CN101779565B - Production method for lowering cadmium content in Sauropus androgynus product - Google Patents
Production method for lowering cadmium content in Sauropus androgynus product Download PDFInfo
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- CN101779565B CN101779565B CN2010101209529A CN201010120952A CN101779565B CN 101779565 B CN101779565 B CN 101779565B CN 2010101209529 A CN2010101209529 A CN 2010101209529A CN 201010120952 A CN201010120952 A CN 201010120952A CN 101779565 B CN101779565 B CN 101779565B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
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Abstract
The invention relates to a production method for lowering cadmium content in a Sauropus androgynus product. After soil is leveled and is in deep ploughing, the PH value of the soil is determined and then adjusted; after a ridge is ploughed, base fertilizer is applied; Sauropus androgynus is planted after covering surface soil and is irrigated and watered at regular time; when tender tips grow on the plant, a tender tip of which the length is 12 cm is picked to obtain the Sauropus androgynus product with low cadmium content; the base fertilizer is formed by mixing fermented high-protein organic fertilizer, superphosphate and ant ash or by mixing fermented high-protein organic fertilizer, superphosphate and lemery salt. The invention has simple operation method, effectively fixes cadmium ions in soil by regulating the PH value of soil and applying high-protein organic fertilizer, reduces the possibility that the root of the Sauropus androgynus adsorbs cadmium ions from oil so as to effectively control cadmium content in the Sauropus androgynus while ensuring yield. The produced Sauropus androgynus product has stable and safe quality, can be applied on small-area or large-scale production cultivation and has strong operability.
Description
Technical field
The invention belongs to the plant cultivation field, specifically is a kind of production method that reduces cadmium content in the Sauropus androgynus product.
Background technology
Set young dish (Sauropus androgynus) formal name used at school house lizard wood, have another name called Wuzhi Mountain edible wild herbs, day green perfume (or spice) etc., belong to Euphorbiaceae, perennial undershrub plant.Originate in the torrid areas, Southeast Asia, all have wild on China Hainan, Guangdong, Guangxi, Fujian, Yunnan and other places and cultivation, its tender tip of all plucking among the people is a vegetable edible.
Set young dish and have higher nutritive value, rich in proteins, multivitamin and several mineral materials, wherein protein and vitamin C are more than 20 times of common vegetable, carotin and vitamin B2 content are more than 10 times of common vegetable.In addition, set young dish through frying (or boiling) food, the mouthfeel delicacy is clear and melodious, and delicious flavour is unique.
The nineties in last century; The industry of setting young dish obtains fast development; In Guangdong, all there is larger area production in Hainan, Guangxi, wherein only Hainan cultivated area just surpasses 30,000 mu, yet; Set young dish in 2005 by the problem that refers to exist heavy metal cadmium content to exceed standard; Though carry out sampling Detection through authoritative test center to setting young dish sample thereafter, data show, set in the young dish cadmium content and surpass national standard (annotate: pollutant national standard (GB2762-2005) the regulation leaf vegetables limit standard value of limiting the quantity of is in the food: 0.2mgkg
-1, pollution-free vegetable product quality national standard (GB18406.1-2001) value is :≤0.05mgkg
-1), still met with heavy losses but set young dish industry.
Because cadmium is the heavy metal element that is harmful to; Mainly combine after being absorbed by the body, form metal hydrosulfide albumen, optionally be stored in liver,kidney,spleen, pancreas, thyroid gland, suprarenal gland and testis with blood with the low relative molecular mass plasma protein that contains sulfydryl; And the property accumulated is very strong; Long-term absorption of human body or excessive Absorbed Cadmium can cause Itai-itai diseases, and in addition, medical research in recent years shows; Cadmium element can produce a series of chronic lesion to human body, like hypertension, damage of testis, carcinogenesis, teratogenesis, anaemia, osteoporosis or the like.
Therefore, set cadmium content index in the young dish and become the key technical index of estimating the Sauropus androgynus product quality.The planting patterns of the young dish of tree all adopts traditional growing vegetables mode at present, also not relevant breeding method and the relevant report of utilizing planting patterns to reduce cadmium content in the young dish of tree.
Summary of the invention
The purpose of this invention is to provide a kind of production method that reduces cadmium content in the Sauropus androgynus product; PH value through regulating the plantation soil reduces the cadmium content of setting the tender tip of young dish effectively with enforcement base manure; The Sauropus androgynus product quality safety of being produced is stable, has stronger operability.
The know-why that the present invention adopted:
(1) through analysis of experiments, the content of the young dish cadmium of the high more tree of P in soil H value is just low more, main because, cadmium forms insoluble cadmium hydroxide compound under alkali condition, this compound can not be absorbed by plant, so must at first regulate the pH value of soil when producing.Result of the test shows that it is comparatively desirable between 6.70-7.30 to regulate PH.
(2) cadmium of tree in the young dish mainly is that root system absorbs from soil and gets; Cadmium ion in the soil can combine with sulphion and form insoluble cadmium sulfide compound, and this compound can not be absorbed by the young dish of tree, therefore; When plantation, use the higher fertilizer of protein content as base manure; The sulphide that produces after protein decomposes combines with the cadmium ion in the soil, and is fixed, and sets the absorptive amount of young dish to cadmium thereby reduced.
(3) the young dish of tree imposes fertilizer in necessary for growth, and to satisfy the required nutrient of its growth, commercially available fertilizer quality is very different; Bring new pollution easily; Therefore be unfavorable for quality control, use the organic or inorganic liquid fertilizer of cadmium content National standard to spray and topdress, be beneficial to service property (quality) control agriculture input; Help simultaneously uniform of application and balance fertilizing again, satisfy the young dish of the tree needs of growth fast.
(4) through analytical test, the result shows: the cadmium ion of setting in the young dish mainly concentrates in the aging plant tissue (aging leaf and stem), and the content of tender more tender tip cadmium is just low more, and according to analysis of experiments, the length of plucking the tender tip is controlled to be 12 centimetres and is advisable with interior.
The technical scheme that the present invention adopted:
A kind of production method that reduces cadmium content in the Sauropus androgynus product is that P in soil H value is measured in land readjustment, deep ploughing back, regulates then between pH value to 6.70～7.30; Implement base manure after playing furrow, cover the back plantation of table soil, regularly irrigate and water; Treat that plant grows to 50～70 centimetres, can pluck 12 centimetres tender point when growing the tender tip, cadmium low content Sauropus androgynus product.Said base manure is that the high-protein organic fertilizer that ferments, superphosphate and ash are mixed; Maybe the high-protein organic fertilizer that ferments, superphosphate and potassium sulphate are mixed; Usage amount is every mu of soil: 20 kilograms～50 kilograms of 2000 kilograms～3000 kilograms of high-protein organic fertilizer, 50 kilograms～double centner of superphosphate, ash double centner～150 kilogram, potassium sulphates.Said high-protein organic fertilizer is that fish guano, peanut cake fertilizer or soya-bean cake are fertile.
Whenever gather and just spray cadmium content after 1 time-2 times to meet the organic or inorganic liquid of national product standard fertile.
The assay method of said P in soil H value is colorimetric method or acidometer method.
Detect and analyze:
1, the different mensuration results that pluck length compare
On the vegetable plot of the same young dish of tree, pluck 10 centimetres, 12 centimetres, 15 centimetres, 18 centimetres, the tender tip of the young dish of the tree of 20 centimeter length respectively at random; Be gathered into 5 duplicate samples, making beating is handled the back and is measured cadmium content in this 5 duplicate samples respectively with GFAAS.Select 3 ground to do experiment altogether.Result of the test shows (seeing table 1): pluck length below 12 centimetres the time, it is minimum to set young dish cadmium content.
Different result of the test/the mgKg that pluck length of table 1
-1
| Sequence number | Cadmium content (10 centimetres) | Cadmium content (12 centimetres) | Cadmium content (15 centimetres) | Cadmium content (18 centimetres) | Cadmium content (20 centimetres) |
| 1# ground | 0.032 | 0.041 | 0.069 | 0.092 | 0.091 |
| 2# ground | 0.028 | 0.039 | 0.077 | 0.086 | 0.11 |
| 3# ground | 0.036 | 0.045 | 0.072 | 0.088 | 0.13 |
2, P in soil H value is to setting the influence of young dish cadmium content
On different plot, cities and counties such as Wuzhishan City, Hainan Province, Qiong Zhong county, Bao Ting county, gather 21 parts of young dish samples of tree respectively, take to set the pairing soil specimen of young dish sample simultaneously.With the pH value of acidometer method mensuration soil, measure the content of cadmium in the young dish sample of tree with GFAAS.Result of the test shows (seeing table 2): set young dish cadmium content and P in soil H and be the negative relation; Correlation coefficient is-0.9193; P in soil H value is between 6.70-7.30 the time; It is minimum to set in the young dish cadmium content, has reached the standard-required (0.05mg/kg) of pollution-free vegetable, confirms that therefore pH value 6.70-7.30 is an optimum range.
Table 2 P in soil H value and the cadmium content of setting young dish sample
3, the comparative test result of this method and conventional method
(home environment term harmonization) put out two in order experimental field same ground, and plot is by the inventive method production (processing), and plot is by produced in conventional processes (contrast) in addition; Treat that plant grows to about 60 centimetres; When growing the tender tip, pluck sample simultaneously and carry out the analytical test first time, the every harvesting again at a distance from 10 days tested; Measure altogether 6 times, the result shows (seeing 3): the young dish cadmium content of the tree that this method is produced is starkly lower than conventional method.
Comparative test result/the mgkg of two kinds of methods of table 3
-1
| Sequence number | Cadmium content (processing) | Cadmium content (contrast) |
| 1 | 0.044 | 0.095 |
| 2 | 0.035 | 0.10 |
| 3 | 0.040 | 0.097 |
| 4 | 0.022 | 0.087 |
| 5 | 0.036 | 0.13 |
| 6 | 0.049 | 0.11 |
| Mean value | 0.038 | 0.10 |
Method of operating of the present invention is simple; PH value through regulating soil with apply high-protein organic fertilizer and effectively the cadmium ion in the soil fixed; Avoid setting young dish root system Absorbed Cadmium ion from soil, thereby when guaranteeing output, controlled the content of setting cadmium in the young dish effectively, the Sauropus androgynus product quality safety of being produced is stable; Can carry out small size or large-scale production cultivation and all can use, have stronger operability.
Embodiment
Below in conjunction with embodiment the present invention is described further.
Embodiment one
The laggard row in plantation soil is smooth choosing, and deep ploughs about 30 centimetres, adopts colorimetric method for determining P in soil H simultaneously, and regulating pH value is 6.90.Play 100 centimetres of wide furrow; Furrow width is 30 centimetres between furrow and the furrow; 70 kilograms of 2300 kilograms in peanut cake fertilizer, the superphosphate, the ash that ferment by every mu of usefulness then mix the back for 120 kilograms and apply as base manure; Cover table soil back plantation (25 centimetres of seeding row spacing 15 cm x), the plantation back is regularly irrigated and is watered; Planted back about 60 days, plant grows to about 60 centimetres, can gather when growing the tender tip, plucks 12 centimetres tender point, tie into wisp, sell goods.Whenever gather and just spray cadmium content after 1 time-2 times to meet the organic or inorganic liquid of national product standard fertile.
Embodiment two
The laggard row in plantation soil is smooth choosing, and deep ploughs about 30 centimetres, adopts the acidometer method to measure P in soil H simultaneously, and regulating pH value is 7.10.Play 100 centimetres of wide furrow; Furrow width is 30 centimetres between furrow and the furrow; Fertile 2700 kilograms of the soya-bean cake, 90 kilograms of superphosphate, the potassium sulphate that ferment by every mu of usefulness then mix the back for 30 kilograms and apply as base manure, cover table soil back plantation (25 centimetres of seeding row spacing 15 cm x), and the plantation back is regularly irrigated and watered; Planted back about 60 days, plant grows to about 60 centimetres, can gather when growing the tender tip, plucks 12 centimetres tender point, tie into wisp, sell goods.Whenever gather and just spray cadmium content after 1 time-2 times to meet the organic or inorganic liquid of national product standard fertile.
The production base bigger to planting scale, draw samples detects sample with GFAAS before plucking, and cadmium content reaches the standard-required rear and plucks list marketing.
Claims (3)
1. a production method that reduces cadmium content in the Sauropus androgynus product is characterized in that P in soil H value is measured in land readjustment, deep ploughing back, regulates then between pH value to 6.70～7.30; Implement base manure after playing furrow, cover the back plantation of table soil, regularly irrigate and water; Treat that plant grows to 50～70 centimetres, can pluck 12 centimetres tender point when growing the tender tip, cadmium low content Sauropus androgynus product; Said base manure is that the high-protein organic fertilizer that ferments, superphosphate and ash are mixed; Maybe the high-protein organic fertilizer that ferments, superphosphate and potassium sulphate are mixed; Usage amount is every mu of soil: 20 kilograms～50 kilograms of 2000 kilograms～3000 kilograms of high-protein organic fertilizer, 50 kilograms～double centner of superphosphate, ash double centner～150 kilogram, potassium sulphates; Said high-protein organic fertilizer is that fish guano, peanut cake fertilizer or soya-bean cake are fertile.
2. the production method of cadmium content in the reduction Sauropus androgynus product according to claim 1 is characterized in that: the assay method of said P in soil H value is colorimetric method or acidometer method.
3. the production method of cadmium content in the reduction Sauropus androgynus product according to claim 1 is characterized in that: whenever gathering just sprays cadmium content after 1 time-2 times to meet the organic or inorganic liquid of national product standard fertile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101209529A CN101779565B (en) | 2010-01-25 | 2010-01-25 | Production method for lowering cadmium content in Sauropus androgynus product |
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|---|---|---|---|
| CN2010101209529A CN101779565B (en) | 2010-01-25 | 2010-01-25 | Production method for lowering cadmium content in Sauropus androgynus product |
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| CN101779565A CN101779565A (en) | 2010-07-21 |
| CN101779565B true CN101779565B (en) | 2012-05-09 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102180745A (en) * | 2011-02-18 | 2011-09-14 | 中国热带农业科学院分析测试中心 | Irrigation fertilizer special for sauropus androgynus |
| CN102156064A (en) * | 2011-03-07 | 2011-08-17 | 中国热带农业科学院分析测试中心 | Sampling method of mineral element nutrition diagnosis of Sauropus androgynus plants |
| CN102210214B (en) * | 2011-04-14 | 2012-12-26 | 广东省农业科学院土壤肥料研究所 | Phosphate fertilizer application method capable of reducing content of Cd in leafy vegetables in acidic vegetable field |
| CN102870637B (en) * | 2012-09-18 | 2013-10-30 | 常州大学 | Rice field irrigation method for reducing content of cadmium in rice |
| CN102974606B (en) * | 2012-12-25 | 2013-10-16 | 湖南省土壤肥料研究所 | Soil conditioning method capable of reducing cadmium accumulation for paddy rice |
| CN103012017B (en) * | 2012-12-31 | 2014-07-23 | 中国水稻研究所 | Fertilizer for controlling cadmium accumulation of dry-land crops and preparation method thereof |
| CN103086800B (en) * | 2013-02-05 | 2014-12-03 | 中国水稻研究所 | Fertilizer for controlling cadmium accumulation of crops, and its preparation method |
| CN106478300B (en) * | 2016-11-03 | 2019-10-22 | 中国热带农业科学院分析测试中心 | A kind of acid soil improvement drop cadmium fertilizer reducing cadmium content in rice rice |
| CN107223430A (en) * | 2017-06-15 | 2017-10-03 | 北京市农林科学院 | A kind of agricultural method for obstructing Cd validity in facility leaf vegetables soil |
| CN112697729A (en) * | 2020-12-11 | 2021-04-23 | 中国热带农业科学院分析测试中心 | Test method for controlling cadmium content of agilawood leaves |
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