CN106950262A - A kind of method for predicting crop salt stress level - Google Patents
A kind of method for predicting crop salt stress level Download PDFInfo
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Abstract
The invention discloses a kind of method for predicting crop salt stress level, belong to crop information detection technique field.By rating model plant leaf water potential and physiology electric capacity, and computation model plant leaf blade tensity, utilize the exponential damping equation of two parameter to build Model Plants Leaf Physiology electric capacity, blade tensity and the horizontal model of salt stress；What is grown under selection unknown salt stress level to be measured is investigated crop, determine its leaf water potential and physiology electric capacity, the crop leaf tensity for being grown in unknown salt stress level to be measured is calculated also according to leaf water potential and physiology electric capacity, the exponential decay model according to the two parameter built obtains the salt stress level based on Leaf Physiology electric capacity and based on blade tensity respectively.Instant invention overcomes in the prior art can not in time, quick, on-line checking crop by complex salt or unknown concentration and the deficiency of the salt damage level of composition, irrigated for dilution and foundation be provided.
Description
Technical field
The present invention relates to a kind of method for predicting crop salt stress level, belong to crop information detection technique field.
Background technology
The soil salinization is the Tough questions that agricultural production faces.Rational soil and water management and chemical modifying can mitigate pair
The salt damage of crop, but be difficult to promote because cost is big, slowly effect.Saline Irrigation is in the soil salinization and the agricultural of shortage of water resources
Area, is one of important channel for increasing productivity.
Soil salt has two-way function to plant growth.Compared with Low-salinity or in the salinity water being adapted with plant patience
Under the conditions of flat, the influence to plant growth is slight, sometimes also certain promotion, especially true to salt resistance and halophytes.
But too high salinity is serious to most of plant hazard, or even including salt-resistant plant it is also such.
The salinity of soil has complexity, and different time concentration and composition are differed.The source of salt solution is also varied,
Variability is strong, complicated component, and the salt adverse circumstance level representated by the salt solution of separate sources is also different；In addition, same adverse circumstance level because
By crop before it by adverse circumstance level influenceed, show different stress responses；Different Crop is to same adverse circumstance level
Also different stress responses are showed.
Plant growth and adverse circumstance level have certain related, and increment is an accumulation index, it is impossible to increment come
Judge the Salt Strees Condition level that crop is subjected in time.A kind of examined therefore, it is necessary to find using the timely index of plant physiology
Survey the salt adverse circumstance level that crop is subjected to.
The presence of soil salt reduces the osmotic potential of the soil liquid, declines soil water potential, causes crop water suction difficult,
Cause water stress.Due to insufficient water, plant cell turgescence declines, and influences cellular contraction.It is well known that plant leaf blade is by big
Measure cell to constitute, the dilation or degree of shrinkage of its water regime and cell are closely related, the change of cell liquid concentration and cell volume
Changing can be reflected by the change of physiology electric appearance or blade tensity.Can be right by the change for monitoring plant leaf blade cell
Salt stress level residing for it carries out analysis prediction, and then judges its salt resistance ability, and scientific basis is provided for saline Irrigation.
The content of the invention
The invention provides it is a kind of predict crop salt stress level method, with overcome in the prior art can not in time, soon
Speed, on-line checking crop by complex salt or unknown concentration and the deficiency of the salt damage level of composition, solve in the prior art because
There is no quantitative data and be difficult to the technical barrier that determines dilute salt rehydration effect, irrigated for dilution and data supporting is provided.
The present invention takes following technical scheme：
A kind of method for predicting crop salt stress level, comprises the following steps：
Step one, crop seed is sprouted using the hole tray of same specification in laboratory, prepares nutrient solution culture model plant
Seedling, to 3 leaves more than the phase, the more consistent plant of growth selection is used as the Model Plants for being investigated crop；
Step 2, Model Plants is cultivated respectively in the known nutrient solution containing different salt stress levels；
Step 3, treats Model Plants culture to more than two weeks, using the first expansion leaf as object is investigated, is determined in the same period
Model Plants leaf water potential W and physiology electric capacity CP；
Step 4, according to leaf water potential W and physiology electric capacity CP computation model plant leaf blade tensities LT；
Step 5, builds Model Plants Leaf Physiology electric capacity CP, blade tight respectively using the exponential damping equation of two parameter
Tonicity LT and the horizontal model of salt stress；
What is grown under step 6, selection unknown salt stress level to be measured is investigated crop, using the first expansion leaf as investigation
Object, waits that investigated crop grows to more than one week under unknown salt stress level to be measured, the identical period in step 3
Determine its leaf water potential Wa and physiology electric capacity CPa；
Step 7, calculates according to leaf water potential Wa and physiology electric capacity CPa and is grown in being examined for unknown salt stress level to be measured
Examine crop leaf tensity LTa；
Step 8, Model Plants Leaf Physiology electric capacity CP is substituted into in the horizontal model of salt stress, obtaining using CPa as CP values
Salt stress level based on Leaf Physiology electric capacity；
Step 9, Model Plants blade tensity LT is substituted into in the horizontal model of salt stress, obtaining base using LTa as LT values
In the salt stress level of blade tensity.
Further, calculating blade tensity LT formula is in the step 4
Wherein coefficient dissociates in i systems, and R is gas constant, and T is thermodynamic temperature, ε0For permittivity of vacuum, a is the phase of cell liquid solute
To dielectric constant, M is the relative molecular mass of cell liquid solute.
Further, Model Plants Leaf Physiology electric capacity CP is with the horizontal model of salt stress in the step 5Blade tensity LT is with the horizontal model of salt stressWherein a1、a2、b1、b2It is model
Constant, XCFor salt adverse circumstance level.
Further, Model Plants Leaf Physiology electric capacity CP and salt stress water are substituted into using CPa as CP values in the step 8
In flat-die type, i.e., CP=CPa is substituted intoIn, obtain the X of equationC, it is designated as XC-CP, as based on Leaf Physiology
The salt stress level of electric capacity.
Further, Model Plants blade tensity LT and salt stress level are substituted into using LTa as LT values in the step 9
In model, i.e., LT=LTa is updated toIn, obtain the X of equationC, it is designated as XC-LT, it is as nervous based on blade
The salt stress level of degree.
Beneficial effects of the present invention are：
1) this method is by the measure to leaf water potential and physiology electric capacity, using plant electrophysiological index can with it is lossless,
Salt stress level easy, quick, that efficiently prediction crop is subjected to, is not limited by natural environment, with preferable controllability.
2) this method, can be timely based on blade tensity or physiology electric capacity by the two-parameter exponential attenuation model of structure
The salt stress horizontal information that crop is subjected to is provided, crop can not be prevented in advance by the problem of salt damage by overcoming prior art.
3) this method is by the look-ahead to salt stress level suffered by crop, available for for precise control saline Irrigation,
Fresh-water-saving resource provides science data.
4) this method can the analysis based on crop electrophysiological characteristics, in time, quick, on-line checking crop by complex salt or
The salt damage level of unknown concentration and composition, can differentiate the harm of separate sources salt solution.
5) this method analyzing by the salt stress level that is subjected to plant, can evaluate dilute salt rehydration effect, for dilution
Irrigate and data supporting is provided.
Brief description of the drawings
Fig. 1 is the curve matching figure of relation between plant leaf blade physiology electric capacity CP, blade tensity LT and salt adverse circumstance level,
Fig. 1 (a) is the curve matching figure of relation between Rodococcus sp J-5 Leaf Physiology electric capacity CP and salt adverse circumstance level, and Fig. 1 (b) is Rodococcus sp J-5 leaf
The curve matching figure of relation between piece tensity LT and salt adverse circumstance level, Fig. 1 (c) is that green gumbo Leaf Physiology electric capacity CP and salt are inverse
The curve matching figure of relation between the level of border, Fig. 1 (d) is the song of relation between green gumbo blade tensity LT and salt adverse circumstance level
Line fitted figure.
Embodiment
The present invention is further illustrated below, but protection scope of the present invention is not limited to this.
Inventive principle：
When crop is in adverse circumstances, with the increase of stress level, its increment exponentially declines.The stress that crop is subjected to
Level is instantaneous value, and increment is an accumulation index, it is impossible to instantaneous value is characterized with accumulated value, therefore, in practice, we are very
It is difficult to characterize the stress level that crop is subjected to the change of increment.
But, the growth of plant is relevant with water physiological mechanism, and plant leaf blade water regime can use Leaf Physiology
Electric capacity or blade tensity are characterized, and therefore, it can to represent plant with the change of Leaf Physiology electric capacity or tensity instant
Growth rate.It can be characterized between blade tensity or physiology electric capacity and salt stress level with the exponential decay model of two parameter
Relation.
The exponential decay model of two parameter is：
Y=ae-bx(1)
Wherein, e is natural logrithm constant, and a represents initial blade tensity or physiology electric capacity, and b represents rate of decay.
Model Plants Leaf Physiology electric capacity and salt stress level and blade tensity and the horizontal model of salt stress are built, will
Plant physiology electric capacity to be measured or blade tensity substitute into model then can the salt stress level that is subjected to of pre- measuring plants.
Embodiment：
It is research material to take gumbo, and kind is respectively Rodococcus sp J-5 and green gumbo；In laboratory the autumn is sprouted using 12 hole disks
Certain herbaceous plants with big flowers seed, was prepared after Huo Gelan nutrient solution culture model plant seedlings to the 3 leaf phases, and the more consistent plant of growth selection makees respectively
To be investigated the Model Plants of crop；Add the NaCl and CaCl of equivalent2Into Huo Gelan nutrient solutions, different salt stress water are prepared
Flat nutrient solution, as shown in table 1.
The different salt stress levels of table 1
The Model Plants of above-mentioned 3 leaf phase are cultivated simultaneously with the nutrient solution of different salt stress levels respectively, daily more
The corresponding nutrient solution renewed, using the first expansion leaf as object is investigated, in the morning 9 of the 21st day of culture：00-11：When 00
The leaf water potential W and physiology electric capacity CP of rating model crop；Blade according to leaf water potential W and physiology electric capacity CP computation model plants is tight
Tonicity LT.
Wherein：W is the plant tissue flow of water, MPa；Coefficient dissociates in i systems, and its value is 1；R is gas constant, 0.0083L
MPa/mol·K；T is thermodynamic temperature K, and T=273+t DEG C, t is environment temperature；CP is plant leaf blade physiology electric capacity,
F；Permittivity of vacuum ε0=8.854 × 10-12F/m；A is the relative dielectric constant of cell liquid solute, F/m；M is
The relative molecular mass of cell liquid solute；Blade cell liquid solute is assumed to sucrose, and now a is 3.3F/m, and M is 342, calculates knot
Fruit such as table 2.
Two kinds of gumbo Leaf Physiology electric capacity CP, flow of water W and tensity LT under the different salt stress levels of table 2
Then, it is inverse using exponential damping equation (1) structure Leaf Physiology electric capacity CP, the blade tensity LT and salt of two parameter
The horizontal model in border, be respectively：
Wherein a1、a2、b1、b2It is model constants, XCFor salt adverse circumstance level.
By Sigmaplot softwares to the relation between Leaf Physiology electric capacity CP, blade tensity LT and salt adverse circumstance level
Carry out curve fitting, Fig. 1 is shown in matched curve, while can obtain the fitting parameter of the exponential damping equation of two parameter, i.e. Rodococcus sp J-5
For a1=92.01, b1=1.94, a2=152.66, b2=1.78；Green gumbo is a1=98.03, b1=3.28, a2=156.10,
b2=2.85；It is that can obtain corresponding relational model by parameter value substitution exponential damping equation；As shown in table 3.
Table 3 two kinds of gumbo Leaf Physiology electric capacity CP, blade tensity LT and the horizontal model of salt adverse circumstance
From table 3 it can be seen that Leaf Physiology electric capacity CP and salt stress level and blade tensity LT and salt stress level
Model can characterize the relation between electrophysiological index and salt adverse circumstance well, from the square value (R of the coefficient of determination2) from the point of view of,
With Leaf Physiology electric capacity CP compared with salt adverse circumstance relation, blade tensity LT can be preferably with two with salt adverse circumstance relation
The exponential damping equation of parameter is fitted.
The crop for making model is changed into adverse circumstance level culture, the horizontal Replacing Scheme of adverse circumstance such as table 4.
The horizontal Replacing Scheme of the salt stress of table 4
Adverse circumstance level is changed, equally, using the first expansion leaf as object is investigated, continues to cultivate 28 days, in the morning 9：00-11：
Its leaf water potential Wa and physiology electric capacity CPa are determined when 00, then blade tensity LTa is calculated according to leaf water potential Wa and physiology electric capacity CPa,
As a result such as table 5.
Two kinds of gumbo Leaf Physiology electric capacity CPa, flow of water W and blade tensity LTa under the different salt stress levels of table 5
CP=CPa is updated toIn model, it is specially：Rodococcus sp J-5 is substituted into
Green gumbo substitutes intoObtain the X of equationC, it is designated as XC-CP.LT=LTa is updated to
In model, it is specially：Rodococcus sp J-5 is substituted intoGreen gumbo substitutes intoObtain
The X of equationC, it is designated as XC-LT；As a result such as table 6.
The predicted value of 6 two kinds of gumbo salt stress levels of table
As can be seen from Table 6, same salt stress water of the adverse circumstance processing based on Leaf Physiology electric capacity of two kinds of gumbos predicted
The gentle salt stress level based on blade tensity is essentially identical.Either Rodococcus sp J-5 and green gumbo, in the feelings without salt adverse circumstance
Under condition, predicted value is all close to 0, and this explanation present invention has credibility.For green gumbo, salt stress level with
The increase of salinity and increase；In addition to from processing of 1.8% rehydration to 1.2%, salt stress level is all between palaeosalinity and again
Between water target salinity.And for Rodococcus sp J-5, except compare (salt-free adverse circumstance) in addition to, salt stress level it is minimum be salinity
From 1.2% rehydration to 0.6% processing, illustrate Rodococcus sp J-5 after 1.2% salt adverse circumstance, adaptability is greatly enhanced, continue to use
0.6% saline Irrigation, can reach the adverse circumstance effect of 0.39% (0.37%).In addition, the salt stress water based on blade tensity
Error is smaller between flat repetition, and these can similarly illustrate, the present invention has credibility, is coerced based on the salt that blade tensity is obtained
Compel level result precision higher.
Described above is only presently preferred embodiments of the present invention, and the present invention is not limited to enumerate above-described embodiment, should said
Bright, any those of ordinary skill in the art all equivalent substitutes for being made, substantially become under the teaching of this specification
Shape form, all falls within the essential scope of this specification, ought to be by present invention protection.
Claims (5)
1. a kind of method for predicting crop salt stress level, it is characterised in that comprise the following steps：
Step one, crop seed is sprouted using the hole tray of same specification in laboratory, prepares nutrient solution culture model plant seedlings,
To 3 leaves more than the phase, the more consistent plant of growth selection is used as the Model Plants for being investigated crop；
Step 2, Model Plants is cultivated respectively in the known nutrient solution containing different salt stress levels；
Step 3, treats Model Plants culture to more than two weeks, using the first expansion leaf as object is investigated, in same period rating model
Plant leaf water potential W and physiology electric capacity CP；
Step 4, according to leaf water potential W and physiology electric capacity CP computation model plant leaf blade tensities LT；
Step 5, Model Plants Leaf Physiology electric capacity CP, blade tensity are built using the exponential damping equation of two parameter respectively
LT and the horizontal model of salt stress；
What is grown under step 6, selection unknown salt stress level to be measured is investigated crop, using the first expansion leaf as investigation object,
Wait that investigated crop grows to more than one week under unknown salt stress level to be measured, the identical period determines it in step 3
Leaf water potential Wa and physiology electric capacity CPa；
Step 7, calculates according to leaf water potential Wa and physiology electric capacity CPa and is grown in being made by investigation for unknown salt stress level to be measured
Thing blade tensity LTa；
Step 8, Model Plants Leaf Physiology electric capacity CP is substituted into in the horizontal model of salt stress, obtaining and being based on using CPa as CP values
The salt stress level of Leaf Physiology electric capacity；
Step 9, Model Plants blade tensity LT is substituted into in the horizontal model of salt stress, obtaining based on leaf using LTa as LT values
The salt stress level of piece tensity.
2. a kind of method for predicting crop salt stress level according to claim 1, it is characterised in that in the step 4
The formula for calculating blade tensity LT isWherein coefficient dissociates in i systems, and R is that gas is normal
Number, T is thermodynamic temperature, ε0For permittivity of vacuum, a is the relative dielectric constant of cell liquid solute, and M is cell liquid solute
Relative molecular mass.
3. a kind of method for predicting crop salt stress level according to claim 1, it is characterised in that in the step 5
Model Plants Leaf Physiology electric capacity CP is with the horizontal model of salt stressBlade tensity LT and salt stress level
Model isWherein a1、a2、b1、b2It is model constants, XCFor salt adverse circumstance level.
4. a kind of method for predicting crop salt stress level according to claim 3, it is characterised in that in the step 8
Model Plants Leaf Physiology electric capacity CP is substituted into in the horizontal model of salt stress, i.e., substituting into CP=CPa using CPa as CP valuesIn, obtain the X of equationC, it is designated as XC-CP, it is the salt stress level based on Leaf Physiology electric capacity.
5. a kind of method for predicting crop salt stress level according to claim 3, it is characterised in that in the step 9
Model Plants blade tensity LT is substituted into in the horizontal model of salt stress, i.e., being updated to LT=LTa using LTa as LT valuesIn, obtain the X of equationC, it is designated as XC-LT, it is the salt stress level based on blade tensity.
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| CN109425700A (en) * | 2017-08-24 | 2019-03-05 | 中国科学院寒区旱区环境与工程研究所 | A method of test diversiform-leaved poplar seed sprouts ability and matrix salt content relationship |
| CN109425701A (en) * | 2017-08-24 | 2019-03-05 | 中国科学院寒区旱区环境与工程研究所 | A method of test diversiform-leaved poplar seed sprouts ability and water supply in media relation with contents |
| CN111855920A (en) * | 2020-08-05 | 2020-10-30 | 中国农业科学院棉花研究所 | Method for identifying alkali stress degree of cotton |
| CN114009326A (en) * | 2021-11-05 | 2022-02-08 | 河北省农林科学院滨海农业研究所 | Method for rapidly identifying salt tolerance of in-vitro water culture of plant |
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|---|---|---|---|---|
| CN109425700A (en) * | 2017-08-24 | 2019-03-05 | 中国科学院寒区旱区环境与工程研究所 | A method of test diversiform-leaved poplar seed sprouts ability and matrix salt content relationship |
| CN109425701A (en) * | 2017-08-24 | 2019-03-05 | 中国科学院寒区旱区环境与工程研究所 | A method of test diversiform-leaved poplar seed sprouts ability and water supply in media relation with contents |
| CN109425700B (en) * | 2017-08-24 | 2020-08-14 | 中国科学院西北生态环境资源研究院 | Method for testing relation between populus diversifolia seed germination capacity and medium salt content |
| CN109425701B (en) * | 2017-08-24 | 2020-08-21 | 中国科学院西北生态环境资源研究院 | Method for testing relation between populus diversifolia seed germination capacity and substrate moisture content |
| CN107748233A (en) * | 2017-11-21 | 2018-03-02 | 江苏大学 | A kind of method of Quantitative detection plant anti-salt ability |
| CN111855920A (en) * | 2020-08-05 | 2020-10-30 | 中国农业科学院棉花研究所 | Method for identifying alkali stress degree of cotton |
| CN114009326A (en) * | 2021-11-05 | 2022-02-08 | 河北省农林科学院滨海农业研究所 | Method for rapidly identifying salt tolerance of in-vitro water culture of plant |
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