CN105787802A - Organic farm site selection method and system - Google Patents

Abstract

The invention provides an organic farm site selection method and system. The method comprises the following steps: when an organic farm site selection request is received, extracting undistributed each area land resource in a database, and obtaining environment quality parameters of each area land resource; according to the environment quality parameters, evaluating environment quality of each area land resource; and taking a land resource with a highest evaluation result as an organic farm site selection result for output. The system comprises an environment quality parameter obtaining unit, an environment quality evaluation unit and a site selection result output unit. According to the organic farm site selection method and system, scientific analysis is carried out on each area land resource, such that the utilization rate of land resources and production resources are effectively improved.

Description

Organic farm site selecting method and system

Technical field

The present invention relates to field of computer technology, particularly relate to a kind of organic farm addressing distribution method and system.

Background technology

Organic agriculture is as a kind of emerging mode of agriculture, in accordance with specific agricultural production principle, do not adopt biology and product thereof that genetic engineering obtains aborning, do not use the materials such as the pesticide of chemosynthesis, chemical fertilizer, growth regulator, feed additive, follow the course of nature and Ecological Principle, coordinate the balance of plant husbandry and aquaculture, adopt a series of continuable agricultural technology to maintain a kind of mode of agriculture of continual and steady system agricultural industry.And organic farm environment is the basis that organic agriculture produces, the quality of organic farm environment is extremely important for the production of organic agriculture, selects a good production environment to be to ensure that the key of organic products quality.

In prior art, the mode of random assortment is generally adopted to carry out the addressing on organic farm.Or simply organic farm content of beary metal is carried out easy detection, the addressing of organic farm is carried out under the premise that metal does not exceed standard, and producing of organic agronomic crop is higher to the requirement of soil and environment, utilize above-mentioned addressing mode that organic agronomic crop can be caused to yield poorly down, thus both having caused that land resource can not be fully used, waste again production cost.It is therefore proposed that organic farm site selecting method of a kind of science becomes problem demanding prompt solution.

Summary of the invention

For defect of the prior art, the present invention provides a kind of organic farm site selecting method and system, organic farm is carried out overall merit by addressing process, the addressing of organic farm is analysed scientifically, thus being effectively increased the utilization rate of land resource and the resources of production.

First aspect, the present invention provides a kind of organic farm site selecting method, including:

When receiving the addressing request of organic farm, data base extracts unappropriated each Area Land Resources, and obtains the environmental quality parameter of described each Area Land Resources；

According to described environmental quality parameter, the environmental quality of described each Area Land Resources is tested and assessed；

Land resource the highest for evaluating result is exported as organic farm addressing result.

Preferably, described environmental quality parameter includes: natural environment parameter, nutrient content parameter and peripheral facility parameter；

Described natural environment parameter includes: soil pollutant content, loading of air pollutant and irrigation water pollutant load；

Described nutrient content parameter includes: total nitrogen content of soil, content of soil available phosphor, Soil Available potassium content and soil organic matter content；

Described peripheral facility parameter includes: protection facility is to organic farm distance and polluter to the distance on organic farm.

Preferably, described according to described environmental quality parameter, the environmental quality of described each Area Land Resources is tested and assessed, including:

Described environmental quality parameter is carried out standardization processing；

Environmental quality parameter after standardization processing is normalized；

Primary test and appraisal are carried out, to obtain primary environmental quality test and appraisal parameter according to the environmental quality parameter after normalized；

Described primary environmental quality test and appraisal parameter is normalized；

According to the primary environmental quality test and appraisal parameter after normalized, the land resource in described each region is carried out final environmental quality test and appraisal.

Preferably, described environmental quality parameter is being carried out standardization processing, including:

When described environmental quality parameter is natural environment parameter, adopt formula (1) that described environmental quality parameter is entered standardization processing:

$C^{\′}=\frac{C-C_{min}}{C_{max}-C_{min}}$ Formula (1)；

When described environmental quality parameter is nutrient content parameter or peripheral facility parameter, adopt formula (2) that described environmental quality parameter is carried out standardization processing:

$C^{\′}=\frac{C_{max}-C}{C_{max}-C_{min}}$ Formula (2)；

Wherein, C is the environmental quality parameter before standardization processing, and C' is the environmental quality parameter after standardization processing, C_minFor the minima of environmental quality parameter, C_maxMaximum for environmental quality parameter.

Preferably, the environmental quality parameter after standardization processing is normalized, including:

When described environmental quality parameter is natural environment parameter, adopt Coattail catastrophe model that the environmental quality parameter after standardization processing is normalized；

When described environmental quality parameter is nutrient content parameter, adopt MODEL OF BUTTERFLY CATASTROPHE that the environmental quality parameter after standardization processing is normalized；

When described environmental quality parameter is peripheral facility parameter, adopt Cusp Catastrophe Model that the environmental quality parameter after standardization processing is normalized.

Preferably, described carry out primary test and appraisal according to the environmental quality parameter after normalized, to obtain primary environmental quality test and appraisal parameter, including:

Take the minima of the nutrient content parameter after the natural environment parameter after normalized, normalized and the peripheral facility parameter after normalized respectively as described primary environmental quality test and appraisal parameter.

Preferably, described parameter of described primary environmental quality being tested and assessed is normalized, including:

Adopt Coattail catastrophe model that described primary environmental quality test and appraisal parameter is normalized.

Preferably, the land resource in described each region is carried out final environmental quality test and appraisal by the described primary environmental quality according to after normalized parameter of testing and assessing, including:

Take the minima of the test and appraisal parameter of the primary environmental quality after normalized, and using this minima as final environmental quality evaluating result.

Second aspect, the present invention provides a kind of organic farm site selection system, including:

Environmental quality parameter acquiring unit, for when receiving the addressing request of organic farm, extracting unappropriated each Area Land Resources, and obtain the environmental quality parameter of described each Area Land Resources in data base；

Environmental quality test and appraisal unit, for testing and assessing to the environmental quality of described each Area Land Resources according to described environmental quality parameter；

Addressing result output unit, for exporting land resource the highest for evaluating result as organic farm addressing result.

Preferably, described environmental quality parameter includes: natural environment parameter, nutrient content parameter and peripheral facility parameter；

Described natural environment parameter includes: soil pollutant content, loading of air pollutant and irrigation water pollutant load；

Described nutrient content parameter includes: total nitrogen content of soil, content of soil available phosphor, Soil Available potassium content and soil organic matter content；

Peripheral facility parameter includes: protection facility is to organic farm distance and polluter to the distance on organic farm.

As shown from the above technical solution, organic farm site selecting method of the present invention and system, when receiving the addressing request of organic farm, data base extracts unappropriated each Area Land Resources, and obtains the environmental quality parameter of described each Area Land Resources；According to described environmental quality parameter, the environmental quality of described each Area Land Resources is tested and assessed；Finally land resource the highest for evaluating result is exported as organic farm addressing result.Thus, each Area Land Resources is analysed scientifically, thus being effectively increased the utilization rate of land resource and the resources of production.

Accompanying drawing explanation

The schematic flow sheet of organic farm site selecting method that Fig. 1 provides for one embodiment of the invention；

The schematic flow sheet of organic farm site selecting method that Fig. 2 provides for another embodiment of the present invention；

The structural representation of organic farm site selection system that Fig. 3 provides for one embodiment of the invention.

Detailed description of the invention

For making the purpose of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is carried out clear, complete description, obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on embodiments of the invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.

Fig. 1 illustrates the schematic flow sheet of organic farm site selecting method that one embodiment of the invention provides, as it is shown in figure 1, organic farm site selecting method of the present embodiment is as described below.

101, when receiving the addressing request of organic farm, data base extracts unappropriated each Area Land Resources, and obtains the environmental quality parameter of described each Area Land Resources.

Should be noted that above-mentioned environmental quality parameter includes: natural environment parameter, nutrient content parameter and peripheral facility parameter.

Natural environment parameter includes: soil pollutant content, loading of air pollutant and irrigation water pollutant load；

Described nutrient content parameter includes: total nitrogen content of soil, content of soil available phosphor, Soil Available potassium content and soil organic matter content；

Described peripheral facility parameter includes: protection facility is to organic farm distance and polluter to the distance on organic farm.

Additionally, also can choose suitable environmental quality parameter according to practical situation, environmental quality parameter is not specifically chosen content and is defined by the present embodiment.

The present embodiment chooses above-mentioned each parameter as environmental quality parameter, do not only take into account soil nutrient content, it is additionally contemplates that organic agriculture place place natural environment is on the impact on organic farm and the polluter of organic farm periphery and the protection facility impact on organic farm environmental quality of organic farm, therefore, compared with organic farm site selecting method of single evaluation standard, the factor of natural environment relevant to organic farm environmental quality and peripheral facility factor are joined in the evaluation to each organic farm environmental quality, organic farm site selecting method of the present embodiment is pointed to the growing environment of organic agronomic crop, it is thus possible to improve organic farm addressing accuracy for individual instances, the utilization rate making land resource and the resources of production effectively improves.

102, according to described environmental quality parameter, the environmental quality of described each Area Land Resources is tested and assessed.

When practical application, according to above-mentioned natural environment parameter, nutrient content parameter and peripheral facility parameter, can adopt catastrophe progression method that the environmental quality of each Area Land Resources is tested and assessed.

For example, can using above-mentioned soil pollutant content, loading of air pollutant, irrigation water pollutant load, total nitrogen content of soil, content of soil available phosphor, Soil Available potassium content, soil organic matter content, protection facility to organic farm distance and polluter to the distance on organic farm as sudden change Series Algorithm in first order parameter；Carried out conversion by first order parameter by Coattail catastrophe model, MODEL OF BUTTERFLY CATASTROPHE or Cusp Catastrophe Model and obtain second level parameter: natural environment parameter, point content parameter and peripheral facility parameter；Adopt Coattail catastrophe model that above-mentioned second level parameter is converted, obtain the environmental quality evaluating result of this Area Land Resources as third level result.

103, land resource the highest for evaluating result is exported as organic farm addressing result.

Should be noted that the evaluating result value adopting the environmental quality test and appraisal carrying out land resource in manner just described is between 0～1.Therefore, evaluating result height illustrates that the environmental quality evaluating result of this land resource is good.

In a particular application, profit carries out the environmental quality test and appraisal of each Area Land Resources in manner just described, and land resource the highest for evaluating result is exported as organic farm addressing result.

Organic farm site selecting method of the present embodiment, when receiving the addressing request of organic farm, extracts unappropriated each Area Land Resources in data base, and obtains the environmental quality parameter of described each Area Land Resources；According to described environmental quality parameter, the environmental quality of described each Area Land Resources is tested and assessed；Finally land resource the highest for evaluating result is exported as organic farm addressing result.Thus, each Area Land Resources is analysed scientifically, thus being effectively increased the utilization rate of land resource and the resources of production.

Fig. 2 illustrates the schematic flow sheet of organic farm site selecting method that one embodiment of the invention provides, as in figure 2 it is shown, organic farm site selecting method of the present embodiment is as described below.

201, when receiving the addressing request of organic farm, data base extracts unappropriated each Area Land Resources, and obtains the environmental quality parameter of described each Area Land Resources.

Environmental quality parameter includes: natural environment parameter, nutrient content parameter and peripheral facility parameter；

Natural environment parameter includes: soil pollutant content, loading of air pollutant and irrigation water pollutant load；

Nutrient content parameter includes: total nitrogen content of soil, content of soil available phosphor, Soil Available potassium content and soil organic matter content；

Peripheral facility parameter includes: protection facility is to organic farm distance and polluter to the distance on organic farm.

202, described environmental quality parameter is carried out standardization processing.

Will be understood that, owing to the general unit of various environmental quality parameters is different with form, and the natural environment parameter that needs requirement above-mentioned in actual addressing process is the smaller the better, require that above-mentioned nutrient content parameter and peripheral facility parameter are the bigger the better, accordingly, it would be desirable in different ways above-mentioned each environmental quality parameter is standardized.

Specifically, when environmental quality parameter is natural environment parameter, when namely environmental quality parameter is soil pollutant content, loading of air pollutant or irrigation water pollutant load, adopt formula (1) that described environmental quality parameter is entered standardization processing:

$C^{\′}=\frac{C-C_{min}}{C_{max}-C_{min}}$ Formula (1)；

When described environmental quality parameter is nutrient content parameter or peripheral facility parameter; namely environmental quality parameter be total nitrogen content of soil, content of soil available phosphor, Soil Available potassium content, soil organic matter content, protection facility to organic farm distance or polluter to the distance on organic farm time, described environmental quality parameter is carried out standardization processing by employing formula (2):

$C^{\′}=\frac{C_{max}-C}{C_{max}-C_{min}}$ Formula (2)；

Wherein, C is the environmental quality parameter before standardization processing, and C' is the environmental quality parameter after standardization processing, C_minFor the minima of environmental quality parameter, C_maxMaximum for environmental quality parameter.

When practical application, above-mentioned C_minAnd C_maxCan be obtained by concerned countries standard in open data.

For example, the maximum (C of soil pollutant content_max) China soil environment quality secondary standard shown in following table obtains, minima C_minCan be 0.

Maximum (the C of farmland irrigating water's pollutant load_max) can each index shown in following table obtain, minima C_minCan be 0.

In upper table, a represents processing, the cooking and peeling vegetable；B represents and eats class vegetable, melon and herbaceous fruit raw；C represents that having certain water conservancy fills row's facility, can guarantee that certain draining and the area of groundwater flow condition, or has certain freshwater resources can meet the area of salinity in the flushing soil body, and field irrigation water quality total salt quantity index can suitably be relaxed.

Maximum (the C of loading of air pollutant_max) can each index shown in following table obtain, minima C_minCan be 0.

The maximum C of the nutrient content parameter of organic farm soil_maxWith minima C_minShown in following table:

From the foregoing, distinguish the kind of environmental quality parameter, it is respectively adopted above-mentioned formula (1) and each environmental quality parameter is carried out standardization processing by formula (2).

Should be noted that, the Items corresponding due to above-mentioned soil pollutant content, loading of air pollutant and irrigation water pollutant load is more, therefore, first projects can be carried out standardization processing, taking after standardization processing closest to one of higher limit as desired value, namely the minima after standardization is as desired value again.

203, the environmental quality parameter after standardization processing is normalized.

Specifically, according to C₁Represent soil pollutant content, C₂Represent loading of air pollutant, C₃Represent irrigation water pollutant load, C₄Represent total nitrogen content of soil, C₅Represent content of soil available phosphor, C₆Represent Soil Available potassium content, C₇Represent soil organic matter content, C₈Represent protection facility to organic farm apart from, C₉Represent the polluter distance to organic farm, then each ambient parameter after standardization processing is expressed as C₁'～C₉'。

When described environmental quality parameter is natural environment parameter, adopt Coattail catastrophe model that the environmental quality parameter after standardization processing is normalized；

Environmental quality parameter after normalized is represented by:

$X_{C_1}=\sqrt{C_1^{\′}};X_{C_2}=\sqrt[3]{C_2^{\′}};X_{C_3}=\sqrt[4]{C_3^{\′}};$

When described environmental quality parameter is nutrient content parameter, adopt MODEL OF BUTTERFLY CATASTROPHE that the environmental quality parameter after standardization processing is normalized；

Environmental quality parameter after normalized is represented by:

$X_{C_4}=\sqrt{C_4^{\′}};X_{C_5}=\sqrt[3]{C_5^{\′}};X_{C_6}=\sqrt[4]{C_6^{\′}};X_{C_7}=\sqrt[5]{C_7^{\′}};$

When described environmental quality parameter is peripheral facility parameter, adopt Cusp Catastrophe Model that the environmental quality parameter after standardization processing is normalized；

Environmental quality parameter after normalized is represented by:

$X_{C_8}=\sqrt{C_8^{\′}};X_{C_9}=\sqrt[3]{C_9^{\′}}.$

204, primary test and appraisal are carried out according to the environmental quality parameter after normalized, to obtain primary environmental quality test and appraisal parameter.

It will be appreciated that owing to above-mentioned natural environment parameter, nutrient content parameter and peripheral facility parameter are each other without the parameter influencing each other and interacting, without interdependence between three kinds of namely above-mentioned parameters.Therefore, according to incomplementarity principle, the environmental quality parameter after above-mentioned normalized is carried out primary test and appraisal.

Specifically, the minima of the natural environment parameter after normalized, the nutrient content parameter after normalized and the peripheral facility parameter after normalized can be taken respectively as described primary environmental quality test and appraisal parameter.

Primary environmental quality test and appraisal parameter can be expressed as:

$B_1=\min \{X_{C_1},X_{C_2},X_{C_3}\};$

$B_2=\min \{X_{C_4},X_{C_5},X_{C_6},X_{C_7}\};$

$B_3=\min \{X_{C_8},X_{C_9}\}.$

Wherein, B₁Represent the primary environmental quality test and appraisal parameter of natural environment parameter；B₂Represent the primary environmental quality test and appraisal parameter of nutrient content parameter；B₃Represent that periphery calls in the primary environmental quality test and appraisal parameter of parameter.

205, described primary environmental quality test and appraisal parameter is normalized.

Specifically, adopt Coattail catastrophe model that described primary environmental quality test and appraisal parameter is normalized.

Primary environmental quality test and appraisal parameter after normalization is represented by:

$X_{B_1}=\sqrt{B_1^{\′}};X_{B_2}=\sqrt[3]{B_2^{\′}};X_{B_3}=\sqrt[4]{B_3^{\′}}.$

206, according to the primary environmental quality test and appraisal parameter after normalized, the land resource in described each region is carried out final environmental quality test and appraisal.

Specifically, take the minima of the test and appraisal parameter of the primary environmental quality after normalized, and using this minima as final environmental quality evaluating result；

Final environmental quality evaluating result is:

$A=\min \{X_{B_1},X_{B_2},X_{B_3}\}.$

207, land resource the highest for evaluating result is exported as organic farm addressing result.

From the foregoing, the span of above-mentioned environmental quality evaluating result A is 0～1, and the environmental quality of the highest this Area Land Resources of explanation of value of A is more good.Therefore, land resource the highest for evaluating result is exported as organic farm addressing result.

The environmental quality test and appraisal of above-mentioned employing all adopt the mode taking minima, thereby guarantee that under the satisfactory premise of minima, and the environmental quality test and appraisal of each Area Land Resources are proposed more reliable evaluating result.

Organic farm site selecting method of the present embodiment, when receiving the addressing request of organic farm, extracts unappropriated each Area Land Resources in data base, and obtains the environmental quality parameter of described each Area Land Resources；According to described environmental quality parameter, the environmental quality of described each Area Land Resources is tested and assessed；Finally land resource the highest for evaluating result is exported as organic farm addressing result.Thus, each Area Land Resources is analysed scientifically, thus being effectively increased the utilization rate of land resource and the resources of production.

Fig. 3 illustrates organic farm site selection system that one embodiment of the invention provides, as described in Figure 3, and organic farm site selection system of the present embodiment, including: environmental quality parameter acquiring unit 31, environmental quality test and appraisal unit 32 and addressing result output unit 33.

Environmental quality parameter acquiring unit 31, for when receiving the addressing request of organic farm, extracting unappropriated each Area Land Resources, and obtain the environmental quality parameter of described each Area Land Resources in data base；

Environmental quality test and appraisal unit 32, for testing and assessing to the environmental quality of described each Area Land Resources according to described environmental quality parameter；

Addressing result output unit 33, for exporting land resource the highest for evaluating result as organic farm addressing result.

Should be noted that above-mentioned environmental quality parameter includes: natural environment parameter, nutrient content parameter and peripheral facility parameter；

Described natural environment parameter includes: soil pollutant content, loading of air pollutant and irrigation water pollutant load；

Described nutrient content parameter includes: total nitrogen content of soil, content of soil available phosphor, Soil Available potassium content and soil organic matter content；

Peripheral facility parameter includes: protection facility is to organic farm distance and polluter to the distance on organic farm.

Preferably, environmental quality test and appraisal unit 32, specifically for:

Described environmental quality parameter is carried out standardization processing；

Environmental quality parameter after standardization processing is normalized；

Primary test and appraisal are carried out, to obtain primary environmental quality test and appraisal parameter according to the environmental quality parameter after normalized；

Described primary environmental quality test and appraisal parameter is normalized；

According to the primary environmental quality test and appraisal parameter after normalized, the land resource in described each region is carried out final environmental quality test and appraisal.

Preferably, environmental quality test and appraisal unit 32, it is additionally operable to when described environmental quality parameter is natural environment parameter, adopts formula (1) that described environmental quality parameter is entered standardization processing:

$C^{\′}=\frac{C-C_{min}}{C_{max}-C_{min}}$ Formula (1)；

When described environmental quality parameter is nutrient content parameter or peripheral facility parameter, adopt formula (2) that described environmental quality parameter is carried out standardization processing:

$C^{\′}=\frac{C_{max}-C}{C_{max}-C_{min}}$ Formula (2)；

Wherein, C is the environmental quality parameter before standardization processing, and C' is the environmental quality parameter after standardization processing, C_minFor the minima of environmental quality parameter, C_maxMaximum for environmental quality parameter.

Preferably, environmental quality test and appraisal unit 32, it is additionally operable to when described environmental quality parameter is natural environment parameter, adopts Coattail catastrophe model that the environmental quality parameter after standardization processing is normalized；

When described environmental quality parameter is nutrient content parameter, adopt MODEL OF BUTTERFLY CATASTROPHE that the environmental quality parameter after standardization processing is normalized；

When described environmental quality parameter is peripheral facility parameter, adopt Cusp Catastrophe Model that the environmental quality parameter after standardization processing is normalized.

Preferably, environmental quality test and appraisal unit 32, it is additionally operable to the minima of the nutrient content parameter after the natural environment parameter after taking normalized respectively, normalized and the peripheral facility parameter after normalized as described primary environmental quality test and appraisal parameter.

Preferably, environmental quality test and appraisal unit 32, it is additionally operable to adopt Coattail catastrophe model that described primary environmental quality test and appraisal parameter is normalized.

Preferably, environmental quality test and appraisal unit 32, it is additionally operable to the minima of the test and appraisal parameter of the primary environmental quality after taking normalized, and using this minima as final environmental quality evaluating result.

Organic farm site selection system of the present embodiment, it is possible to for performing the technical scheme of embodiment of the method shown in above-mentioned Fig. 1 or Fig. 2, it is similar with technique effect that it realizes principle, repeats no more herein.

Organic farm site selection system of the present embodiment, when receiving the addressing request of organic farm, extracts unappropriated each Area Land Resources in data base, and obtains the environmental quality parameter of described each Area Land Resources；According to described environmental quality parameter, the environmental quality of described each Area Land Resources is tested and assessed；Finally land resource the highest for evaluating result is exported as organic farm addressing result.Thus, each Area Land Resources is analysed scientifically, thus being effectively increased the utilization rate of land resource and the resources of production.

Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to foregoing embodiments, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein some or all of technical characteristic is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of the claims in the present invention.

Claims (10)

1. organic farm site selecting method, it is characterised in that described method includes:

When receiving the addressing request of organic farm, data base extracts unappropriated each Area Land Resources, and obtains the environmental quality parameter of described each Area Land Resources；

According to described environmental quality parameter, the environmental quality of described each Area Land Resources is tested and assessed；

Land resource the highest for evaluating result is exported as organic farm addressing result.

2. method according to claim 1, it is characterised in that described environmental quality parameter includes: natural environment parameter, nutrient content parameter and peripheral facility parameter；

Described natural environment parameter includes: soil pollutant content, loading of air pollutant and irrigation water pollutant load；

Described nutrient content parameter includes: total nitrogen content of soil, content of soil available phosphor, Soil Available potassium content and soil organic matter content；

Described peripheral facility parameter includes: protection facility is to organic farm distance and polluter to the distance on organic farm.

3. method according to claim 2, it is characterised in that described according to described environmental quality parameter, the environmental quality of described each Area Land Resources is tested and assessed, including:

Described environmental quality parameter is carried out standardization processing；

Environmental quality parameter after standardization processing is normalized；

Primary test and appraisal are carried out, to obtain primary environmental quality test and appraisal parameter according to the environmental quality parameter after normalized；

Described primary environmental quality test and appraisal parameter is normalized；

According to the primary environmental quality test and appraisal parameter after normalized, the land resource in described each region is carried out final environmental quality test and appraisal.

4. method according to claim 3, it is characterised in that described environmental quality parameter is being carried out standardization processing, including:

When described environmental quality parameter is natural environment parameter, adopt formula (1) that described environmental quality parameter is entered standardization processing:

$C^{\′}=\frac{C-C_{min}}{C_{max}-C_{min}}$ Formula (1)；

When described environmental quality parameter is nutrient content parameter or peripheral facility parameter, adopt formula (2) that described environmental quality parameter is carried out standardization processing:

$C^{\′}=\frac{C_{max}-C}{C_{max}-C_{min}}$ Formula (2)；

Wherein, C is the environmental quality parameter before standardization processing, and C' is the environmental quality parameter after standardization processing, C_minFor the minima of environmental quality parameter, C_maxMaximum for environmental quality parameter.

5. method according to claim 3, it is characterised in that the environmental quality parameter after standardization processing is normalized, including:

When described environmental quality parameter is natural environment parameter, adopt Coattail catastrophe model that the environmental quality parameter after standardization processing is normalized；

When described environmental quality parameter is nutrient content parameter, adopt MODEL OF BUTTERFLY CATASTROPHE that the environmental quality parameter after standardization processing is normalized；

When described environmental quality parameter is peripheral facility parameter, adopt Cusp Catastrophe Model that the environmental quality parameter after standardization processing is normalized.

6. method according to claim 3, it is characterised in that described carry out primary test and appraisal according to the environmental quality parameter after normalized, to obtain primary environmental quality test and appraisal parameter, including:

Take the minima of the nutrient content parameter after the natural environment parameter after normalized, normalized and the peripheral facility parameter after normalized respectively as described primary environmental quality test and appraisal parameter.

7. method according to claim 3, it is characterised in that described parameter of described primary environmental quality being tested and assessed is normalized, including:

Adopt Coattail catastrophe model that described primary environmental quality test and appraisal parameter is normalized.

8. method according to claim 3, it is characterised in that the land resource in described each region is carried out final environmental quality test and appraisal by the described primary environmental quality according to after normalized parameter of testing and assessing, including:

Take the minima of the test and appraisal parameter of the primary environmental quality after normalized, and using this minima as final environmental quality evaluating result.

9. organic farm site selection system, it is characterised in that described system includes:

Environmental quality parameter acquiring unit, for when receiving the addressing request of organic farm, extracting unappropriated each Area Land Resources, and obtain the environmental quality parameter of described each Area Land Resources in data base；

Environmental quality test and appraisal unit, for testing and assessing to the environmental quality of described each Area Land Resources according to described environmental quality parameter；

Addressing result output unit, for exporting land resource the highest for evaluating result as organic farm addressing result.

10. system according to claim 9, it is characterised in that described environmental quality parameter includes: natural environment parameter, nutrient content parameter and peripheral facility parameter；

Described natural environment parameter includes: soil pollutant content, loading of air pollutant and irrigation water pollutant load；

Described nutrient content parameter includes: total nitrogen content of soil, content of soil available phosphor, Soil Available potassium content and soil organic matter content；

Peripheral facility parameter includes: protection facility is to organic farm distance and polluter to the distance on organic farm.