CN108812153A - A kind of shallot nutrient Precision management method - Google Patents
A kind of shallot nutrient Precision management method Download PDFInfo
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- CN108812153A CN108812153A CN201810715416.XA CN201810715416A CN108812153A CN 108812153 A CN108812153 A CN 108812153A CN 201810715416 A CN201810715416 A CN 201810715416A CN 108812153 A CN108812153 A CN 108812153A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
- A01G22/35—Bulbs; Alliums, e.g. onions or leeks
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C21/00—Methods of fertilising, sowing or planting
- A01C21/002—Apparatus for sowing fertiliser; Fertiliser drill
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C21/00—Methods of fertilising, sowing or planting
- A01C21/007—Determining fertilization requirements
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Abstract
The present invention relates to a kind of shallot nutrient Precision management methods, including steps are as follows:1) determination of shallot yield response coefficient, the 2) determination of target output:According to local previous shallot output condition, the target output in plantation plot is determined;3) determination of yield response:Yield response (t/ha)=yield response coefficient × target output (t/ha);4) the best amount of nutrients of shallot is obtained according to target output, yield response, agronomy efficiency calculation;5) fertilizing management method is determined according to soil nutrient Class Of Supply and the best amount of nutrients of shallot.The present invention accurately calculates precipitation amount according to shallot target output, and nutrition management method is refined according to working condition, shallot can be achieved and produce upper nutrient Precision management, avoid precipitation and application improper, improve the yield and quality of shallot, the income for increasing peasant has achieved the purpose that increase production and improve productivity.
Description
Technical field
The present invention relates to a kind of shallot nutrient Precision management methods, belong to the technical field of agricultural cultivation.
Background technique
Shallot nutritive value with higher (containing allicin, allyl sulfide, niacin, stearic acid, vitamin etc.) and
Medical value (can treat have a headache and fever, have a stomachache, indigestion, sore tumour, dysentery, children's void close, reduce gastric cancer etc.), be
A kind of very universal spicing product, occupy important role in the cooking in people's daily life.It is not only domestic important
Anniversary stable market supply vegetables are also one of the important vegetables of foreign exchange earning.China is the major country of shallot cultivation, is flowed from the Yellow River
There are cultivation, 15,000,000 mu of long-term cultivated area or more in domain to northeast various regions, and shallot plantation is also produced as the pillar in many places
Industry.
Shallot growth has stronger adaptability, of less demanding to edaphic condition, but because its root system is smaller, absorbability is weak,
Good growth and development needs N P and K balance fertilizing, and in the plantation of current shallot, blindness fertilising, single fertilising, excessive fertilization are not
It is rationally generally existing with fertile problem, lead to a large amount of fertilizer loss, waste, increases cost.
Jiang Lihua investigation discovery, nitrogenous fertilizer (in terms of N) dosage is up to 600kg/hm in the production of Shandong Province Zhangqiu shallot2, phosphorus
Fertilizer is up to 300kg/hm2(with P2O5Meter), and the investment of potash fertilizer only has 100kg/hm2(with K2O meter) left and right【Jiang Lihua, Liu Zhaohui,
Zhang Wenjun waits nitrogen to research [J] the plant nutrient and fertilizer science of shallot yield effect and target value of N supply
Report, 2007,13 (5):890-896】.
Zhang Yufeng research is it has also been found that local farmers habit on shallot produces entirely is planted using the compound fertilizer of 15-15-15
Quaternary nitrogen (in terms of N) phosphorus is (with P2O5Meter) potassium is (with K2O meter) dosage is 276kg/hm2The case where it is more universal【Zhang Yufeng, Dong Liang,
Li Yan waits controlled release BB fertilizer to influence [J] North China Agricultural Journal of shallot growth and law of nutritive absorption, 2010,25 (S1):230-
235】。
By visible above, the present upper precipitation of shallot production is extensive, lacks the guidance method of science, this is in certain journey
Further increasing for shallot yield is limited on degree, reduces the staple character of shallot.The excessive investment meeting of fertilizer simultaneously
Cause utilization rate of fertilizer low, extra nutrient loss causes fertilizer waste and environmental pollution into environment.
Soil nutrient has been managed, has rationally been applied fertilizer, has been the key technical problem for being related to China's agricultural sustainable development.
The situation of soil nutrient directly affects the yield and quality of kind of plant.Therefore, soil nutrient status is studied, is produced for agricultural product
Demand provides reasonable fertilizer recommendations, is the premise and basis for promoting China's precision agriculture to implement.
With the development of the times, social progress, Ecological Civilization Construction are increasingly valued by people, in agricultural production
Nutrient, which precisely puts into, improves plant recovery of nutrient becomes common recognition, therefore, in the plantation of current shallot blindly fertilising, single fertilising,
The unreasonable of excessive fertilization uses fertile problem, needs a kind of nutrient Precision management technology.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of shallot nutrient Precision management method.By combining planting site
The indexs such as block soil fertility height, shallot target output, nutrient yield response and agronomy efficiency, with the principle of nutrient collaboration optimization, warp
Cross reasonable nutrient supply amount and method of supplying that a large amount of field test data simulations calculate shallot production.The nutrition management method
It is suitble to current shallot cropping pattern, realizes shallot and produce upper nutrient Precision management, reduce fertilizers input amount, improve plantation
Benefit reduces environmental pollution.
Term explanation:
Yield response:It is the difference applied the yield of certain nutrient and do not apply the yield of the nutrient, such as Nitrogen applications and not
The yield of Nitrogen applications is poor, as the yield response of applied nitrogen.
Technical scheme is as follows:
A kind of shallot nutrient Precision management method, including steps are as follows:
1) determination of shallot yield response coefficient:Yield response of the shallot on the soil of different basic nutrient supply levels
Coefficient is as follows:
2) determination of target output:According to local previous shallot output condition, the target output in plantation plot is determined;
3) determination of yield response:Yield response (t/ha)=yield response coefficient × target output (t/ha);
4) the best amount of nutrients of shallot is obtained according to target output, yield response, agronomy efficiency calculation;
5) fertilizing management method is determined according to soil nutrient Class Of Supply and the best amount of nutrients of shallot.
Preferred according to the present invention, in step 1), the Soil ingenious fertility Class Of Supply is divided into high, normal, basic 3 grades, etc.
Grade is determined according to soil characteristic, organic fertilizer application history:
Soil Nitrogen nutrient supply grade judges as follows according to soil characteristic:
It is low:The loam or clay of sand (not considering soil color) or micro- red/micro- Huang;
In:Grey/brown loam or clay;
It is high:The content of organic matter is high, and is in the loam or clay of black;
The content of organic matter height refers to soil organic matter content>15g/kg;If applying a large amount of organic fertilizer, support
Class Of Supply is divided to mention one level higher;
Soil phophorus, potassium nutrition Class Of Supply are as follows according to nutrient content judgement in soil:
It is low:Low P in soil or K content;
In:Medium P in soil or K content;
It is high:High P in soil or K content;
Phosphorus, the classification of potassium nutrition content are as follows:P<20mg/kg be it is low, during 20~50mg/kg is,>50mg/kg is height;K<
100mg/kg be it is low, during 100~200mg/kg is,>200mg/kg is height;
If soil phophorus, potassium nutrition Class Of Supply are without soil phophorus potassium test result with Soil Nitrogen nutrient supply grade
It is calculated for foundation.
It is above-mentioned to apply a large amount of organic fertilizer and refer to:The poultry manure that every season applies 2t/ha or more reaches 3 years or more.
Calculation basis Shandong Academy of Agricultural Sciences agricultural resource of yield response coefficient of the invention and environment institute, Chinese agriculture
Industry academy of sciences agricultural resource and Research on zoning institute, Institute of Agricultural Scientech Information, BNX, Agriculture In Tianjin money
It is collected into the multiple years test data and open source literature that the units such as source and Environmental Research Institute are carried out throughout the country big
Green onion yield and Nutrient Absorption data, applied regression analysis simulation are established between the main shallot growing area yield in China and Nutrient Absorption
Relationship, calculate analysis nutrient maximum accumulation boundary and maximum dilution boundary, obtain nutrient inherent efficiency and nutrient optimal absorption
Curve finally calculates the yield response coefficient of shallot, establishes nutrient demand amount and nutrient yield response and agronomy efficiency respectively
Relation equation, be by largely many times test accumulation obtain.
Preferred according to the present invention, in step 2), local previous shallot output condition is the soil in abiotic stress
Earth goes over the average product of 3-5, and the target output increases 5-15% on local previous shallot units of production basis.
Highly preferred, the target output increases by 10% on local previous shallot units of production basis.
Preferred according to the present invention, in step 4), the best amount of nutrients of shallot refers to the best npk nutrient demand of shallot.
Preferred according to the present invention, in step 4), nitrogen nutrient dosage is imitated according to the yield response of nitrogen nutrient and nitrogen nutrient agronomy
Rate determines, specific as follows:
Amount of nitrogen (kg N/ha)=nitrogen yield response (t/ha)/nitrogen agronomy efficiency (kg/kg) × 1000;
Wherein, nitrogen yield response (t/ha)=target output (t/ha) × nitrogen yield response coefficient;
Nitrogen agronomy efficiency (kg/kg)=- 0.167 ×【Nitrogen yield response (t/ha)】2+7.9802×【Nitrogen yield response (t/
ha)】-7.0807。
Preferred according to the present invention, in step 4), phosphorus application amount is specific as follows according to maintenance soil phosphorus EQUILIBRIUM CALCULATION FOR PROCESS:
Phosphorus application amount (kg P2O5/ ha)=yield response needs phosphorus amount (kg P2O5/ ha)+basal yield P uptake by plants (kg P2O5/
Ha)-field planting green onion seedling brings phosphorus amount (kg P into2O5/ha);
Wherein, yield response needs phosphorus amount (kg P2O5/ ha)=phosphorus yield response (t/ha) × 0.269 ÷ 0.092 × 2.29;
Phosphorus yield response (t/ha)=target output (t/ha) × phosphorus yield response coefficient.
Basal yield P uptake by plants (kg P2O5/ ha)=【Target output (t/ha)-yield response (t/ha)】×0.269×
2.29。
Field planting green onion seedling brings phosphorus amount (kg P into2O5/ ha)=green onion seedling Weight per plant (g/ plants) × hectare strain number (strain/ha) × 10-6
×0.33×2.29。
Preferred according to the present invention, in step 4), amount of potassium applied is specific as follows according to maintenance soil potassium EQUILIBRIUM CALCULATION FOR PROCESS:
Amount of potassium applied (kg K2O/ha)=yield response needs potassium amount (kg K2O/ha)+basal yield K uptake (kg K2O/
Ha)-field planting green onion seedling brings potassium amount (kg K into2O/ha);
Wherein, yield response needs potassium amount (kg K2O/ha)=potassium yield response (t/ha) × 1.708 ÷ 0.163 ×
1.2046;Potassium yield response (t/ha)=target output (t/ha) × potassium yield response coefficient.
Basal yield K uptake (kg K2O/ha)=【Target output (t/ha)-yield response (t/ha)】×1.708×
1.2046。
Field planting green onion seedling brings potassium amount (kg K into2O/ha)=green onion seedling Weight per plant (g/ plants) × hectare strain number (strain/ha) × 10-6×
1.69×1.2046。
It is preferred according to the present invention, in step 5), determined according to soil nutrient Class Of Supply and the best amount of nutrients of shallot
Fertilizing management method is specific as follows:
(1) according to plantation plot Soil ingenious fertility Class Of Supply, N P and K, which is supported, divides 3-5 application by following;
(2) according to the npk nutrient content of npk nutrient amount and selected fertilizer, the material object of selected fertilizer is calculated
Amount;If application of organic fertilizers, it is no more than total amount of nitrogen 30% according to organic fertilizer amount of nitrogen and controls dosage, be all used as base fertilizer and apply
With if npk nutrient is insufficient in base fertilizer, insufficient section is supplemented by chemical fertilizer nutrient;If npk nutrient is super in base fertilizer
Amount, then excess part when manuring late from proportionally reducing;
(3) method of application of base manure is after holding green onion seedling field planting ditch successfully, and broadcast application bottom of trench is mixed thoroughly with surface soil;Top dressing fertilising
Mode is to plant row 10cm or so trench digging apart from shallot to spread fertilizer over the fields, and is carried out in conjunction with ridging.
Preferred according to the present invention, in above-mentioned (1), point 3 applications are:Late June basal dressing, mid-August chase after for the first time
Fertilizer, second of top dressing mid-September;
Point 4 applications are:Late June basal dressing, early August first time topdressing, second of top dressing of late August, in September under
Ten days third time top dressing;
Point 5 applications are:Late June basal dressing, early August first time topdressing, second of top dressing of mid or late August, in September
The first tenday period of a month third time top dressing, the 4th top dressing of late September.
Advantage of the invention is that:
1, the shallot nutrient requirement characteristics that the present invention is obtained according to shallot digital simulations in all parts of the country a large amount of include in parameter
China extensive shallot working condition information has universal directive significance.
2, the present invention accurately calculates precipitation amount according to shallot target output, and according to working condition to nutrient management side
Method is refined, it can be achieved that the upper nutrient Precision management of shallot production, avoids precipitation and application improper.
3, the present invention is compared with peasant habit fertilising, fertilization compositions based on earth measurement, time saving, laborsaving, strong operability.It is suitble to China
The currently management mode based on smallholder can accomplish to propose special formula for specific plot, more scientific, reasonable.
4, field verification test proves, carries out shallot using the present invention and produces upper nutrient management, improves the yield of shallot
And quality, the income of peasant is increased, has achieved the purpose that increase production and improve productivity.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
Embodiment 1
A kind of shallot nutrient Precision management method, including steps are as follows:
1) determination of shallot yield response coefficient:Yield response of the shallot on the soil of different basic nutrient supply levels
Coefficient is as follows:
Soil ingenious fertility Class Of Supply is divided into high, normal, basic 3 grades, and grade is true according to soil characteristic, organic fertilizer application history
It is fixed.
Soil Nitrogen nutrient supply grade judges as follows according to soil characteristic:
It is low:The loam or clay of sand (not considering soil color) or micro- red/micro- Huang;
In:Grey/brown loam or clay;
It is high:The content of organic matter is high, and is in the loam or clay of black;
The content of organic matter height refers to soil organic matter content>15g/kg;If applying a large amount of organic fertilizer (every season
The poultry manure for applying 2t/ha or more reaches 3 years or more), then nutrient supply grade mentions one level higher;
Soil phophorus, potassium nutrition Class Of Supply are as follows according to nutrient content judgement in soil:
It is low:Low P in soil or K content;
In:Medium P in soil or K content;
It is high:High P in soil or K content;
Phosphorus, the classification of potassium nutrition content are as follows:P<20mg/kg be it is low, during 20~50mg/kg is,>50mg/kg is height;K<
100mg/kg be it is low, during 100~200mg/kg is,>200mg/kg is height;
If soil phophorus, potassium nutrition Class Of Supply are without soil phophorus potassium test result with Soil Nitrogen nutrient supply grade
It is calculated for foundation.
2) determination of target output:According to local previous shallot output condition, the target output in plantation plot is determined;
Local previous shallot output condition is the average product in the soil past 3-5 of abiotic stress, described
Target output increases by 10% on local previous shallot units of production basis.
3) determination of yield response:Yield response (t/ha)=yield response coefficient × target output (t/ha);
4) the best npk nutrient amount of shallot is obtained according to target output, yield response, agronomy efficiency calculation;
Nitrogen nutrient dosage is determined according to the yield response of nitrogen nutrient and nitrogen nutrient agronomy efficiency, specific as follows:
Amount of nitrogen (kg N/ha)=nitrogen yield response (t/ha)/nitrogen agronomy efficiency (kg/kg) × 1000;
Wherein, nitrogen yield response (t/ha)=target output (t/ha) × nitrogen yield response coefficient
Nitrogen agronomy efficiency (kg/kg)=- 0.167 ×【Nitrogen yield response (t/ha)】2+7.9802×【Nitrogen yield response (t/
ha)】-7.0807。
Phosphorus application amount is specific as follows according to maintenance soil phosphorus EQUILIBRIUM CALCULATION FOR PROCESS:
Phosphorus application amount (kg P2O5/ ha)=yield response needs phosphorus amount (kg P2O5/ ha)+basal yield P uptake by plants (kg P2O5/
Ha)-field planting green onion seedling brings phosphorus amount (kg P into2O5/ha);
Wherein, yield response needs phosphorus amount (kg P2O5/ ha)=phosphorus yield response (t/ha) × 0.269 ÷ 0.092 × 2.29;
Phosphorus yield response (t/ha)=target output (t/ha) × phosphorus yield response coefficient.
Basal yield P uptake by plants (kg P2O5/ ha)=【Target output (t/ha)-yield response (t/ha)】×0.269×
2.29。
Field planting green onion seedling brings phosphorus amount (kg P into2O5/ ha)=green onion seedling Weight per plant (g/ plants) × hectare strain number (strain/ha) × 10-6
×0.33×2.29。
Amount of potassium applied is specific as follows according to maintenance soil potassium EQUILIBRIUM CALCULATION FOR PROCESS:
Amount of potassium applied (kg K2O/ha)=yield response needs potassium amount (kg K2O/ha)+basal yield K uptake (kg K2O/
Ha)-field planting green onion seedling brings potassium amount (kg K into2O/ha);
Wherein, yield response needs potassium amount (kg K2O/ha)=potassium yield response (t/ha) × 1.708 ÷ 0.163 ×
1.2046;Potassium yield response (t/ha)=target output (t/ha) × potassium yield response coefficient.
Basal yield K uptake (kg K2O/ha)=【Target output (t/ha)-yield response (t/ha)】×1.708×
1.2046。
Field planting green onion seedling brings potassium amount (kg K into2O/ha)=green onion seedling Weight per plant (g/ plants) × hectare strain number (strain/ha) × 10-6×
1.69×1.2046。
5) fertilizing management method is determined according to soil nutrient Class Of Supply and the best amount of nutrients of shallot.
Experimental example 1:Field experiment verifying
Test in the 6-11 month in 2017 Jinan City, Shandong Province Zhangqiu area jujube garden town carry out, test site be located at Qingyuan village with
Ten thousand Villages.Each test website plot plantation situation is investigated before shallot plantation, target output is determined according to investigation result
With Soil ingenious fertility level of supply grade, 1 shallot nutrient Precision management method (NE) is calculated through the embodiment of the present invention
Yield response and npk nutrient dosage (being shown in Table 1), while local fertilization compositions based on earth measurement (OPTS) and peasant habit (FP) are set
Processing is as control.Totally 3 processing, plot area 100m2More than, repetition is not set, each fertilizer treatment scheme is as shown in table 1 below:
Table 1 NE, OPTS and FP handle fertilizer applications
Compared with peasant habit fertilising and fertilization compositions based on earth measurement scheme, shallot nutrient Precision management method of the invention is comprehensive
Consider the various aspects factors such as soil fertility, crop fertilization residual effect of upper season and target output nutrient demand, for different plot into
Nutrient formula optimization is gone;In terms of average value, reduce 13.9% compared to peasant habit fertilising nitrogen fertilizer amount, Phosphorus Fertilizer Rates are average
It increased, Potassium Fertilizer is almost the same.Shallot nutrient Precision management method of the invention and local soil measurement formula fertilization recommendation
It compares, Potassium Fertilizer is consistent substantially, and nitrogenous fertilizer is slightly reduced, and phosphate fertilizer Potassium Fertilizer increased.
Individually meter is carried out to each processing after shallot harvest and produces measuring and calculating, the results are shown in Table shown in 2:
Table 2 NE, OPTS and FP handle shallot Yield comparison
Shallot nutrient Precision management method processing shallot yield of the invention is 76000~975000kg/ha, and average value is
79167kg/ha;Local soil measurement formula fertilization recommendation processing shallot yield is 59000~92500kg/ha, and average value is
74833kg/ha;Peasant habit fertilizer treatment shallot yield is 56000~860000kg/ha, average value 70833kg/ha.Its
In, shallot nutrient Precision management method processing of the invention shows to apply fertilizer compared with peasant habit on 3 plot and survey soil is matched
The processing of square fertilization recommendation has effect of increasing production, is 11.2% compared to the peasant habit fertilising yield amplification that be averaged;It is pushed away compared to soil measurement formula
Recommend fertilising yield be averaged amplification be 6.0%, effect of increasing production more obviously.
Season fertilizer market sale price is planted according to local shallot and harvest season shallot purchasing price calculates each processing shallot
It plants economic benefit and (presses N=3.7 member/kg, P2O5=3.2 yuan/kg, K2O=5.2 member/kg, shallot=2.0 yuan/kg is calculated, pure
Income=shallot income from sales-fertilizer cost investment), it the results are shown in Table 3.
Table 3 NE, OPTS and FP processing shallot planting benefit compare
Shallot nutrient Precision management method processing net income of the invention is in 12.6~19.2 ten thousand yuan/ha, average out to 15.6
Ten thousand yuan/ha;Local soil measurement formula fertilization recommendation processing net income is in 11.5~18.3 ten thousand yuan/ha, 14.7 ten thousand yuan/ha of average out to;
FP handles net income in 10.9~17.0 ten thousand yuan/ha, average 13.9 ten thousand yuan/ha.Shallot nutrient Precision management method of the invention
It handles opposite peasant habit fertilising and local soil measurement formula fertilization recommendation processing shows revenue growth, it is average respectively to increase income amplitude
For 1.7 ten thousand yuan/ha and 0.8 ten thousand yuan/ha, the effect of increasing income is obvious.
Although above the present invention is described in detail with a general description of the specific embodiments,
On the basis of the present invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Cause
This, these modifications or improvements, fall within the scope of the claimed invention without departing from theon the basis of the spirit of the present invention.
Claims (9)
1. a kind of shallot nutrient Precision management method, including steps are as follows:
1) determination of shallot yield response coefficient:Yield response coefficient of the shallot on the soil of different basic nutrient supply levels
It is as follows:
2) determination of target output:According to local previous shallot output condition, the target output in plantation plot is determined;
3) determination of yield response:Yield response (t/ha)=yield response coefficient × target output (t/ha);
4) the best amount of nutrients of shallot is obtained according to target output, yield response, agronomy efficiency calculation;
5) fertilizing management method is determined according to soil nutrient Class Of Supply and the best amount of nutrients of shallot.
2. shallot nutrient Precision management method according to claim 1, which is characterized in that in step 1), the soil base
Plinth nutrient supply grade is divided into high, normal, basic 3 grades, and grade is determined according to soil characteristic, organic fertilizer application history:
Soil Nitrogen nutrient supply grade judges as follows according to soil characteristic:
It is low:The loam or clay of sand (not considering soil color) or micro- red/micro- Huang;
In:Grey/brown loam or clay;
It is high:The content of organic matter is high, and is in the loam or clay of black;
The content of organic matter height refers to soil organic matter content>15g/kg;If applying a large amount of organic fertilizer, nutrient is supplied
Grade is answered to mention one level higher;
Soil phophorus, potassium nutrition Class Of Supply are as follows according to nutrient content judgement in soil:
It is low:Low P in soil or K content;
In:Medium P in soil or K content;
It is high:High P in soil or K content;
Phosphorus, the classification of potassium nutrition content are as follows:P<20mg/kg be it is low, during 20~50mg/kg is,>50mg/kg is height;K<100mg/
Kg be it is low, during 100~200mg/kg is,>200mg/kg is height;
If without soil phophorus potassium test result, soil phophorus, potassium nutrition Class Of Supply with Soil Nitrogen nutrient supply grade be according to
According to being calculated.
3. shallot nutrient Precision management method according to claim 1, which is characterized in that local previous big in step 2)
Green onion output condition is in the average product of the soil past 3-5 of abiotic stress, and the target output is local previous
Increase 5-15% on shallot units of production basis.
4. shallot nutrient Precision management method according to claim 3, which is characterized in that the target output locality with
Increase by 10% on toward shallot units of production basis.
5. shallot nutrient Precision management method according to claim 1, which is characterized in that in step 4), shallot is most preferably supported
Component refers to the best npk nutrient demand of shallot;Nitrogen nutrient dosage is true according to the yield response of nitrogen nutrient and nitrogen nutrient agronomy efficiency
It is fixed, it is specific as follows:
Amount of nitrogen (kg N/ha)=nitrogen yield response (t/ha)/nitrogen agronomy efficiency (kg/kg) × 1000;
Wherein, nitrogen yield response (t/ha)=target output (t/ha) × nitrogen yield response coefficient
Nitrogen agronomy efficiency (kg/kg)=- 0.167 ×【Nitrogen yield response (t/ha)】2+7.9802×【Nitrogen yield response (t/ha)】-
7.0807。
6. shallot nutrient Precision management method according to claim 1, which is characterized in that in step 4), phosphorus application amount according to
Soil phosphorus EQUILIBRIUM CALCULATION FOR PROCESS is maintained, it is specific as follows:
Phosphorus application amount (kg P2O5/ ha)=yield response needs phosphorus amount (kg P2O5/ ha)+basal yield P uptake by plants (kg P2O5/ha)-
Field planting green onion seedling brings phosphorus amount (kg P into2O5/ha);
Wherein, yield response needs phosphorus amount (kg P2O5/ ha)=phosphorus yield response (t/ha) × 0.269 ÷ 0.092 × 2.29;Phosphorus produces
Quantitative response (t/ha)=target output (t/ha) × phosphorus yield response coefficient
Basal yield P uptake by plants (kg P2O5/ ha)=【Target output (t/ha)-yield response (t/ha)】×0.269×2.29
Field planting green onion seedling brings phosphorus amount (kg P into2O5/ ha)=green onion seedling Weight per plant (g/ plants) × hectare strain number (strain/ha) × 10-6×0.33
×2.29。
7. shallot nutrient Precision management method according to claim 1, which is characterized in that in step 4), amount of potassium applied according to
Soil potassium EQUILIBRIUM CALCULATION FOR PROCESS is maintained, it is specific as follows:
Amount of potassium applied (kg K2O/ha)=yield response needs potassium amount (kg K2O/ha)+basal yield K uptake (kg K2O/ha)-fixed
It plants green onion seedling and brings potassium amount (kg K into2O/ha);
Wherein, yield response needs potassium amount (kg K2O/ha)=potassium yield response (t/ha) × 1.708 ÷ 0.163 × 1.2046;Potassium
Yield response (t/ha)=target output (t/ha) × potassium yield response coefficient
Basal yield K uptake (kg K2O/ha)=【Target output (t/ha)-yield response (t/ha)】×1.708×1.2046
Field planting green onion seedling brings potassium amount (kg K into2O/ha)=green onion seedling Weight per plant (g/ plants) × hectare strain number (strain/ha) × 10-6×1.69
×1.2046。
8. shallot nutrient Precision management method according to claim 1, which is characterized in that in step 5), supported according to soil
Class Of Supply and the best amount of nutrients of shallot is divided to determine that fertilizing management method is specific as follows:
(1) according to plantation plot Soil ingenious fertility Class Of Supply, npk nutrient divides 3-5 application by following;
(2) according to the npk nutrient content of npk nutrient amount and selected fertilizer, the quantity of goods produced of selected fertilizer is calculated;Such as
Fruit application of organic fertilizers is no more than total amount of nitrogen 30% according to organic fertilizer amount of nitrogen and controls dosage, is all used as base fertilizer application, if
Npk nutrient is insufficient in base fertilizer, then insufficient section is supplemented by chemical fertilizer nutrient;If npk nutrient excess in base fertilizer, excess
Part when manuring late from proportionally reducing;
(3) method of application of base manure is after holding green onion seedling field planting ditch successfully, and broadcast application bottom of trench is mixed thoroughly with surface soil;Top dressing fertilization mode
It spreads fertilizer over the fields to plant row 10cm or so trench digging apart from shallot, is carried out in conjunction with ridging.
9. shallot nutrient Precision management method according to claim 8, which is characterized in that point 3 applications are:Late June
Basal dressing, mid-August first time topdressing, second of top dressing mid-September;
Point 4 applications are:Late June basal dressing, early August first time topdressing, second of top dressing of late August, mid or late September
Top dressing three times;
Point 5 applications are:Late June basal dressing, early August first time topdressing, second of top dressing of mid or late August, early or mid September
Third time top dressing, the 4th top dressing of late September.
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