Method of judging fertilizing amount by utilizing citrus leaf nutrients

A technology of fertilization amount and leaves, applied in fertilization methods, fertilization devices, applications, etc., can solve the problems of missing and no citrus leaf nutrition diagnosis standards, and achieve the effects of increasing yield per mu, reducing blindness of fertilization, and improving accuracy

Inactive Publication Date: 2019-07-26
SICHUAN AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for judging the amount of fertilization by using the nutrients of citrus leaves. This method solves the problem that there is no nutrient diagnosis standar

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for judging the amount of fertilization using citrus leaf nutrients, the method comprising:

[0026] (1) Selection of sample trees: On September 10, set 4 sample plots of 20m×20m in a citrus garden to be tested, and select trees with healthy growth and good vigor in each sample plot according to the "S"-shaped route. , 5 sample trees with complete canopy and no pests and diseases as sampling trees, a total of 20 sampling trees were selected;

[0027] (2) Leaf picking method: in the middle part of the canopy periphery, select the 3rd leaf on the top of the slightly vegetative branches of the year's spring vegetative branches that grow robustly, the quality of the vegetative spring shoots is the key to flowering and fruit setting in the next year, adopt The nutritional diagnosis of the vegetative spring shoot leaves in the current year can better reflect the nutritional status of the tree. According to the investigation of the nutrient status of the tree in the c...

Embodiment 2

[0034] (1) sample tree is selected:: on September 20, all the other are with embodiment 1;

[0035] (2) leaf picking method: with embodiment 1;

[0036] (3) Indoor leaf sample processing: with embodiment 1;

[0037] (4) Digestion of leaf sample powder: Weigh 0.35g of leaf sample powder, add 5mL of concentrated sulfuric acid in a digestion tube, let it stand for 10h, add 2mL of hydrogen peroxide, place it on a digestion furnace at 300°C, and then add 10 drops of hydrogen peroxide every 30min, Add 4 times until the cooking liquid is clear, then heat for 30 minutes, after natural cooling, set the volume to 50mL, and transfer it to a plastic bottle for later use;

[0038] (5) Determination of leaf sample elements: Assay method is the same as Example 1, measured results: N is 2.55%, P is 0.14%, K is 1.25%, P / N is 0.055, and K / N is 0.490;

[0039] (6) Nutritional diagnosis index standard: with embodiment 1;

[0040] (7) Judgment of measurement results: According to the measuremen...

Embodiment 3

[0042] (1) sample tree is selected: on September 28, all the other are with embodiment 1;

[0043] (2) leaf picking method: with embodiment 1;

[0044] (3) Indoor leaf sample processing: with embodiment 1;

[0045] (4) Digestion of leaf sample powder: Weigh 0.40g of leaf sample powder, add 5mL of concentrated sulfuric acid in a digestion tube, let it stand for 10h, add 2mL of hydrogen peroxide, put it on a digestion furnace at 300°C, and then add 10 drops of hydrogen peroxide every 30min, Add 4 times until the cooking liquid is clear, then heat for 30 minutes, after natural cooling, set the volume to 50mL, and transfer it to a plastic bottle for later use;

[0046](5) leaf sample element determination: determination method is the same as embodiment 1, measured result: N is 2.95%, P is 0.10%, K is 1.30%, P / N is 0.034, and K / N is 0.441;

[0047] (6) Nutritional diagnosis index standard: with embodiment 1;

[0048] (7) Judgment of measurement results: According to the measurem...

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PUM

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Abstract

The invention discloses a method of judging fertilizing amount by utilizing citrus leaf nutrients. The method comprises the following steps: 1, setting a plurality of sample plots in a citrus garden plot to be tested; 2, selecting leaves on the top of spring vegetative shoots of a current year and mixing the leaves into a leaf sample; 3, removing dirt and petioles, carrying out enzyme deactivationunder the condition of 100 DEG C, and placing in a constant temperature oven with the temperature of 75 DEG C for baking for 24 hours; 4, crushing and sieving the sample, adding concentrated sulfuricacid and hydrogen peroxide, and carrying out boiling elimination at 300 DEG C; 5, measuring N by adopting kjeldahl determination, measuring P by adopting a molybdenum-antimony anti-colorimetric method, and measuring K by adopting an atomic absorption method; if N is 2.40-2.70%, P is 0.12-0.16%, K is 1.00-1.40%, P/N is 0.050-0.059, and K/N is 0.416-0.519, a citrus tree is balanced in nutrition. The method of judging fertilizing amount by utilizing the citrus leaf nutrients can judge deficiency of nutritive elements and balance conditions of the various nutrients, and reduce adverse effects ofblind fertilization on soil.

Description

technical field [0001] The invention relates to a method for judging the amount of fertilization of citrus, in particular to a method for judging the amount of fertilization by using the nutrients of citrus leaves. Background technique [0002] Citrus is an evergreen small tree or shrub belonging to Rutaceae citrus. It is the world's largest fruit category and the world's third largest traded agricultural product. It is mainly concentrated in Asia, and its planting area accounts for 53% of the world's total citrus planting area. [0003] The production technology level of citrus in my country is still relatively low, the average yield per unit area has not yet reached the world average level, the quality varies, and the industry is still in the state of "big but not strong". There are many factors that affect the yield and quality of citrus, but one of the most critical factors is low fertilization level, low fertilizer utilization rate, low tree nutrition level and imbalanc...

Claims

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Application Information

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IPC IPC(8): A01C21/00
CPCA01C21/007
Inventor 丁春邦冯士令陈涛刘静周莉君黄燕廖进秋袁明杨瑞武
Owner SICHUAN AGRI UNIV
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