricultural operations such as variable fertilization are guided, and differentiated investment can be carried out according to spatial differences of soil background conditions. However, the scheme still has the following problems that the prior art scheme mainly relies on soil parameters to carry out partition and decision, lacks direct perception and response to the real-time state of crop growth, and can not accurately judge whether soil adverse factors have caused actual injury and severity of crops or not by simply relying on soil data. Meanwhile, the prior art scheme lacks a dynamic optimization mechanism based on crop physiological feedback, and cannot be dynamically adjusted according to the actual growth state of crops in the critical period of crop growth, so that insufficient regulation or excessive regulation is caused. Therefore, a need exists for a method for realizing multidimensional collaborative diagnosis planting by comprehensively utilizing remote sensing crop growth information, soil multi-parameter information and crop tissue ion content information, so as to dynamically correct the regulation and control amount based on soil calculation according to the actual damage degree of crops, thereby improving the accuracy and adaptability of the saline-alkali soil flax planting management. Disclosure of Invention Therefore, the invention provides a planting method of flax in saline-alkali soil, which is used for solving the problems of poor planting management pertinence and low resource utilization efficiency caused by single diagnosis dimension and lack of a dynamic feedback mechanism based on crop real-time physiological response in the prior art. In order to achieve the above purpose, the invention provides a planting method of flax in saline-alkali soil, comprising the following steps: obtaining seedling stage characteristic indexes by calculating seedling stage growth information of a plurality of flax in a planting area in a seedling stage, wherein the seedling stage growth information comprises relative growth rate, red light wave band information and near infrared wave band information; determining the growth state of flax in the current planting area according to the comparison result of the seedling characteristic index and a preset seedling growth threshold, wherein the growth state comprises an overall health state and an overall abnormal state; If the whole health state is judged, determining initial planting parameters of flax in a non-regulated planting area in a fir period, wherein the initial planting parameters comprise salt pressing leaching application amount and modifier application amount; If the overall abnormal state is judged, judging whether the saline and alkaline exceeds the standard or not based on the soil parameter information in the planting area, and determining a corresponding saline and alkaline exceeding type when the saline and alkaline exceeding type is judged to be exceeded, wherein the saline and alkaline exceeding type comprises a salt exceeding type, a alkaline exceeding type and a composite exceeding type, and the soil parameter information comprises soil conductivity and soil sodium adsorption ratio; generating a corresponding adjusting instruction based on the determined saline-alkali exceeding type, and determining an initial adjusting amplitude of the corresponding initial planting parameter based on the adjusting instruction; Calculating an alkali stress ion index and a salt stress ion index based on flax ion parameter information in a planting area, and determining whether to correct the initial adjustment amplitude based on comparison results of the alkali stress ion index and the salt stress ion in