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Recommended fertilizing method of nitrogen fertilizer in tea garden

A technology for recommending fertilization and tea gardens, which is applied in the field of recommended fertilization of nitrogen fertilizers in tea gardens. It can solve problems such as adverse environmental impacts, enhance the greenhouse effect, and intensify nitrogen oxide gas emissions, and achieve strong timeliness, improve nitrogen fertilizer use efficiency, and reduce impact effects

Inactive Publication Date: 2019-01-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the excessive application of nitrogen fertilizer will increase the emission of nitrogen oxide gas, enhance the greenhouse effect, and have adverse effects on the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A planted Longjing tea garden last year produced 3000kg / ha of spring tea green tea, and the known yield response is 400kg / ha, so this year's target yield = 3000*1.3 = 3900kg / ha. According to the relationship between yield response and agronomic efficiency: y=-3E-06x 2 + 0.0049x-0.013 (y is the agronomic efficiency kg / kg, x is the yield response kg / ha) and the agronomic efficiency is 1.467kg / kg, according to the formula: nitrogen application rate (FN, kg N / ha) = yield response ( kg / ha) / agronomic efficiency (kg / kg), the recommended nitrogen application rate for this tea garden is 273kg / ha. Apply nitrogen fertilizer according to the ratio of base fertilizer: spring topdressing: summer topdressing = 3:4:3, and finally the yield of spring tea greens is 3692kg / ha.

Embodiment 2

[0018] The output of last year’s spring tea in a planted moss tea garden was 2500kg / ha, and the yield response was unknown, but the soil test was done before, and the test results were: organic matter 12.5g / kg, total nitrogen 0.85g / kg, available phosphorus 6.3mg / ha kg, available potassium is 89mg / kg. According to the critical value index of nitrogen, phosphorus and potassium in the soil test, it can be determined that the soil fertility level of the tea garden belongs to the middle level, and the yield response coefficient corresponding to the middle level soil fertility is 0.17. According to the formula: target yield = farmers can obtain yield * 1.3, the target yield for this year is 2500*1.3=3250kg / ha. Yield response = target yield * yield response coefficient = 3250*0.17 = 552.5kg / ha. According to the relationship between yield response and agronomic efficiency: y=-3E-06x 2 +0.0049x-0.013 (y is the agronomic efficiency kg / kg, x is the yield response kg / ha) to obtain an ag...

Embodiment 3

[0020] A spring tea planted in Fuding Dabai tea garden last year produced 2000kg / ha of green tea. The yield response is unknown and there is no soil test. By observing the surface properties of the tea garden soil, the soil texture of the tea garden is loamy, and the soil color is gray. According to the estimation of the soil nutrient supply level, it can be determined that the soil nutrient level of the tea garden is medium, and the yield response coefficient corresponding to the medium soil fertility is 0.17. According to the formula: target yield = yield available to farmers * 1.3, the target yield for this year is 2000 * 1.3 = 2600 kg / ha. Yield response = target yield * yield response coefficient = 2600*0.17 = 442kg / ha. According to the relationship between yield response and agronomic efficiency: y=-3E-06x 2 +0.0049x-0.013 (y is the agronomic efficiency kg / kg, x is the yield response kg / ha) and the agronomic efficiency is 1.567kg / kg, according to the formula: nitrogen ap...

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Abstract

The invention provides a recommended fertilizing method of a nitrogen fertilizer in a tea garden, including the steps of: (1) according to the harvested fresh tea leaves of spring tea of farmers in previous years, determining a target yield; (2) according to fertility grade of soil of the tea garden and the target yield, determining nitrogen yield reaction of the tea garden; (3) according to the relationship between the yield reaction and agricultural efficiency, determining the agricultural efficiency by means of the known yield reaction; (4) according to the known yield reaction and agricultural efficiency, calculating the application amount of the nitrogen in the tea garden. In the method, optimum nutrient absorption is analyzed through a model; besides consideration on nutrient supplement from the soil, nutrients from other sources except the soil are considered too, e.g. the nutrients from settlement, irrigation and the like environmental factors; so that the method has great timeliness and is available no matter soil test conditions exist or not. The method fully considers the nutrient supplement from the soil in the tea garden, can recommend application quantity of the nitrogen fertilizer to farmers more reasonably, can increase the utilization rate of the nitrogen fertilizer and reduce influence on environment due to same, and is suitable for the basic situation in agriculture mainly with small farms in our country.

Description

technical field [0001] The invention belongs to the technical field of scientific fertilization, and in particular relates to a method for recommending fertilization of nitrogen fertilizer in tea gardens. Background technique [0002] Nitrogen is an essential macronutrient element for tea growth and one of the main components of chlorophyll. Appropriate nitrogen fertilizer application is conducive to the improvement of tea yield and quality. Tea is an important economic crop in my country, with high output value. Farmers often put a lot of fertilizer into tea gardens in order to obtain higher yields. This phenomenon of excessive fertilization is more serious in the economically developed southeast coastal areas. Due to the excessive fertilization of tea gardens, especially the excessive application of nitrogen fertilizers, nitrogen fertilizers in tea gardens enter rivers, lakes, groundwater and other water bodies through leaching, seepage and runoff, resulting in eutrophicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01C21/00A01G17/00
CPCA01C21/005A01C21/007A01G17/005
Inventor 吴良欢汤胜
Owner ZHEJIANG UNIV