Potash fertilizer application method for reducing Cd content of leaf vegetables in acid vegetable field

An application method and technology of potassium fertilizer, applied in the directions of fertilization method, botanical equipment and method, application, etc., can solve the problems of unbalanced soil fertility, insufficient potassium supply capacity, and deterioration of soil properties in vegetable fields, and achieve low-cost, enhanced Ability, Ease of Implementation

Active Publication Date: 2012-12-26
INST OF AGRI RESOURCES & ENVIRONMENT GUANGDONG ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the southern region, due to the continuous improvement of the multiple cropping index, the potassium content of the soil is obviously low, the potassium supply capacity is insufficient, and the crop's demand for potassium has increased significantly, and the application of potassium fertilizer has become more and more important; The phenomenon of partial application of potassium fertilizer and underestimation of potassium fertilizer makes the soil fertility of the vegetable field unbalanced, soil properties deteriorate, and even bring ecological and environmental problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The test was carried out in the net room of the Soil and Fertilizer Research Institute of Guangdong Academy of Agricultural Sciences in October 2008. The pH of the tested soil was 5.13 and the Cd content was 0.60 mg·kg -1 , planting lettuce, choose potassium sulfate (containing K 2 O 50%), potassium dihydrogen phosphate (contains K 2 O 34%) and potassium chloride (60%), the total application of K 2 The amount of O is 9 kg / mu.

[0036] Four treatments were set up in the test, potassium sulfate + potassium dihydrogen phosphate, potassium chloride + potassium dihydrogen phosphate, potassium sulfate alone, and potassium chloride alone.

[0037] The same amount of calcium dihydrogen phosphate (2.9 kg P 2 o 5 / mu) and urea (10 kg N / mu), in which urea is sprayed four times according to the ratio of 20%, 25%, 25%, and 30%, and the interval between each spraying is 10 days, and calcium dihydrogen phosphate is used as the base fertilizer once Sexual infusion.

[0038] Weigh...

Embodiment 2

[0043] This test was carried out in March 2009 at pH=6.13, Cd content was 1.34 mg·kg -1 Vegetable field, plant mustard greens, choose potassium sulfate (containing K 2 O 50%), potassium dihydrogen phosphate (contains K 2 O 34%) and potassium chloride (60%), the total application of K 2 The amount of O is 7 kg / mu.

[0044] Three treatments were set up in the experiment, potassium sulfate + potassium dihydrogen phosphate, potassium chloride + potassium dihydrogen phosphate, and potassium sulfate alone.

[0045] An equal amount of calcium dihydrogen phosphate (3.4 kg P 2 o 5 / mu) and urea (10 kg N / mu), in which urea was sprayed four times according to the ratio of 20%, 25%, 25%, and 30%, with an interval of 7 days between each spraying, and calcium dihydrogen phosphate was used as the base fertilizer once Sexual infusion.

[0046] Weigh 1.4 K respectively 2 Potassium sulfate and potassium chloride of O / mu are spread before sowing mustard and mixed evenly with the soil.

...

Embodiment 3

[0050] In this test, pH=5.68 and Cd content of 0.87 mg·kg in the suburb of Dongguan City -1 Carried out in the vegetable field, plant sunflower black leafy cabbage (a low Cd accumulation leafy vegetable variety) and red amaranth (a high Cd enrichment variety), potassium sulfate (containing K 2 O 50%), potassium dihydrogen phosphate (contains K 2 O 34%) and potassium chloride (60%), apply K 2 The amount of O is 6 kg / mu.

[0051] Two treatments were set up in the experiment: potassium sulfate + potassium dihydrogen phosphate, potassium chloride + potassium dihydrogen phosphate.

[0052] An equal amount of calcium dihydrogen phosphate (3.4 kg P 2 o 5 / mu) and urea (10 kg N / mu), the urea was sprayed four times according to the ratio of 20%, 25%, 25% and 30%. Every 5 days between showers, calcium dihydrogen phosphate was applied as a base fertilizer at one time.

[0053] Weigh 1.2 K respectively 2 Potassium sulfate and potassium chloride of O / mu should be applied before sowi...

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PUM

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Abstract

The invention discloses a potash fertilizer application method for reducing Cd content of leaf vegetables in an acid vegetable field, which comprises the following steps of: in the acid vegetable field, applying 1-2kg of potash fertilizer serving as a base fertilizer per mu; on the third to the fifth day after seedlings of the leaf vegetables are established, applying 2-4kg of potash fertilizer in a spraying mode, and on the tenth to the fifteenth, applying 2-4kg of potash fertilizer in a spraying mode; and after the seedlings of the leaf vegetables are established, applying solution of monopotassium phosphate to leaf surfaces at intervals of 5-7 days in a spraying mode. Due to the adoption of the potash fertilizer application method, the Cd content of the upper parts of the leaf vegetables can be obviously reduced, so that the quality of the vegetables is promoted. Meanwhile, due to the adoption of the method disclosed by the invention, the soil quality can also be improved.

Description

technical field [0001] The invention relates to a chemical fertilizer application method, in particular to a potassium fertilizer application method for reducing the Cd content of acid vegetable field leafy vegetables. Background technique [0002] Vegetables contain a variety of minerals, vitamins and dietary fiber, which are of very important or even irreplaceable value to maintaining normal physiological functions of the human body and improving health. They play a very important role in people's daily life and human health. The demand for vegetables and Consumption is increasing day by day, and its quality has also attracted the attention of consumers. However, due to the unreasonable discharge of industrial "three wastes", unreasonable use of agricultural chemical inputs, and vehicle exhaust emissions, the vegetable soil is polluted by the heavy metal cadmium (Cd) to varying degrees, resulting in an increase in the Cd content of vegetables, especially vegetables. The p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01C21/00A01G1/00
Inventor 艾绍英王艳红李盟军唐明灯曾招兵杨少海姚建武罗英健
Owner INST OF AGRI RESOURCES & ENVIRONMENT GUANGDONG ACADEMY OF AGRI SCI
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