CN100580053C - Soil improving agent for reducing lead content of tea and method thereof - Google Patents
Soil improving agent for reducing lead content of tea and method thereof Download PDFInfo
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- CN100580053C CN100580053C CN 200710068073 CN200710068073A CN100580053C CN 100580053 C CN100580053 C CN 100580053C CN 200710068073 CN200710068073 CN 200710068073 CN 200710068073 A CN200710068073 A CN 200710068073A CN 100580053 C CN100580053 C CN 100580053C
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Abstract
A soil improver reducing the lead content of tea leaves and a method are provided, which is characterized in that the improver consists of a product A and a product B; wherein, the product A is calcium carbonate and / or dolomite fines and the product B is the mixture of the product A, phosphate rock powder and / or calcium-magnesia phosphate fertilizer; the weight ratio of the product A, phosphate rock powder and / or calcium-magnesia phosphate fertilizer in the product B is 2 to 4 : 1. The above soil improver reducing the lead content of tea leaves and the method provide that reducing the lead content of tea leaves is the main purpose, reasonably use the calcium carbonate, dolomite fines, phosphate rock powder and calcium-magnesia phosphate fertilizer, which not only reduces the absorption of the tea plant to the heavy metals, improves the hygienic quality standards of tea leaves but also does not affect the normal growth and development of tea plant and has the function of improving the soil and can effectively reduce the bioavailability of the lead in the tea garden soil.
Description
Technical field
The invention belongs to the severe acidification heavy metal-polluted soil and administer and the recovery technique field, be specifically related to a kind of soil improvement agent and method that reduces plumbi content of tea.
Background technology
Lead is the physiological and the nervous poison of a kind of high property accumulated, polyaffinity, almost can produce murder by poisoning to all important organs of human body and system, as central nervous system, immunity system, reproductive system and endocrine system etc., wherein particularly serious to the murder by poisoning of central nervous system.Concerning children,, influence children's behavior and intellectual level even the Lead contamination of trace also can damage its neural system.Source plumbous in the human body is many-sided, and mainly by food, water and air, for the adult, the plumbous main path of taking in is a food.Therefore, food comprises that the lead content in the tealeaves has caused consumers in general's extensive concern.But in recent years, the phenomenon that plumbi content of tea exceeds standard is common all in medium.According to tealeaves institute of the Chinese Academy of Agricultural Sciences between 1999～calendar year 2001, to produce from 17 in the whole nation tea economize comprise green tea, black tea, oolong tea, compressed tea etc. the mensuration of totally 1225 tea samples show, plumbi content of tea is between Tr.-97.9mg/kg, mean value and intermediate value are respectively 2.7mg/kg and 1.4mg/kg, the tea sample that surpasses former national standard 2mg/kg is up to 32%, and the tea sample of wherein super new national standard 5mg/kg accounts for 12%.Simultaneously, plumbi content of tea has ever-increasing trend, 1996 is 0.63mg/kg as dragon well green tea mean lead content, 0.74mg/kg in 1997,0.87mg/kg in 1998,1999 is 1.45mg/kg, the mean value of calendar year 2001 and 2004 is respectively 1.93 and 2.20mg/kg.The source of Lead contamination is many-sided in the tealeaves, comprises air participates (vehicle exhaust), soil, tea machinery and processing etc., and wherein soil is the important source of plumbi content of tea.Tea tree is the sour crop of typical happiness, soil can continue acidifying after planting tea, particularly in recent years, because tea economy is profitable, the tea grower uses chemical fertilizer in a large number, causes soil acidification serious, the tool investigation, river, Zhejiang, Wan San are economized tea garden soil PH and are lower than 4.0 severe acidification and seriously bring up to 44% by 14% before 10 years, thereby cause the biological effectiveness of soil lead to significantly improve, and plumbi content of tea constantly raises.
At present, the improvement for heavy-metal contaminated soil mainly reduces the heavy metal in soil constituent content by physics method (comprising soil removal and replacement, soil moved in to improve the original dilution and drip-rinsing process etc.), chemical method (comprising adsorption precipitation, redox and antagonism of ions etc.) and biological process (mainly by the super accumulation of plantation plant).Or reduce the absorption of plant, and some effects have been obtained to heavy metal element.But, how to reduce the intravital lead content of crop for uncontamination soil such as tea places and then also lack corresponding way.Though it is fixing plumbous that lime carbonate, ground dolomite, ground phosphate rock and fused(calcium magnesium)phosphate have tangible absorption, reduce the ability of plumbous biological effectiveness in the soil, the research report is also being arranged aspect the improvement lead pollution of soil, but also do not appearing in the newspapers so far aspect the uncontamination soil remediations such as tea garden soil.
Summary of the invention
The object of the invention is to overcome the above-mentioned problems in the prior art, provides a kind of and can effectively reduce plumbi content of tea, improves the tea garden soil modifying agent of the sustainable energy for growth of soil and the technical scheme of method.
The soil improvement agent of described reduction plumbi content of tea, it is characterized in that this soil improvement agent is made up of product A and product B, wherein product A is lime carbonate and/or ground dolomite, product B is the mixture of product A and ground phosphate rock and/or fused(calcium magnesium)phosphate, and the weight ratio of product A and ground phosphate rock and/or fused(calcium magnesium)phosphate is 2～4: 1 in the product B.
The soil improvement agent of described reduction plumbi content of tea, it is characterized in that described lime carbonate, ground dolomite fineness requirement more than 80% by 100 mesh sieves.
The soil improvement agent of described reduction tealeaves aluminium content is characterized in that described ground phosphate rock or fused(calcium magnesium)phosphate are agricultural grade phosphate fertilizer.
Described soil improvement agent reduces the method for plumbi content of tea, it is characterized in that:
1) adopts the soil improvement agent of forming by product A and product B, wherein product A is lime carbonate and/or ground dolomite, product B is the mixture of lime carbonate and/or ground dolomite and ground phosphate rock and/or fused(calcium magnesium)phosphate, and the weight ratio of lime carbonate and/or ground dolomite and ground phosphate rock and/or fused(calcium magnesium)phosphate is 2～4: 1 in the product B;
2) product A and product B usage ratio are: 10～20: 1;
3) product A is executed for the soil face, evenly spreads fertilizer over the fields in tea tree in the ranks, and product B is ditch spread, is applied in the dressing furrow in the ranks.
The method of described reduction plumbi content of tea is characterized in that the acidizing degree according to soil, and total consumption standard of soil improvement agent is as follows: the soil of pH4.2-4.5, total consumption of soil improvement agent is 1200～2400kg/hm
2The soil of pH3.9-4.2, total consumption of soil improvement agent is 1500～3000kg/hm
2The soil of pH3.5～3.9, total consumption of soil improvement agent is 2100～4800kg/hm
2The soil of pH＜3.5, total consumption of soil improvement agent is 3000～7200kg/hm
2
The method of described reduction plumbi content of tea is characterized in that the every 2-3 of described soil improvement agent uses once.
The method of described reduction plumbi content of tea is characterized in that the described dressing furrow degree of depth is 10-25cm.
The method of described reduction plumbi content of tea is characterized in that when pH＜3.5, and the soil improvement agent application in two dressings is spaced apart half a year to 1 year at every turn.
The soil improvement agent and the method for above-mentioned reduction plumbi content of tea, having proposed to reduce plumbi content of tea is main purpose, reasonably use lime carbonate, ground dolomite, ground phosphate rock and fused(calcium magnesium)phosphate, can reduce the absorption of tea tree to heavy metal element, improve the sanitary quality standard of tealeaves, the normal growth that does not influence tea tree is again grown, and plays the effect of improving the soil, and can reduce biological effectiveness plumbous in the tea garden soil effectively.
Present patent application unless otherwise indicated, all proportionings are the weight proportion of active princlple.
Embodiment
With the test example the present invention is described in further detail by the following examples.
Specific embodiment 1:
Get tea garden soil and carry out pot experiment, the soil lead tolerance is 65mg/kg, pH is 3.7, (ratio of product A and B is 10: 1 to the soil improvement agent of reduction plumbi content of tea, product A is a lime carbonate, product B is made up of lime carbonate and fused(calcium magnesium)phosphate, and both ratios are 2: 1) amount of application be 0,1 and 2g/kg (be equivalent to execute 0,2400 and 4800kg/hm
2), 6 strains of annual Dragon Well tea 43 tea shoots of every basin kind through growth in 2 years, are measured the intravital lead content of tea tree.The result shows that after plumbous modifying agent fell in use, along with the raising of soil pH and the reduction of Available Lead content, each position lead content of tea tree all had obvious reduction, wherein executes the processing of 2g/kg, and the young sprout lead content has reduced by 17% (table 1).
The influence of plumbous modifying agent to the tea tree lead content falls in the potted plant soil of using of table 1
Specific embodiment 2:
Carry out field test in one-tenth tea place in age, the tea garden soil lead tolerance is 58mg/kg, pH is 3.6, (ratio of product A and B is 20: 1 to the soil improvement agent of reduction plumbi content of tea, product A is a ground dolomite, product B is made up of ground dolomite and ground phosphate rock, and both ratios are 4: 1) amount of application be respectively 0,2400 and 7200kg/hm
2, 7200kg/hm wherein
2Handle and execute at twice.After modifying agent is manured into soil, passed through continuous 4 years observation.The result shows, removes and falls plumbous modifying agent use (2002) not significantly difference then, and the plumbi content of tea of all the other each years all has remarkable reduction, falls plumbous amplitude 8%～38%, average out to 24% (table 2).Mensuration to the plumbous component of soil shows that also after plumbous modifying agent fell in use, higher exchange state and the carbonate combined lead of biological effectiveness had remarkable reduction in the soil, wherein executes 7200kg/hm
2Processing and exchanging attitude lead only account for 0.7% of total lead, and control treatment is up to 12.6% (table 3), meanwhile, residual attitude lead has obviously to be carried, after this also is to use and falls plumbous modifying agent, the significantly reduced major reason of plumbi content of tea.
Table 2 field is used soil and is fallen the influence of plumbous modifying agent to tea tree young sprout lead content (mg/kg)
| Plumbous modifying agent consumption (kg/hm falls 2) | 2002 | 2003 | 2004 | 2005 |
| 0 | 1.25±0.05 | 1.14±0.04 | 1.62±0.10 | 1.03±0.11 |
| 2400 | 1.13±0.09 | 1.05±0.02 | 1.31±0.09 | 0.64±0.06 |
| 7200 | 1.18±0.13 | 0.92±0.04 | 1.13±0.04 | 0.69±0.10 |
The influence (with total lead is 100) of plumbous modifying agent to the plumbous component of soil falls in table 3
| Plumbous modifying agent consumption (kg/hm falls 2) | Exchange state | The carbonate combined | The Fe-Mn oxide compound | Organic | Residual attitude | Add up to |
| 0 | 12.6 | 4.7 | 7.5 | 7.4 | 67.8 | 100.0 |
| 2400 | 1.6 | 1.7 | 6.4 | 6.0 | 84.3 | 100.0 |
| 7200 | 0.7 | 0.8 | 10.0 | 6.5 | 81.9 | 100.0 |
Product A is executed for the soil face in the soil improvement agent of above-mentioned reduction plumbi content of tea, and product B is ditch spread, and the specific requirement product A is evenly spread fertilizer over the fields in tea tree in the ranks; Product B is used in in the ranks the dressing furrow, and the dressing furrow degree of depth is 10-25cm.The soil improvement agent that reduces plumbi content of tea is used in pH and is lower than 4.5 severe acidification tea place, can stop using when soil pH surpasses 4.5.
Claims (6)
1. reduce the soil improvement agent of plumbi content of tea, it is characterized in that this soil improvement agent is made up of product A and product B, wherein product A is lime carbonate and/or ground dolomite, product B is the mixture of product A and ground phosphate rock and/or fused(calcium magnesium)phosphate, the weight ratio of product A and ground phosphate rock and/or fused(calcium magnesium)phosphate is 2～4: 1 in the product B, and product A and product B usage ratio are: 10～20: 1.
2. the soil improvement agent of reduction plumbi content of tea as claimed in claim 1, it is characterized in that described lime carbonate, ground dolomite fineness requirement more than 80% by 100 mesh sieves.
3. the soil improvement agent of reduction plumbi content of tea as claimed in claim 1 is characterized in that described ground phosphate rock or fused(calcium magnesium)phosphate are agricultural grade phosphate fertilizer.
4. utilize claim 1,2 or 3 described soil improvement agents to reduce the method for plumbi content of tea, it is characterized in that:
1) adopts the soil improvement agent of forming by product A and product B, wherein product A is lime carbonate and/or ground dolomite, product B is the mixture of lime carbonate and/or ground dolomite and ground phosphate rock and/or fused(calcium magnesium)phosphate, and the weight ratio of lime carbonate and/or ground dolomite and ground phosphate rock and/or fused(calcium magnesium)phosphate is 2～4: 1 in the product B;
2) product A and product B usage ratio are: 10～20: 1;
3) product A is executed for the soil face, evenly spreads fertilizer over the fields in tea tree in the ranks, and product B is ditch spread, is applied in the dressing furrow in the ranks;
4) be used for the soil that acidizing degree is pH 3.5-3.9, total consumption of soil improvement agent is 2100～4800kg/hm
2
5. the method for reduction plumbi content of tea as claimed in claim 4 is characterized in that the every 2-3 of described soil improvement agent uses once.
6. the method for reduction plumbi content of tea as claimed in claim 4 is characterized in that the described dressing furrow degree of depth is 10-25cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200710068073 CN100580053C (en) | 2007-04-18 | 2007-04-18 | Soil improving agent for reducing lead content of tea and method thereof |
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| CN 200710068073 CN100580053C (en) | 2007-04-18 | 2007-04-18 | Soil improving agent for reducing lead content of tea and method thereof |
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| CN101108967A CN101108967A (en) | 2008-01-23 |
| CN100580053C true CN100580053C (en) | 2010-01-13 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102352253B (en) * | 2011-07-27 | 2013-05-15 | 中国农业科学院茶叶研究所 | Soil amendment and method for reducing fluorine content of fresh brick tea leaves |
| CN102941222A (en) * | 2012-11-23 | 2013-02-27 | 中国农业科学院茶叶研究所 | Method for improving seriously acidized tea garden soil |
| CN103909086A (en) * | 2013-01-08 | 2014-07-09 | 中国科学院城市环境研究所 | Soil improvement agent and method for reducing heavy metal content in tea |
| CN103773378B (en) * | 2014-01-21 | 2016-03-30 | 中国农业科学院农业资源与农业区划研究所 | A kind of suspended state soil conditioner and preparation method thereof |
| CN103936530B (en) * | 2014-04-29 | 2016-05-11 | 武汉理工大学 | A kind of compound adjusting control agent and application process thereof of cadmium pollution soil repair |
| CN109452110B (en) * | 2018-12-12 | 2021-06-08 | 湖南袁禾农业科技有限公司 | Cultivation and planting method utilizing interaction between biological factors |
Citations (2)
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| CN1919484A (en) * | 2006-09-07 | 2007-02-28 | 昆明理工大学 | Plant restoration method for lead pollution of soil |
| CN1935401A (en) * | 2006-05-31 | 2007-03-28 | 清华大学 | Acidated forestry soil repairing method |
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|---|---|---|---|---|
| CN1935401A (en) * | 2006-05-31 | 2007-03-28 | 清华大学 | Acidated forestry soil repairing method |
| CN1919484A (en) * | 2006-09-07 | 2007-02-28 | 昆明理工大学 | Plant restoration method for lead pollution of soil |
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Assignee: Xiamen Mountain Tea Co., Ltd. state tea Assignor: Tea Inst. of Chinese Academy of Agriculture Sciences Contract record no.: 2011330001460 Denomination of invention: Soil improving agent for reducing plumbi content of tea and method thereof Granted publication date: 20100113 License type: Exclusive License Open date: 20080123 Record date: 20111216 |
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