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A method for predicting nitrogen absorption of fertilizers in season by famous and high-quality green tea spring tea

A nitrogen absorption and fertilizer technology is applied in the field of predicting the nitrogen absorption of famous green tea spring tea to the fertilizer of the season, which can solve the problems of no prediction absorption method and limited absorption information, and achieve the effect of improving utilization efficiency and increasing economic benefits.

Active Publication Date: 2020-11-24
TEA RES INST CHINESE ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] There is very limited information on nitrogen uptake by dormant subtropical evergreen broad-leaved plants under low temperature conditions in winter. In tea, there is currently no way to predict the uptake of nitrogen by new shoots in spring.

Method used

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  • A method for predicting nitrogen absorption of fertilizers in season by famous and high-quality green tea spring tea
  • A method for predicting nitrogen absorption of fertilizers in season by famous and high-quality green tea spring tea
  • A method for predicting nitrogen absorption of fertilizers in season by famous and high-quality green tea spring tea

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Example 1: Determining the relationship between the absorption of fertilizer nitrogen and the effective accumulated temperature of the soil in the shoots of spring tea

[0030] Install a soil thermometer to measure the soil temperature in the tea garden soil, measure the temperature at a depth of 20cm, collect the effective accumulated temperature of soil at different thresholds, and compare the effective accumulated temperature of soil with different thresholds with N dff Comparative analysis of the regression equation of the regression equation, determine the correlation coefficient R between the variables in the regression equation sample at 8°C 2 The highest, standard deviation is the smallest, more suitable for the present invention, see Table 1.

[0031] Table 1 Cumulative spring tea N in each picking period dff Comparative analysis of % and different threshold soil effective accumulated temperature regression equation

[0032]

[0033] The effective accumula...

Embodiment 2

[0041] Example 2: Method for Predicting the Absorption of Seasonal Fertilizer Nitrogen by Famous Green Tea Spring Tea

[0042] (1) Assuming that the germination fertilizer is applied on February 2, and the active accumulated temperature of the soil is greater than 8°C during the period from the end of the batch of spring tea picking in late March to 91°C, press "N dff_(A) =-20.092+0.717*T-0.004T 2 "Calculated to get the total amount of spring tea N dff = 12.72%, the variation range of the four measured values ​​in the actual field is 10.8% to 14.3%, and the average is 12.75%.

[0043] Then, according to fertilizer nitrogen, spring tea nitrogen content, output, according to "fertilizer nitrogen absorption (g) = accumulative spring tea output (dry weight, kg) * spring tea nitrogen concentration (g / kg) * N dff / 100” to calculate the absorption of fertilizer nitrogen:

[0044] The nitrogen concentration of spring tea measured during this period was 49.8g / kg, and the cumulative ...

Embodiment 3

[0048] Embodiment 3: According to "N dff_(A)=-20.092+0.717*T-0.004T 2 "It is estimated that spring tea is suitable for topdressing.

[0049] When the nitrogen absorption of the first batch of spring tea fertilizers reaches the maximum range, the soil active accumulated temperature will take about 72-90 degrees. Assuming that the perennial picking period in a certain place is March 25-30, the active accumulated temperature of the tea garden soil temperature is greater than 8 degrees before picking. The forward date of 72-90 degree days is about February 5-10, so this period is a suitable period for topdressing.

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Abstract

The invention provides a method for predicating the absorption of spring tea of famous green tea on fertilizer nitrogen in season and belongs to the technical field of tea tree nutrients. The method comprises the following steps: mounting a soil thermometer for measuring the temperature of soil in the soil of a tea garden; calculating the effective accumulated temperature T from a fertilization day to a picking day when the soil temperature of the tea garden is greater than or equal to 8 DEG C; comparing with the effective accumulated temperature of the soil of the tea garden and correspondingto the following formula to predicate an absorption condition of new shoots of tea leaves on the fertilizer nitrogen; and calculating the absorption amount of the fertilizer nitrogen according to thenitrogen content of the fertilizer nitrogen and the spring tea and the yield of the spring tea. The method provided by the invention can guide tea farmers to grasp the application time of spring germination accelerating fertilizer according to the local soil temperature changes over the years, so that fertilized additional fertilizer is utilized by the spring tea at maximum; and the method has anobvious promotion effect on the improvement of early, good and high performance of the spring tea, the improvement of the utilization efficiency of topdressing nitrogen fertilizer of the spring tea and the increment of the economic benefits of the tea farmers.

Description

technical field [0001] The invention belongs to the technical field of tea tree nutrition, and in particular relates to a method for predicting the nitrogen absorption of famous and high-quality green tea spring tea to seasonal fertilizers. Background technique [0002] Tea is an important economic crop in southern my country, especially playing an important role in getting rid of poverty and becoming rich. As of 2017, my country's tea garden area is 3 million hectares, and the output value of dry raw tea is 200 billion yuan. [0003] The tea production season is generally from March to September, and has obvious seasonality, which can be divided into spring tea, summer tea and autumn tea. [0004] The quality of green tea depends on the picking standards and production season. The tea in spring has the best quality and the highest price. From the perspective of market demand, spring tea should first be picked "early", second, the quality should be "good", and third, the y...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01C21/00
CPCA01C21/007
Inventor 阮建云马立锋伊晓云石元值方丽张群峰倪康刘美雅
Owner TEA RES INST CHINESE ACAD OF AGRI SCI