CN109479481A - A method of prediction famous green tea spring tea absorbs this season fertilizer nitrogen - Google Patents
A method of prediction famous green tea spring tea absorbs this season fertilizer nitrogen Download PDFInfo
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Abstract
A method of prediction famous green tea spring tea absorbs this season fertilizer nitrogen, belongs to tea tree nutrition technique field.It includes the following steps: the soil temperature meter of the installation measurement soil moisture in tea garden soil；Calculate effective accumulated temperature T when fertilising day to picking day tea garden soil temperature >=8 DEG C；Compare tea garden soil effective accumulated temperature, corresponding following formula, absorbing state of the prediction tealeaves young sprout to fertilizer nitrogen；According to fertilizer nitrogen, spring tea nitrogen content and spring tea yield, the uptake of fertilizer nitrogen is calculated.Tea grower can be instructed to be changed according to the local soil moisture over the years using method of the invention, get hold of the administration time of spring vernalization fertilizer, the top dressing for making application is used in spring tea to greatest extent, this for improve spring tea " morning ", " good ", "high", spring tea top dressing fertilizer utilization efficiency is improved, the economic benefit for increasing tea grower has apparent facilitation.
Description
Technical field
The invention belongs to tea tree nutrition technique fields, and in particular to a kind of prediction famous green tea spring tea inhales this season fertilizer nitrogen
The method of receipts.
Background technique
Tealeaves is a kind of Important Economic crop of south China, is especially played an important role on shaking off poverty and setting out on the road to prosperity.It arrives
Until 2017,3,000,000 hectares of China tea place area, 200,000,000,000 yuan of the dry gross tea output value.
Tea Production season has apparent seasonality generally in September in March-, can be divided into spring tea, summer tea, autumn tea.
And the quality of green tea depends on standard of plucking and production season, the tea leaf quality in spring is optimal, price highest.From city
Demand from the point of view of, spring tea first is that plucking time wants " morning ", second is that quality will " good ", third is that yield wants "high".
" morning " is embodied in that people is unselfish to be had, and price is naturally high.
" good " is embodied in standard of plucking, best with the quality of 2 Ye Chuzhan of 1 bud, 1 leaf or 1 bud, abundant due to containing in tealeaves
Free amino acid, tea polyphenols or catechin content are reasonable, therefore the ratio of tea polyphenols and total amino acid is lower, therefore early morning tea product
Matter is best.
"high" is embodied in yield, and tealeaves can be harvested repeatedly.
Therefore, to accomplish " morning ", " good ", "high" of spring tea, very crucial, quality of the fertilizer especially nitrogenous fertilizer to tealeaves of applying fertilizer
With being affected for yield, in order to improve absorption and utilization efficiency of the tea tree to nutrient, the supply of nutrient and tea tree are to nutrient
Absorption must synchronize, and also need consistent with climatic environments such as weather conditions.
The administration time of spring vernalization fertilizer is extremely important, and fertilization time, weather condition, tea tree phenological period three must integrate
Consider.
Plant is directly bullied the influence of mild soil temperature to the absorption of nutrient, and the variation of temperature influences root system to Nutrient Absorption energy
Power.In temperature lower early spring, the growth of bud-leaf is largely dependent upon redistributing for reserves nitrogen, while root system absorbs
It is considered seldom.
Suspend mode subtropical evergreen broad leaved plant is very limited to the absorption information of nitrogen under cryogenic conditions in winter, in tealeaves
In, it there is no prediction spring tealeaves young sprout to the absorption process of this season top dressing nitrogen at present.We pass through studies have shown that in early spring winter Mo
Under the low soil moisture, absorption root is transported to overground part still to Nitrogen Absorption, has significant tribute to the growth of spring in next year young sprout
It offers.
Summary of the invention
In view of the problems of the existing technology, it is an object of the invention to design to provide a kind of prediction famous green tea spring tea pair
The technical solution for the method that this season fertilizer nitrogen absorbs.
The method that a kind of prediction famous green tea spring tea absorbs this season fertilizer nitrogen, it is characterised in that including walking as follows
It is rapid:
(1) the soil temperature meter of the measurement soil moisture is installed in tea garden soil；
(2) effective accumulated temperature T when fertilising day to picking day tea garden soil temperature >=8 DEG C is calculated；
(3) tea garden soil effective accumulated temperature, corresponding following formula, absorbing state of the prediction tealeaves young sprout to fertilizer nitrogen are compareed；
A) exploitation to the accumulative fertilizer nitrogen of late March picking Famous High-quality Tea green tea accounts for the full nitrogen ratio of tealeaves, according to equation calculation:
Ndff_(A)=-20.092+0.717*T-0.004T2, coefficient of determination R2=0.981, predict error se=0.646；
B) exploitation to the accumulative fertilizer nitrogen of early April Famous High-quality Tea green tea accounts for the full nitrogen ratio of tealeaves, according to equation calculation:
Ndff_(B)=-42.523+0.995*T-0.004T2, coefficient of determination R2=0.996, predict error se=0.31；
C) spring tea amounts to fertilizer nitrogen and accounts for the full nitrogen ratio of tealeaves, according to equation calculation:
Ndff_(C)=-140.241+1.522T-0.004T2, coefficient of determination R2=0.957, predict error se=0.838；
(4) according to fertilizer nitrogen, spring tea nitrogen content and spring tea yield, the uptake of fertilizer nitrogen is calculated according to following formula:
Fertilizer nitrogen absorbing amount (g)=accumulative spring tea yield (dry weight, kg) * spring tea Different Nitrogen Concentration (g/kg) * Ndff/100。
The method that a kind of prediction famous green tea spring tea absorbs this season fertilizer nitrogen, it is characterised in that the step
1) soil temperature meter is mounted on soil 20cm depth in.
It is had a significant impact the study result show that the applied nitrogen time absorbs fertilizer nitrogen to young sprout.Fertilising compared with
Early, fertilizer nitrogen is usually higher in young sprout.Each time of picking, young sprout to the inhalation effects of fertilizer nitrogen can with fertilizing time with adopt
Soil (20cm depth) effective accumulated temperature plucked between period carries out quadratic equation fitting.
Therefore, tea grower can be instructed to be changed according to the local soil moisture over the years using method of the invention, gets hold of spring
The administration time of vernalization fertilizer, makes the top dressing of application be to greatest extent used in spring tea, this for improve " morning " of spring tea, " good ",
"high", improves spring tea top dressing fertilizer utilization efficiency, and the economic benefit for increasing tea grower has apparent facilitation.
Detailed description of the invention
Fig. 1 is the relationship of different picking batch spring tea fertilizer nitrogen proportions and soil active accumulated temperature.
Specific embodiment
Further illustrate the present invention with reference to embodiments.
Embodiment 1: the relationship of the absorption of fertilizer nitrogen and soil effective accumulated temperature in spring tea young sprout is determined
The soil temperature meter of the installation measurement soil moisture, measures the temperature of soil 20cm depth, acquisition is not in tea garden soil
With threshold value soil effective accumulated temperature, and pass through different threshold value soil effective accumulated temperature and NdffRegression equation comparative analysis, determine 8 DEG C
When regression equation sample in coefficient R between variable2Highest, standard deviation are minimum, are more suitable for the present invention, are shown in Table 1.
Each collecting period of table 1 adds up spring tea Ndff% and different threshold value soil effective accumulated temperature regression equation comparative analysis
Spring tea is picked to exploitation to late March, exploits to early April and picks fertilising day to the March that spring tea and spring tea amount to
Effective accumulated temperature T when the last ten-days period or early April picking day tea garden soil temperature >=8 DEG C is with tealeaves young sprout to the assimilation ratio of fertilizer nitrogen
Quadratic equation fitting is carried out, wherein Tealeaves young sprout is obtained to the assimilation ratio of fertilizer nitrogen and the line of effective accumulated temperature T
Property equation, as shown in Figure 1.
A) exploitation to the accumulative fertilizer nitrogen of late March Famous High-quality Tea green tea accounts for the full nitrogen ratio of tealeaves, according to equation calculation:
Ndff_(A)=-20.092+0.717*T-0.004T2, coefficient of determination R2=0.981, predict error se=0.646；
B) exploitation to the accumulative meter fertilizer nitrogen of early April Famous High-quality Tea green tea accounts for the full nitrogen ratio of tealeaves, according to equation calculation:
Ndff_(B)=-42.523+0.995*T-0.004T2, coefficient of determination R2=0.996, predict error se=0.31；
C) spring tea amounts to fertilizer nitrogen and accounts for the full nitrogen ratio of tealeaves, according to equation calculation:
Ndff_(C)=-140.241+1.522T-0.004T2, coefficient of determination R2=0.957, predict error se=0.838；
Finally according to fertilizer nitrogen absorbing amount (g)=accumulative spring tea yield (dry weight, kg) * spring tea Different Nitrogen Concentration (g/kg) *
Ndff/ 100, determine fertilizer nitrogen absorbing amount.
Embodiment 2: the method that prediction famous green tea spring tea absorbs this season fertilizer nitrogen
(1) to apply vernalization fertilizer by 2 days 2 months, until soil is greater than 8 DEG C of activity between the late March batch spring tea picking Close Date
Accumulated temperature is 91 degree, presses " Ndff_(A)=-20.092+0.717*T-0.004T2" spring tea total N is calculateddff=12.72%, it is real
The measured value variation range of border field four times is 10.8%~14.3%, average out to 12.75%.
Then, according to fertilizer nitrogen, spring tea nitrogen content, yield, according to " fertilizer nitrogen absorbing amount (g)=accumulative spring tea yield
(dry weight, kg) * spring tea Different Nitrogen Concentration (g/kg) * Ndff/ 100 " calculate the uptake of fertilizer nitrogen:
The spring tea nitrogen concentration measured during this is 49.8g/kg, and it is 1.4kg/ that the spring tea yield picked, which adds up (dry weight),
Mu substitutes into formula, obtains fertilizer nitrogen absorbing amount (g)=1.4*49.8*12.75/100=8.89g.
(2) vernalization fertilizer was applied with 17 days 2 months, the active accumulated temperature to soil between the spring tea Close Date greater than 8 DEG C is 176.5 degree,
By " Ndff_(C)=-140.241+1.522T-0.004T2" calculate tealeaves in fertilizer nitrogen account for the full nitrogen ratio of tealeaves obtain spring tea total
Ndff=11.7%.Field three times practical measurement numerical value be 11.9%~12.7%, average out to 11.6%.
Then, according to fertilizer nitrogen, spring tea nitrogen content, yield, according to " fertilizer nitrogen absorbing amount (g)=spring tea yield is (dry
Weight, kg) * spring tea Different Nitrogen Concentration (g/kg) * Ndff/ 100 " calculate the uptake of fertilizer nitrogen:
The spring tea average nitrogen concentration measured is 47.4g/kg, and the spring tea yield (dry weight) picked is 18kg/ mus, is substituted into public
Formula obtains fertilizer nitrogen absorbing amount (g)=18*47.4*11.6/100=99.0g.
Embodiment 3: according to " Ndff_(A)=-20.092+0.717*T-0.004T2" calculate that spring tea is suitable for dressing time.
The soil active accumulated temperature that first spring tea fertilizer nitrogen absorbs when reaching maximum magnitude about needs 72-90 degree day, it is assumed that certain
The long-term time of picking in ground is 25-30 in March days, and active accumulated temperature of the tea garden soil temperature greater than 8 degree reaches 72-90 degree day before picking
The date that is pushed forward be about -10 days on the 5th 2 months, then this period be suitable for dressing time.
Claims (2)
1. a kind of method that prediction famous green tea spring tea absorbs this season fertilizer nitrogen, it is characterised in that include the following steps:
(1) the soil temperature meter of the measurement soil moisture is installed in tea garden soil；
(2) effective accumulated temperature T when fertilising day to picking day tea garden soil temperature >=8 DEG C is calculated；
Ti >=8 DEG C are separated by number of days between n=fertilising day and picking day
(3) tea garden soil effective accumulated temperature, corresponding following formula, absorbing state of the prediction tealeaves young sprout to fertilizer nitrogen are compareed；
A) exploitation to the accumulative fertilizer nitrogen of late March Famous High-quality Tea green tea accounts for the full nitrogen ratio of tealeaves, according to equation calculation: Ndff_(A)=-
20.092+0.717*T-0.004T2, coefficient of determination R2=0.981, predict error se=0.646；
B) exploitation to the accumulative fertilizer nitrogen of early April Famous High-quality Tea green tea accounts for the full nitrogen ratio of tealeaves, according to equation calculation:
Ndff_(B)=-42.523+0.995*T-0.004T2, coefficient of determination R2=0.996, predict error se=0.31；
C) spring tea amounts to fertilizer nitrogen and accounts for the full nitrogen ratio of tealeaves, according to equation calculation:
Ndff_(C)=-140.241+1.522T-0.004T2, coefficient of determination R2=0.957, predict error se=0.838；
(4) according to fertilizer nitrogen, spring tea nitrogen content and spring tea yield, the uptake of fertilizer nitrogen: fertilizer is calculated according to following formula
Nitrogen absorbing amount (g)=accumulative spring tea yield (dry weight, kg) * spring tea Different Nitrogen Concentration (g/kg) * Ndff/100。
2. a kind of method that prediction famous green tea spring tea absorbs this season fertilizer nitrogen as described in claim 1, it is characterised in that
Soil temperature meter is mounted on soil 20cm depth in the step 1).
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| CN114402779A (en) * | 2022-01-11 | 2022-04-29 | 同济大学 | Citrus variable soil testing and formulated fertilization method for increasing organic fertilizer application and reducing chemical fertilizer |
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| CN114402779A (en) * | 2022-01-11 | 2022-04-29 | 同济大学 | Citrus variable soil testing and formulated fertilization method for increasing organic fertilizer application and reducing chemical fertilizer |
| CN114402779B (en) * | 2022-01-11 | 2022-10-25 | 同济大学 | Citrus variable soil testing and formulated fertilization method for increasing organic fertilizer application and reducing chemical fertilizer |
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