CN113481016A - Soil conditioner and preparation method and application thereof - Google Patents
Soil conditioner and preparation method and application thereof Download PDFInfo
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- CN113481016A CN113481016A CN202110860853.2A CN202110860853A CN113481016A CN 113481016 A CN113481016 A CN 113481016A CN 202110860853 A CN202110860853 A CN 202110860853A CN 113481016 A CN113481016 A CN 113481016A
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- 239000003516 soil conditioner Substances 0.000 title claims abstract description 75
- 238000002360 preparation method Methods 0.000 title abstract description 16
- 241000207199 Citrus Species 0.000 claims abstract description 40
- 235000020971 citrus fruits Nutrition 0.000 claims abstract description 38
- 235000003891 ferrous sulphate Nutrition 0.000 claims abstract description 33
- 239000011790 ferrous sulphate Substances 0.000 claims abstract description 33
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims abstract description 32
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims abstract description 32
- BEJNERDRQOWKJM-UHFFFAOYSA-N kojic acid Chemical compound OCC1=CC(=O)C(O)=CO1 BEJNERDRQOWKJM-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229960004705 kojic acid Drugs 0.000 claims abstract description 30
- WZNJWVWKTVETCG-UHFFFAOYSA-N kojic acid Natural products OC(=O)C(N)CN1C=CC(=O)C(O)=C1 WZNJWVWKTVETCG-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000002689 soil Substances 0.000 claims abstract description 24
- 241000196324 Embryophyta Species 0.000 claims abstract description 22
- 239000007864 aqueous solution Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000011010 flushing procedure Methods 0.000 claims abstract description 9
- 241001478315 Candidatus Liberibacter asiaticus Species 0.000 claims abstract description 6
- 230000001737 promoting effect Effects 0.000 claims abstract description 6
- 230000002262 irrigation Effects 0.000 claims abstract description 5
- 238000003973 irrigation Methods 0.000 claims abstract description 5
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 17
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 16
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 40
- 235000013399 edible fruits Nutrition 0.000 abstract description 23
- 229910052742 iron Inorganic materials 0.000 abstract description 22
- 238000004383 yellowing Methods 0.000 abstract description 15
- 238000012937 correction Methods 0.000 abstract description 9
- 230000002950 deficient Effects 0.000 abstract description 6
- 229930002875 chlorophyll Natural products 0.000 abstract description 4
- 235000019804 chlorophyll Nutrition 0.000 abstract description 4
- ATNHDLDRLWWWCB-AENOIHSZSA-M chlorophyll a Chemical compound C1([C@@H](C(=O)OC)C(=O)C2=C3C)=C2N2C3=CC(C(CC)=C3C)=[N+]4C3=CC3=C(C=C)C(C)=C5N3[Mg-2]42[N+]2=C1[C@@H](CCC(=O)OC\C=C(/C)CCC[C@H](C)CCC[C@H](C)CCCC(C)C)[C@H](C)C2=C5 ATNHDLDRLWWWCB-AENOIHSZSA-M 0.000 abstract description 4
- -1 iron ions Chemical class 0.000 abstract description 4
- 230000027772 skotomorphogenesis Effects 0.000 abstract description 4
- 230000001502 supplementing effect Effects 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 230000003750 conditioning effect Effects 0.000 abstract description 2
- 229960001781 ferrous sulfate Drugs 0.000 description 28
- 230000000052 comparative effect Effects 0.000 description 16
- 229960001484 edetic acid Drugs 0.000 description 14
- 230000000694 effects Effects 0.000 description 11
- 238000012360 testing method Methods 0.000 description 4
- 206010022971 Iron Deficiencies Diseases 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000003963 antioxidant agent Substances 0.000 description 3
- 230000003078 antioxidant effect Effects 0.000 description 3
- 239000008139 complexing agent Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229940001474 sodium thiosulfate Drugs 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D9/00—Other inorganic fertilisers
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D9/00—Other inorganic fertilisers
- C05D9/02—Other inorganic fertilisers containing trace elements
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2101/00—Agricultural use
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Soil Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Pest Control & Pesticides (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention belongs to the technical field of fruit tree yellowing correction, and provides a soil conditioner and a preparation method and application thereof. The soil conditioner comprises the following components in parts by weight: 50-150 parts of kojic acid and 250 parts of ferrous sulfate. The soil conditioner can be used for supplementing iron elements to iron-deficient etiolated plants, has a wide application range, is particularly suitable for alkaline soil, promotes the plants to absorb iron ions, and further efficiently promotes etiolated leaves to re-green. The application of the soil conditioner in promoting the greening of citrus etiolation leaves comprises adding 100 times of water into the soil conditioner to prepare an aqueous solution, and then carrying out flushing application on citrus roots; or the soil conditioner is mixed with soil and buried for irrigation and water permeation. Through adopting the soil conditioning agent that this application provided and the specific operation of using, can increase the chlorophyll of the old blade of lack of iron, and can make the young shoot blade resume normal, the fruit tree can continue to emerge from the young shoot.
Description
Technical Field
The invention belongs to the technical field of fruit tree yellowing correction, and particularly relates to a soil conditioner and a preparation method and application thereof.
Background
Some soil in main citrus producing areas such as Sichuan, Yunnan, Guangxi and the like is weakly alkaline, such as mountainous areas with more limestone. The iron-deficiency yellowing of citrus trees caused by alkaline land is very serious. Some fruit growers who do not know the technology often cut these iron-deficient yellowed trees directly as the yellow dragon diseased trees, which is very costly for agricultural planting.
At present, the commonly adopted method for correcting etiolated leaves is to spray chelated iron on the leaves to achieve the purpose of iron supplement. The chelated iron needs to be sprayed at least four times a month, and in the middle of a year, the chelated iron needs to be continuously sprayed during the growing season. The method has high cost, treats both symptoms and root causes, and is difficult to continuously popularize. In some places, iron is supplemented by spreading ferrous sulfate on the roots of plants. However, the direct application of ferrous sulphate to the roots of the plants is less effective in the case of alkaline soils.
Therefore, how to correct citrus etiolation leaves efficiently and at low cost becomes a problem to be solved at present.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, a first object of the present invention is to provide a soil conditioner; the soil conditioner can be used for supplementing iron elements to iron-deficient etiolated plants, has a wide application range, is particularly suitable for alkaline soil, promotes the plants to absorb iron ions, and further efficiently promotes etiolated leaves to re-green.
In view of the above-mentioned deficiencies in the prior art, a second object of the present invention is to provide a use of a soil conditioner for promoting greening of citrus etiolated leaves; through adopting the soil conditioning agent that this application provided and the concrete operation that adopts when using, can increase the chlorophyll of the old blade of lack of iron, and can make the young shoot blade resume normal, the fruit tree can continue to emerge from young shoots.
In order to achieve the above purpose, the solution adopted by the invention is as follows:
a soil conditioner comprises the following components in parts by weight: 50-150 parts of kojic acid and 250 parts of ferrous sulfate.
Further, in a preferred embodiment of the present invention, the composition further comprises, in parts by weight: 3-10 parts of EDTA and 3-8 parts of sodium thiosulfate.
Further, in the preferred embodiment of the present invention, 100 parts by weight of kojic acid, 250 parts by weight of ferrous sulfate, 6 parts by weight of EDTA and 6 parts by weight of sodium thiosulfate are used.
A preparation method of the soil conditioner comprises the following steps: according to the parts by weight, kojic acid, ferrous sulfate, EDTA and sodium thiosulfate are stirred and mixed for 3-5min at the rotation speed of 150-200 r/min.
An application of the soil conditioner in promoting greening of citrus etiolation leaves comprises adding 100 times of water into the soil conditioner to prepare an aqueous solution, and then performing flushing application on citrus roots; or the soil conditioner is mixed with soil and buried for irrigation and water permeation.
Further, in a preferred embodiment of the invention, the aqueous solution is flushed to the citrus roots in an amount of 306g to 418g soil conditioner/plant when the citrus soil has a pH of 5.5 to 7.5.
Further, in a preferred embodiment of the present invention, when the citrus plant soil has a pH of greater than 7.5 and equal to or less than 9.0, the citrus plant soil is flushed to a pH of less than or equal to 7.5 after adding 300 times as much water to 25% sulfuric acid before flushing the aqueous solution.
Further, in the preferred embodiment of the present invention, the citrus root is flushed twice, each time in half of the aqueous solution, with 15 days between each other.
The soil conditioner and the preparation method and the application thereof provided by the invention have the beneficial effects that:
(1) the soil conditioner provided by the invention combines kojic acid and ferrous sulfate in a certain proportion range, and the inventors unexpectedly find that the kojic acid can greatly promote the absorption of plants to iron and the plant yellowing leaves can be efficiently and thoroughly corrected when the kojic acid and the ferrous sulfate are used for correcting the plant yellowing leaf greening.
(2) The soil conditioner provided by the invention can also increase the stability of the system by adding the complexing agent and the antioxidant, and avoid the instability of kojic acid in the system to iron ions, thereby further improving the effect of greening etiolated leaves and the yield of young shoots.
(3) By adopting the soil conditioner and the specific application method thereof, chlorophyll of iron-deficient old leaves can be increased, the young leaves can be recovered to be normal, and the fruit trees can continue to emerge from young shoots.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
The embodiment provides a preparation method of a soil conditioner, which comprises the following steps: and stirring and mixing 250g of ferrous sulfate and 50g of kojic acid for 4min at the speed of 180r/min to obtain the soil conditioner.
Example 2
The embodiment provides a preparation method of a soil conditioner, which comprises the following steps: and stirring and mixing 250g of ferrous sulfate and 150g of kojic acid for 4min at the speed of 180r/min to obtain the soil conditioner.
Example 3
The embodiment provides a preparation method of a soil conditioner, which comprises the following steps: and stirring and mixing 250g of ferrous sulfate and 100g of kojic acid for 4min at the speed of 180r/min to obtain the soil conditioner.
Example 4
The embodiment provides a preparation method of a soil conditioner, which comprises the following steps: 250g of ferrous sulfate, 50g of kojic acid, 3g of EDTA and 3g of sodium thiosulfate are stirred and mixed for 4min at a speed of 180r/min to obtain the soil conditioner.
Example 5
The embodiment provides a preparation method of a soil conditioner, which comprises the following steps: 250g of ferrous sulfate, 150g of kojic acid, 10g of EDTA and 8g of sodium thiosulfate are stirred and mixed for 4min at the speed of 180r/min to obtain the soil conditioner.
Example 6
The embodiment provides a preparation method of a soil conditioner, which comprises the following steps: 250g of ferrous sulfate, 100g of kojic acid, 6g of EDTA and 6g of sodium thiosulfate are stirred and mixed for 4min at the speed of 180r/min to obtain the soil conditioner.
Example 7
The embodiment provides a preparation method of a soil conditioner, which comprises the following steps: 250g of ferrous sulfate, 100g of kojic acid, 6g of EDTA and 6g of sodium thiosulfate are stirred and mixed for 5min at the speed of 150r/min to obtain the soil conditioner.
Example 8
The embodiment provides a preparation method of a soil conditioner, which comprises the following steps: 250g of ferrous sulfate, 100g of kojic acid, 6g of EDTA and 6g of sodium thiosulfate are stirred and mixed for 3min at a speed of 200r/min to obtain the soil conditioner.
Comparative example 1
The present comparative example provides a method of preparing a soil conditioner, comprising: and stirring and mixing 250g of ferrous sulfate and 45g of kojic acid for 4min at the speed of 180r/min to obtain the soil conditioner.
Comparative example 2
The present comparative example provides a method of preparing a soil conditioner, comprising: and stirring and mixing 250g of ferrous sulfate and 155g of kojic acid for 4min at the speed of 180r/min to obtain the soil conditioner.
Comparative example 3
The present comparative example provides a method of preparing a soil conditioner, comprising: stirring and mixing 250g of ferrous sulfate, 45g of kojic acid, 2 parts of EDTA (ethylene diamine tetraacetic acid) and 2 parts of sodium thiosulfate at 180r/min for 4min to obtain the soil conditioner.
Comparative example 4
The present comparative example provides a method of preparing a soil conditioner, comprising: stirring and mixing 250g of ferrous sulfate, 155g of kojic acid, 11 parts of EDTA and 9 parts of sodium thiosulfate at 180r/min for 4min to obtain the soil conditioner.
Comparative example 5
The present comparative example provides a method of preparing a soil conditioner, comprising: 250g of ferrous sulfate, 100g of kojic acid, 6g of EDTA and 6g of sodium thiosulfate are stirred and mixed for 6min at a speed of 140r/min to obtain the soil conditioner.
Comparative example 6
The present comparative example provides a method of preparing a soil conditioner, comprising: 250g of ferrous sulfate, 100g of kojic acid, 6g of EDTA and 6g of sodium thiosulfate are stirred and mixed for 2min at a speed of 210r/min to obtain the soil conditioner.
Experimental example 1
The experimental method comprises the following steps:
selecting a certain citrus test garden with iron deficiency and yellowing phenomenon, and randomly taking 10 soil positions to measure the pH value of the soil to be 5.5-7.5; 85 adult citrus trees which are more than 2 years old after yellowing in the test garden are selected and divided into 17 groups, and 5 adult citrus trees in each group.
Experimental groups 1-14 are experimental groups: adding 100 times of water by weight into the soil conditioner prepared in the examples 1-8 and the comparative examples 1-6 respectively to obtain water solutions; the aqueous solutions of examples 1 to 8 and comparative examples 1 to 6 were applied by irrigation to the roots of each of the etiolated citrus trees of experimental groups 1 to 14 (at 300g to 418g soil conditioner/plant), respectively; the citrus root is flushed twice, the dosage of each time is one half of the aqueous solution, and the interval time is 15 days.
Experimental group 15 is a control group: adding 300g of ferrous sulfate into 100 times of water by weight to obtain a ferrous sulfate aqueous solution; the ferrous sulfate aqueous solution was applied to the roots of each yellowed citrus tree (per 300g soil conditioner/plant) in experimental group 15; the citrus root is flushed twice, the dosage of each time is one half of the aqueous solution, and the interval time is 15 days.
Experimental group 16 is a blank group.
Experimental group 17: adding the soil conditioner prepared in the example 6 into water with the weight 100 times of the soil conditioner to obtain water solutions; the aqueous solution of example 6 was applied to the roots of each of the yellowed citrus trees of experimental group 17 (362 g soil conditioner/plant); the preparation is applied by one-time irrigation.
After 2 months, the orange trees of the experimental groups 1-17 are observed to turn green, and the fruit trees grow new shoots, and the results are shown in the table 1:
TABLE 1
| Serial number | Yellow trees/plants | Turning green/plant | Emergence of new shoots |
| 1 | 5 | 5 | 5 yellow trees all have new shoots, and the average shoot output of each fruit tree is 2 |
| 2 | 5 | 5 | 5 yellow trees all have new shoots, and the average shoot output of each fruit tree is 2 |
| 3 | 5 | 5 | 5 yellow trees all have new shoots, and the average shoot output of each fruit tree is 2 |
| 4 | 5 | 5 | 5 yellow trees all have new shoots, and the average shoot output of each fruit tree is 3 |
| 5 | 5 | 5 | 5 yellow trees all have new shoots, and the average shoot output of each fruit tree is 3 |
| 6 | 5 | 5 | 5 yellow trees all have new shoots, and the average shoot output of each fruit tree is 4 |
| 7 | 5 | 5 | 5 yellow trees all have new shoots, and the average shoot output of each fruit tree is 4 |
| 8 | 5 | 5 | 5 yellow trees all have new shoots, and the average shoot output of each fruit tree is 4 |
| 9 | 5 | 3 | Without young shoot |
| 10 | 5 | 3 | Without young shoot |
| 11 | 5 | 4 | 1 yellow tree shoots are formed, and the shoot yield is 2 |
| 12 | 5 | 4 | 2 etiolated trees grow new shoots, and the average shoot yield of each fruit tree is 1 |
| 13 | 5 | 4 | 4 yellow trees grow new shoots, and the average shoot yield of each fruit tree is 1 |
| 14 | 5 | 4 | 4 yellow trees grow new shoots, and the average shoot yield of each fruit tree is 1 |
| 15 | 5 | 2 | Without young shoot |
| 16 | 5 | 0 | Without young shoot |
| 17 | 5 | 4 | 4 yellow trees all have new shoots, and the average shoot output of each fruit tree is 2 |
As can be seen from the data in table 1, the soil conditioner provided in example 1 (experimental group 1) of the present application has a better correction effect on citrus yellowing and greening than that obtained by directly using an equivalent amount of ferrous sulfate aqueous solution (experimental group 15), which indicates that kojic acid has an effect of promoting absorption of iron by citrus.
Compared with the examples 1 to 3 (experimental groups 1 to 3), the soil conditioner prepared in the examples 4 to 6 (experimental groups 4 to 6) has good greening effect and higher young sprout yield due to the addition of the complexing agent and the antioxidant, and the addition of the complexing agent and the antioxidant has a promoting effect on the correction of the yellowing and greening of the citrus.
In comparative examples 1 to 2 (experimental groups 9 to 10), the ratio of the amount of kojic acid to the amount of ferrous sulfate is lower or higher than that in examples 1 to 3, the correction effect of yellowing and greening is poor, and no new shoots exist, which indicates that the ratio of the amount of kojic acid to the amount of ferrous sulfate has an important influence on the correction effect of yellowing and greening of citrus.
In comparative examples 3 to 4 (experimental groups 11 to 12), the ratio of the amount of kojic acid to the amount of ferrous sulfate is lower or higher than that in examples 1 to 5, the correction effect of the greening treatment is slightly poor, and the amount of new tips is less, which indicates that the amount of kojic acid, ferrous sulfate, EDTA and sodium thiosulfate has an important influence on the correction effect of the greening treatment of citrus.
The experiment group 17 adopts one-time flushing application, and compared with the experiment group 6, the yellowing and greening effect is poor, which shows that the application of flushing application to citrus trees twice is more favorable for the correction effect of the yellowing and greening of citrus.
Experimental example 2
Randomly selecting 10 soil positions from a certain citrus test garden with iron deficiency and yellowing phenomena to measure that the pH value of the soil is 7.5-9.0 (excluding 7.5); 10 adult citrus trees which are more than 2 years after yellowing in a test garden are selected and divided into 2 groups, and 5 adult citrus trees in each group.
Experimental group 1: adding 300 times of water into 25% sulfuric acid, then flushing and applying the soil of the citrus trees to be corrected until the pH is less than or equal to 7.5, and respectively adding 100 times of water into the soil conditioner prepared in the embodiment 6 to obtain water solutions; the aqueous solution of example 6 was applied to the roots of each of the yellowed citrus trees of experimental group 1 (362 g soil conditioner/plant); the citrus root is flushed twice, the dosage of each time is one half of the aqueous solution, and the interval time is 15 days.
Experimental group 2: adding the soil conditioner prepared in the example 6 into water with the weight 100 times of the soil conditioner to obtain water solutions; the aqueous solution of example 6 was applied to the roots of each of the yellowed citrus trees of experimental group 1 (362 g soil conditioner/plant); the citrus root is flushed twice, the dosage of each time is one half of the aqueous solution, and the interval time is 15 days.
After 2 months, the orange trees of the experimental groups 1-16 are observed to turn green, and the fruit trees grow new shoots, and the results are shown in the table 2:
TABLE 2
| Serial number | Yellow trees/plants | Turning green/plant | Emergence of new shoots |
| 1 | 5 | 5 | 5 yellow trees all have new shoots, and the average shoot output of each fruit tree is 4 |
| 2 | 5 | 3 | 1 yellow trees all have new shoots, and the average shoot output of each fruit tree is 2 |
The results in table 2 show that, in the present application, when the pH of the yellowed citrus field soil is greater than 7.5 and less than or equal to 9.0, the citrus field soil is flushed with 300 times of water after adding 25% sulfuric acid to the citrus field soil until the pH is less than or equal to 7.5, and then the aqueous solution is flushed, so that a good greening effect can be obtained.
In conclusion, the soil conditioner provided by the invention and the preparation method and the application thereof are adopted. The soil conditioner can be used for supplementing iron elements to iron-deficient etiolated plants, has a wide application range, is particularly suitable for alkaline soil, and can promote the absorption of the plants on iron ions, so that etiolated leaves are promoted to be greenish efficiently. By adopting the soil conditioner and the specific method for applying the soil conditioner in correcting etiolation and regreening, chlorophyll of iron-deficient old leaves can be increased, the young leaves can be recovered to be normal, and the fruit trees can continue to emerge from young shoots.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A soil conditioner characterized by: comprises the following components in parts by weight: 50-150 parts of kojic acid and 250 parts of ferrous sulfate.
2. The soil conditioner of claim 1, wherein: the composition also comprises the following components in parts by weight: 3-10 parts of EDTA and 3-8 parts of sodium thiosulfate.
3. The soil conditioner of claim 2, wherein: the composition comprises, by weight, 100 parts of kojic acid, 250 parts of ferrous sulfate, 6 parts of EDTA and 6 parts of sodium thiosulfate.
4. A method for preparing a soil conditioner according to any one of claims 1 to 3, wherein: the method comprises the following steps: and according to the weight parts, stirring and mixing the kojic acid, the ferrous sulfate, the EDTA and the sodium thiosulfate at the rotation speed of 150-200r/min for 3-5 min.
5. Use of a soil conditioner according to any one of claims 1 to 3 for promoting the greening of citrus etiolated leaves, wherein: adding 100 times of water by weight into the soil conditioner to prepare an aqueous solution, and then carrying out flushing application on the citrus roots; or the soil conditioner is mixed with soil and buried for irrigation and water permeation.
6. Use according to claim 5, characterized in that: and when the pH value of the soil of the citrus field is 5.5-7.5, flushing the water solution to the root of the citrus according to 300g-418g of the soil conditioner/plant.
7. Use according to claim 6, characterized in that: when the pH value of the citrus field soil is more than 7.5 and less than or equal to 9.0, before the aqueous solution is applied, the citrus field soil is applied by adding 300 times of water into 25 percent sulfuric acid until the pH value is less than or equal to 7.5.
8. Use according to claim 7, characterized in that: and carrying out flushing application on the citrus roots in two times, wherein the dosage of each time is one half of the aqueous solution, and the interval time is 15 days.
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Citations (10)
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