A method for evaluating suitability of ploughing and cultivation based on comprehensive ground force of saline soil

Abstract

The application discloses a kind of based on salinized soil comprehensive land capability ploughing tillage applicability evaluation method, comprising: according to indoor test, respectively obtain soil total salt content index, soil organic matter content index, soil total nitrogen content index, soil available phosphorus content index, soil available potassium content index, soil natural moisture content index, soil bulk density index, according to the obtained information of related land capability index of ploughing surface soil, define salinized soil ploughing tillage applicability contribution degree index model, apply salinized soil ploughing tillage applicability contribution degree index model, complete the tillage applicability evaluation of target salinized soil ploughing.The application carries out quantitative evaluation to the comprehensive land capability of salinized soil ploughing, enriches the evaluation system of salinized soil ploughing comprehensive land capability, further accurately, quickly and effectively evaluates salinized soil ploughing comprehensive land capability index and its tillage applicability.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of agricultural technology, in particular to a method for evaluating the suitability of plowing and cultivation of saline soil based on comprehensive soil strength. BACKGROUND

[0002] Saline soil is a kind of land which is harmful to the growth of crops due to the accumulation of too much soluble salt on the surface of the soil. Its essence is the redistribution of various soluble salts in the horizontal or vertical direction of the ground, which causes a large amount of salt to accumulate on the surface of the soil. At the same time, factors such as climate, cultivation technology, and underground water level rising can also cause soil salinization.

[0003] Generally, the area where the saline soil is located has a flat terrain, deep soil layer, and is suitable for machine plowing, and has potential fertility, which is a very precious land resource. Through the development and utilization of saline soil, not only can the cultivated land area be expanded, the crop yield per unit area can be increased, the total grain yield can be improved, and the pressure on food can be eased, but also the green area can be expanded, the ecological environment can be improved, and the living standard of residents can be improved. Therefore, the targeted improvement of saline soil is the focus of attention of scholars at home and abroad. At the same time, it is an urgent task to establish a set of feasible, comprehensive, and fast and accurate evaluation method for the suitability of plowing and cultivation of saline soil. SUMMARY

[0004] The present application aims to provide a method for evaluating the suitability of plowing and cultivation of saline soil based on comprehensive soil strength, which quantitatively evaluates the comprehensive soil strength of saline soil, enriches the evaluation system of the suitability of plowing and cultivation of saline soil, and further accurately and quickly evaluates the suitability of plowing and cultivation of saline soil.

[0005] To achieve the above functions, the present application designs a method for evaluating the suitability of plowing and cultivation of saline soil based on comprehensive soil strength, which performs the following steps S1-S8 for the target saline soil to complete the evaluation of the suitability of plowing and cultivation:

[0006] Step S1: Collecting the sample to be tested, and obtaining the soil total salt content index a by indoor testing of the sample to be tested;

[0007] Step S2: Collecting the sample to be tested, and obtaining the soil organic matter content index b by indoor testing of the sample to be tested;

[0008] Step S3: Collecting the sample to be tested, and obtaining the soil total nitrogen content index c by indoor testing of the sample to be tested;

[0009] Step S4: Collecting the sample to be tested, and obtaining the soil available phosphorus content index d by indoor testing of the sample to be tested;

[0010] Step S5: Collecting the sample to be tested, and obtaining the soil available potassium content index e by indoor testing of the sample to be tested;

[0011] Step S6: Collect the sample to be tested, and acquire the soil natural moisture content index f by indoor testing on the sample to be tested;

[0012] Step S7: Collect the sample to be tested, and acquire the soil bulk density index g by indoor testing on the sample to be tested;

[0013] Step S8: According to the soil total salt content index a, the soil organic matter content index b, the soil total nitrogen content index c, the soil available phosphorus content index d, the soil available potassium content index e, the soil natural moisture content index f, and the soil bulk density index g, a contribution degree index model of the suitability of salinized soil for cultivation is constructed, and the suitability of the target salinized soil for cultivation is evaluated by using the contribution degree index model of the suitability of salinized soil for cultivation.

[0014] Advantages: Compared with the prior art, the advantages of the present application include:

[0015] The present application provides a method for evaluating the suitability of salinized soil for cultivation based on comprehensive soil strength, establishes a contribution degree index model of the suitability of salinized soil for cultivation based on multiple dimensions, quantitatively evaluates the comprehensive soil strength of salinized soil, enriches the evaluation system of the suitability of salinized soil for cultivation, and further accurately, quickly and comprehensively evaluates the suitability of salinized soil for cultivation. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a flowchart of a method for evaluating the suitability of salinized soil for cultivation based on comprehensive soil strength according to an embodiment of the present application;

[0017] Figure 2 is a framework diagram of a method for evaluating the suitability of salinized soil for cultivation based on comprehensive soil strength according to an embodiment of the present application. DETAILED DESCRIPTION

[0018] The present application will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and cannot be used to limit the protection scope of the present application.

[0019] The method for evaluating the suitability of salinized soil for cultivation based on comprehensive soil strength provided by the embodiment of the present application is used for the target salinized soil, refers to Figure 1 , Figure 2 , and performs the following steps S1-S8 to complete the evaluation of the suitability for cultivation:

[0020] Step S1: Collect the sample to be tested, and acquire the soil total salt content index a by indoor testing on the sample to be tested;

[0021] The specific steps of step S1 are as follows:

[0022] Step S1.1: Obtain 20 point positions of the average distribution on the surface of the target saline soil by measuring the total area of the target saline soil;

[0023] Step S1.2: Mix the soil at a depth of 20 cm at the 20 point positions on the surface of the target saline soil into one sample to be tested;

[0024] Step S1.3: Determine the total salt content S of the sample to be tested by the drying weight method;

[0025] Step S1.4: Assign the soil total salt content index a according to the value of the soil total salt content S;

[0026] The soil total salt content index a is determined according to the value of the soil total salt content S, when the soil total salt content 0

[0027] Step S2: Collect the sample to be tested, and obtain the soil organic matter content index b by indoor testing of the sample to be tested;

[0028] The specific steps of step S2 are as follows:

[0029] Step S2.1: Obtain 20 point positions of the average distribution on the surface of the target saline soil by measuring the total area of the target saline soil;

[0030] Step S2.2: Mix the soil at a depth of 20 cm at the 20 point positions on the surface of the target saline soil into one sample to be tested;

[0031] Step S2.3: Determine the organic matter content OM of the sample to be tested by the dry burning method;

[0032] Step S2.4: Assign the soil organic matter content index b according to the value of the soil organic matter content OM;

[0033] The soil organic matter content index b is determined according to the numerical value of the soil organic matter content OM, when the soil organic matter content 0<OM≤1%, the soil organic matter content index b=10; when the soil organic matter content 1%<OM≤2%, the soil organic matter content index b=20; when the soil organic matter content 2%<OM≤3%, the soil organic matter content index b=30; when the soil organic matter content 3%<OM≤4%, the soil organic matter content index b=40; when the soil organic matter content 4%<OM≤5%, the soil organic matter content index b=50; when the soil organic matter content 5%<OM≤6%, the soil organic matter content index b=60; when the soil organic matter content 6%<OM≤7%, the soil organic matter content index b=70; when the soil organic matter content 7%<OM≤8%, the soil organic matter content index b=80; when the soil organic matter content 8%<OM≤9%, the soil organic matter content index b=90; when the soil organic matter content 9%<OM≤10%, the soil organic matter content index b=100.

[0034] Step S3: Collecting the sample to be tested, and obtaining the soil total nitrogen content index c by indoor testing on the sample to be tested;

[0035] The specific steps of step S3 are as follows:

[0036] Step S3.1: Obtaining 20 point positions of the target saline soil cultivated land surface average distribution by measuring the total area of the target saline soil cultivated land;

[0037] Step S3.2: Digging the soil at a depth of 20 cm at 20 point positions of the target saline soil cultivated land surface to form a sample to be tested;

[0038] Step S3.3: Determining the soil total nitrogen content N by semi-micro Kjeldahl method;

[0039] Step S3.4: Assigning the soil total nitrogen content index c according to the numerical value of the soil total nitrogen content N;

[0040] The soil total nitrogen content index c is determined according to the numerical value of the soil total nitrogen content N, when the soil total nitrogen content 0

[0041] Step S4: Collecting the sample to be tested, and obtaining the soil available phosphorus content index d through indoor testing on the sample to be tested;

[0042] The specific steps of step S4 are as follows:

[0043] Step S4.1: Obtaining 20 point positions of the target saline soil cultivated land surface average distribution by measuring the total area of the target saline soil cultivated land;

[0044] Step S4.2: Digging the soil at a depth of 20 cm of the 20 point positions of the target saline soil cultivated land surface respectively to form a sample to be tested;

[0045] Step S4.3: Determining the soil available phosphorus content P through sodium bicarbonate extraction method;

[0046] Step S4.4: Assigning the soil available phosphorus content index d according to the numerical value of the soil available phosphorus content P;

[0047] The soil available phosphorus content index d is determined according to the numerical value of the soil available phosphorus content P, when the soil available phosphorus content 0

[0048] Step S5: Collecting the sample to be tested, and obtaining the soil available potassium content index e through indoor testing on the sample to be tested;

[0049] The specific steps of step S5 are as follows:

[0050] Step S5.1: Obtain 20 point positions of the target saline soil cultivated land surface average distribution by measuring the total area of the target saline soil cultivated land;

[0051] Step S5.2: Mix the soil at a depth of 20 cm of the 20 point positions of the target saline soil cultivated land surface into one sample to be tested;

[0052] Step S5.3: Determine the soil available potassium content K by ammonium acetate extraction-flame photometry;

[0053] Step S5.4: Assign a score to the soil available potassium content index e according to the numerical value of the soil available potassium content K;

[0054] The soil available potassium content index e is determined according to the numerical value of the soil available potassium content K. When the soil available potassium content is 0

[0055] Step S6: Collect the sample to be tested, and perform indoor testing on the sample to obtain the soil natural moisture content index f;

[0056] The specific steps of step S6 are as follows:

[0057] Step S6.1: Obtain 20 point positions of the target saline soil cultivated land surface average distribution by measuring the total area of the target saline soil cultivated land;

[0058] Step S6.2: Mix the soil at a depth of 20 cm of the 20 point positions of the target saline soil cultivated land surface into one sample to be tested;

[0059] Step S6.3: Determine the soil natural moisture content w by the cutting ring method;

[0060] Step S6.4: Assign a score to the soil natural moisture content index f according to the numerical value of the soil natural moisture content w;

[0061] The soil natural moisture content index f is determined according to the numerical value of the soil natural moisture content w, when the soil natural moisture content 0 < w ≤ 10%, the soil natural moisture content index f = 0; when the soil natural moisture content 10% < w ≤ 20%, the soil natural moisture content index f = 25; when the soil natural moisture content 20% < w ≤ 30%, the soil natural moisture content index f = 50; when the soil natural moisture content 30% < w ≤ 40%, the soil natural moisture content index f = 100; when the soil natural moisture content w > 40%, the soil natural moisture content index f = 0.

[0062] Step S7: Collecting the sample to be tested, and obtaining the soil bulk density index g by indoor testing on the sample to be tested;

[0063] The specific steps of step S7 are as follows:

[0064] Step S7.1: Obtaining 20 point positions of the target saline soil cultivated land surface average distribution by measuring the total area of the target saline soil cultivated land;

[0065] Step S7.2: Digging the soil at a depth of 20 cm of the 20 point positions of the target saline soil cultivated land surface respectively to form a sample to be tested;

[0066] Step S7.3: Determining the soil bulk density p by the cutting ring method;

[0067] Step S7.4: Assigning the soil bulk density index g according to the numerical value of the soil bulk density p;

[0068] The soil bulk density index g is determined according to the numerical value of the soil bulk density p, when the soil bulk density 1 g / cm 3 ≤ p ≤ 1.1 g / cm 3 , the soil bulk density index g = 100; when the soil bulk density 1.1 g / cm 3 ≤ p ≤ 1.2 g / cm 3 , the soil bulk density index g = 75; when the soil bulk density 1.2 g / cm 3 ≤ p ≤ 1.3 g / cm 3 , the soil bulk density index g = 50; when the soil bulk density 1.3 g / cm 3 ≤ p ≤ 1.4 g / cm 3 , the soil bulk density index g = 25; when the soil bulk density p > 1.4 g / cm 3 , the soil bulk density index g = 0.

[0069] Step S8: According to the soil total salt content index a, the soil organic matter content index b, the soil total nitrogen content index c, the soil available phosphorus content index d, the soil available potassium content index e, the soil natural water content index f, and the soil bulk density index g, a salinized soil cultivated land tillage applicability contribution degree index model is constructed, and the salinized soil cultivated land tillage applicability contribution degree index model is applied to complete the tillage applicability evaluation of the target salinized soil cultivated land.

[0070] The salinized soil cultivated land tillage applicability contribution degree index model in step S8 is as follows:

[0071] SSCCI=0.3×a+0.2×b+0.1×c+0.1×d+0.1×e+0.1×f+0.1×g

[0072] Wherein, SSCI is the salinized soil cultivated land tillage applicability contribution degree index, and the larger the SSCI value is, the higher the tillage applicability of the salinized soil cultivated land is.

[0073] The tillage applicability evaluation method of the target salinized soil cultivated land is as follows:

[0074] When SSCI∈(0, 20], the tillage applicability of the salinized soil cultivated land is poor;

[0075] When SSCI∈(20, 40], the tillage applicability of the salinized soil cultivated land is relatively poor;

[0076] When SSCI∈(40, 60], the tillage applicability of the salinized soil cultivated land is ordinary;

[0077] When SSCI∈(60, 80], the tillage applicability of the salinized soil cultivated land is good;

[0078] When SSCI∈(80, 100], the tillage applicability of the salinized soil cultivated land is excellent.

[0079] The salinized soil cultivated land tillage applicability contribution degree index SSCI is shown in Table 1 as follows:

[0080] Table 1 Salinized soil cultivated land tillage applicability contribution degree index SSCI

[0081] Salted soil tillage suitability Poor Fair Common Good Excellent SSCCI (0,20] (20,40] (40,60] (60,80] (80,100]

[0082] The following is an application embodiment of the present application:

[0083] The technical solution of the present application is further described by taking a salinized soil cultivated land in Xinjiang Uygur Autonomous Region as an example:

[0084] 1. By collecting the soil sample on site, the soil total salt content S is measured by the drying weight method, and the soil total salt content index a is obtained according to the scoring rule, that is, a=100.

[0085] 2. Through collecting the field soil sample, the soil organic matter content OM=8.5% is determined by using the dry burning method, and according to the scoring rule, the soil organic matter content index b=90 is obtained.

[0086] 3. Through collecting the field soil sample, the soil total nitrogen content N=0.17% is determined by using the semi-micro Kjeldahl method, and according to the scoring rule, the soil total nitrogen content index c=75 is obtained.

[0087] 4. Through collecting the field soil sample, the soil available phosphorus content P=0.035% is determined by using the sodium bicarbonate extraction method, and according to the scoring rule, the soil available phosphorus content index d=75 is obtained.

[0088] 5. Through collecting the field soil sample, the soil available potassium content K=1.6% is determined by using the ammonium acetate extraction-flame photometry method, and according to the scoring rule, the soil available potassium content index e=75 is obtained.

[0089] 6. Through collecting the field soil sample, the soil natural water content w=30% is determined by using the cutting ring method, and according to the scoring rule, the soil natural water content index f=50 is obtained.

[0090] 7. Through collecting the field soil sample, the soil bulk density p=1.15 g / cm 3 is determined by using the cutting ring method, and according to the scoring rule, the soil bulk density index g=75 is obtained.

[0091] 8. According to the obtained information of the related soil fertility indexes of the surface soil of the cultivated land, the contribution degree index of the salinized soil cultivated land is determined as SSCI=0.3x100+0.2x90+0.1x75+0.1x75+0.1x75+0.1x50+0.1x75=75.5, and according to Table 1, the cultivated land of the salinized soil has good suitability for cultivation.

[0092] The embodiments of the application are described in detail above with reference to the drawings, but the application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the application.

Claims

1. A method for evaluating the suitability of a salt-affected soil for cultivation based on the comprehensive soil strength, characterized in that, For the target saline soil, the following steps S1-S8 are performed to complete the suitability evaluation: Step S1: Collect the test sample, and obtain the soil total salt content index a by indoor testing of the test sample; The specific steps are as follows: Step S1.1: Obtain 20 points of the target saline soil by measuring the total area of the target saline soil; Step S1.2: Mix the soil at a depth of 20 cm at the 20 points on the surface of the target saline soil to obtain a test sample; Step S1.3: Determine the soil total salt content S of the test sample by the drying weight method; Step S1.4: Assign the soil total salt content index a according to the value of the soil total salt content S; The soil total salt content index a is determined according to the value of the soil total salt content S, when the soil total salt content 0 Step S2: Collect the test sample, and obtain the soil organic matter content index b by indoor testing of the test sample; Step S3: Collect the test sample, and obtain the soil total nitrogen content index c by indoor testing of the test sample; Step S4: Collect the test sample, and obtain the soil available phosphorus content index d by indoor testing of the test sample; Step S5: Collect the test sample, and obtain the soil available potassium content index e by indoor testing of the test sample; Step S6: Collect the test sample, and obtain the soil natural moisture content index f by indoor testing of the test sample; Step S7: Collect the test sample, and obtain the soil bulk density index g by indoor testing of the test sample; Step S8: Construct a saline soil cultivation suitability contribution index model according to the soil total salt content index a, the soil organic matter content index b, the soil total nitrogen content index c, the soil available phosphorus content index d, the soil available potassium content index e, the soil natural moisture content index f, and the soil bulk density index g, and complete the cultivation suitability evaluation of the target saline soil by applying the saline soil cultivation suitability contribution index model; The saline soil cultivation suitability contribution index model is as follows: SSCCI = 0.3 × a + 0.2 × b + 0.1 × c + 0.1 × d + 0.1 × e + 0.1 × f + 0.1 × g Wherein, SSCI is the saline soil cultivation suitability contribution index, the larger the SSCI value, the higher the cultivation suitability of the saline soil.

2. The method for evaluating the suitability of plowing and tillage of a comprehensive soil strength of saline soil according to claim 1, characterized in that, The specific steps of step S2 are as follows: Step S2.1: Obtain 20 points of the target saline soil by measuring the total area of the target saline soil; Step S2.2: Mix the soil at a depth of 20 cm at the 20 points on the surface of the target saline soil to obtain a test sample; Step S2.3: Determine the organic matter content OM of the test sample by the dry burning method; Step S2.4: According to the numerical value of the soil organic matter content OM, the soil organic matter content index b is assigned; The soil organic matter content index b is determined according to the numerical value of the soil organic matter content OM, when the soil organic matter content 0 < OM≤ 1%, the soil organic matter content index b = 10; when the soil organic matter content 1% < OM≤ 2%, the soil organic matter content index b = 20; when the soil organic matter content 2% < OM≤ 3%, the soil organic matter content index b = 30; when the soil organic matter content 3% < OM≤ 4%, the soil organic matter content index b = 40; when the soil organic matter content 4% < OM≤ 5%, the soil organic matter content index b = 50; when the soil organic matter content 5% < OM≤ 6%, the soil organic matter content index b = 60; when the soil organic matter content 6% < OM≤ 7%, the soil organic matter content index b = 70; when the soil organic matter content 7% < OM≤ 8%, the soil organic matter content index b = 80; when the soil organic matter content 8% < OM≤ 9%, the soil organic matter content index b = 90; when the soil organic matter content 9% < OM≤ 10%, the soil organic matter content index b = 100. 3.The method for evaluating the suitability of plowing and tillage of a comprehensive soil strength of saline soil according to claim 1, characterized in that, The specific steps of step S3 are as follows: Step S3.1: By measuring the total area of the target saline soil cultivated land, 20 point positions of the target saline soil cultivated land surface are obtained; Step S3.2: The soil at a depth of 20 cm of the 20 point positions of the target saline soil cultivated land surface is mixed into a sample to be measured; Step S3.3: The total nitrogen content N of the soil is determined by the semi-micro Kjeldahl method; Step S3.4: According to the numerical value of the total nitrogen content N of the soil, the total nitrogen content index c of the soil is assigned; The soil total nitrogen content index c is determined according to the numerical value of the soil total nitrogen content N, when the soil total nitrogen content 0 < N≤ 0.1%, the soil total nitrogen content index = 0; when the soil total nitrogen content 0.1% < N≤ 0.125%, the soil total nitrogen content index = 25; when the soil total nitrogen content 0.125% < N≤ 0.15%, the soil total nitrogen content index c = 50; when the soil total nitrogen content 0.15% < N≤ 0.175%, the soil total nitrogen content index = 75; when the soil total nitrogen content 0.175% < N≤ 0.2%, the soil total nitrogen content index = 100; when the soil total nitrogen content N > 0.2%, the soil total nitrogen content index = 0. 4.The method for evaluating the suitability of plowing and tillage of a comprehensive soil strength of saline soil according to claim 1, characterized in that, The specific steps of step S4 are as follows: Step S4.1: By measuring the total area of the target saline soil cultivated land, 20 point positions of the target saline soil cultivated land surface are obtained; Step S4.2: The soil at a depth of 20 cm of the 20 point positions of the target saline soil cultivated land surface is mixed into a sample to be measured; Step S4.3: The soil available phosphorus content P is determined by the sodium bicarbonate extraction method; Step S4.4: According to the numerical value of the soil available phosphorus content P, the soil available phosphorus content index d is assigned; The soil available phosphorus content index d is determined according to the numerical value of the soil available phosphorus content P, when the soil available phosphorus content 0 5. The method for evaluating the suitability of plowing and tillage of the comprehensive soil strength of saline soil according to claim 1, characterized in that, The specific steps of step S5 are as follows: Step S5.1: Obtain 20 point positions of the average distribution on the surface of the target saline soil cultivated land by measuring the total area of the target saline soil cultivated land; Step S5.2: Mix the soil at a depth of 20 cm of the 20 point positions on the surface of the target saline soil cultivated land into one sample to be measured; Step S5.3: Determine the soil available potassium content K by the ammonium acetate extraction-flame photometry method; Step S5.4: According to the numerical value of the soil available potassium content K, the soil available potassium content index e is assigned; The soil available potassium content index e is determined according to the numerical value of the soil available potassium content K, when the soil available potassium content 0 6.The method for evaluating the suitability of plowing and tillage of a comprehensive soil strength of saline soil according to claim 1, characterized in that, The specific steps of step S6 are as follows: Step S6.1: Obtain 20 point positions of the average distribution on the surface of the target saline soil cultivated land by measuring the total area of the target saline soil cultivated land; Step S6.2: Mix the soil at a depth of 20 cm of the 20 point positions on the surface of the target saline soil cultivated land into one sample to be measured; Step S6.3: Determine the soil natural water content w by the cutting ring method; Step S6.4: According to the numerical value of the soil natural water content w, the soil natural water content index f is assigned; The soil natural moisture content index f is determined according to the numerical value of the soil natural moisture content w, when the soil natural moisture content 0 < w ≤ 10%, the soil natural moisture content index f = 0; when the soil natural moisture content 10% < w ≤ 20%, the soil natural moisture content index f = 25; when the soil natural moisture content 20% < w ≤ 30%, the soil natural moisture content index f = 50; when the soil natural moisture content 30% < w ≤ 40%, the soil natural moisture content index f = 100; when the soil natural moisture content w > 40%, the soil natural moisture content index f = 0. 7.The method for evaluating the suitability of plowing and tillage of a comprehensive soil strength of saline soil according to claim 1, characterized in that, The specific steps of step S7 are as follows: Step S7.1: obtain 20 point positions of the target saline soil cultivated land surface average distribution by measuring the total area of the target saline soil cultivated land; Step S7.2: respectively dig the soil at a depth of 20 cm of the 20 point positions of the target saline soil cultivated land surface to form a sample to be measured; Step S7.3: measure the soil bulk density p by the cutting ring method; Step S7.4: score the soil bulk density index g according to the numerical value of the soil bulk density p; The soil bulk density index g is determined according to the magnitude of the soil bulk density p, when the soil bulk density p is 1 g / cm 3 ≤1.1 g / cm 3 , the soil bulk density index g=100; when the soil bulk density p is 1.1 g / cm 3 ≤1.2 g / cm 3 , the soil bulk density index g=75; when the soil bulk density p is 1.2 g / cm 3 ≤1.3 g / cm 3 , the soil bulk density index g=50; when the soil bulk density p is 1.3 g / cm 3 ≤1.4 g / cm 3 , the soil bulk density index g=25; when the soil bulk density p>1.4 g / cm 3 , the soil bulk density index g=0. 8.The method for evaluating the suitability of plowing and tillage of a comprehensive soil strength of saline soil according to claim 1, characterized in that, The evaluation method of the cultivation suitability of the target saline soil cultivated land is as follows: When SSCI ∈ (0, 20], the cultivation suitability of the saline soil cultivated land is poor; When SSCI ∈ (20, 40], the cultivation suitability of the saline soil cultivated land is relatively poor; When SSCI ∈ (40, 60], the cultivation suitability of the saline soil cultivated land is ordinary; When SSCI ∈ (60, 80], the cultivation suitability of the saline soil cultivated land is good; When SSCI ∈ (80, 100], the cultivation suitability of the saline soil cultivated land is excellent.

Images