CN103149343A - Novel method for researching forest soil organic substance decomposition - Google Patents
Novel method for researching forest soil organic substance decomposition Download PDFInfo
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- CN103149343A CN103149343A CN2013100607772A CN201310060777A CN103149343A CN 103149343 A CN103149343 A CN 103149343A CN 2013100607772 A CN2013100607772 A CN 2013100607772A CN 201310060777 A CN201310060777 A CN 201310060777A CN 103149343 A CN103149343 A CN 103149343A
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Abstract
The invention mainly relates to a novel method for researching forest soil organic substance decomposition, and belongs to a research technology of forest soil organic substance decomposition. As most traditional researches take forest litters which are different in properties as materials, the compatibility of research results is poor. The method provided by the invention solves the problems of localization of the research results and the like caused by big error in measurement of forest soil organic substance decomposition rate and the lack of unfired research materials in the prior art. The novel method is characterized in that wood of the same species at different test areas is made to standard small wooden bars with the specification of 2.5cm*2.5cm*15cm, the small wooden bars are fixed on an upper soil layer using U-shaped nails, square holes are made by using a T-shaped punch, and the small wooden bars are inserted in the square holes for the long-term localized observation of the forest soil organic substance decomposition. By adopting the method disclosed by the invention, research materials in the research on the forest organic substance decomposition are unified and error is reduced, so that different results are comparable, and the method is simple and easy to implement and can be widely used for the researches on the forest soil organic substance decomposition.
Description
One, technical field
The present invention relates to the research method of forest soil organic matter decomposition, be specifically related to decomposition of soil organic matter investigative technique in a kind of Chinese pine plantation.
Two, background technology
The soil organism is the pith that Forest Ecosystem Productivity consists of, and can for tree growth provide a large amount of nutrients, can also affect conversion rate and the quantity of available nutrient simultaneously, and then affect the growth of surface vegetation after it decomposes.Therefore, the research about forest soil organic matter decomposition mechanism receives much concern.
China is object research forest organic matter decomposition mainly with Forest Litter, and modal research method is method of nylon bag, and (size of bag is 15～600cm namely to utilize nylon net bag
2, screen distance is 2～10mm) the certain organism (as leaf, stem Litter-fall or fibrous paper) of packing into, is placed in soil surface or buries to be placed in the dark soil of 5～10cm.This kind method is easy and simple to handle, but the Litter-fall bag self is one of factor of organic substance decomposing in the impact bag, its mesh is too small to be affected organism and naturally contacts, and the excessive Litter-fall fragment that easily causes of mesh is lost, thereby utilizes the method research organic matter decomposition rate error larger.For make research means reflect field condition as far as possible, to obtain the result near state of nature, have the researcher to adopt nylon screen covering method, but the difference of Litter-fall self property still cause between different results of study without comparability.In addition, also have the scholar to adopt the Litter-fall wheel to put decomposition method, namely the Litter-fall collected of different location decomposes in same place, and the Litter-fall of same place collection decomposes in the different location, but this method wastes time and energy, poor operability.Therefore, research can be sought unity of standard, and simple and easy to do research method is significant again.
The present invention plans the little batten that same tree lumber is made into same size, be the standard organism, bury in the soil that is put in different levels, take out after certain hour, measure the decomposition situation of little batten, this is a kind of method of carrying out long-term location observation forest organic matter decomposition.Its advantage is that the organism self property is unified, need not to decompose mesh bag, and organism is in the natural decomposition state, reduces error, and simple, can be widely used in the investigation and research of forest soil organic matter decomposition.
Three, summary of the invention
The purpose of this invention is to provide a kind of new method of studying the forest soil organic matter decomposition, solved in background technology forest organic matter decomposition rate determination error large, lack the research material of unified standard, thereby cause the locality of result of study and without problems such as comparabilities.
A kind of new method of studying the forest soil organic matter decomposition is characterized in that:
(1) the little batten of standard
Over 50 years, the few principle of trunk direct sum tree knot, select the starting material of the little batten of production standard greater than 30cm, the age of tree greater than 30m, the diameter of a cross-section of a tree trunk 1.3 meters above the ground according to the height of tree, select the sapwood of trunk partly to be made into the little batten of standard that specification is 2.5cm * 2.5cm * 40cm.And little batten is cut into A section 2.5cm * 2.5cm * 15cm, B section 2.5cm * 2.5cm * 10cm and C section 2.5cm * 2.5cm * 15cm three parts, and making marks with label respectively, B section part is in contrast wherein carried out the mensuration of initial properties, does not bury and puts; All A sections and the little batten of C section are weighed and record.
(2) "T"-shaped card punch
"T"-shaped card punch is comprised of vertical hollow square perforated pipe and cross bar handles two parts.Vertical hollow square perforated pipe: adopt steel to cast the hollow perforated pipe of wall thickness 4mm, internal diameter 2.5cm * 2.5cm, height 40cm, lower port is through fully thermal treatment, have very high hardness, and make marks with red paint at distance lower port 15cm place, the upper end is connected with handle.Cross bar handles: adopt steel to cast length 30cm, the solid handle of diameter 2.5cm is welded on vertical hollow square perforated pipe upper end with handle center, casts the cylindrical hammering head of diameter 3.5cm, high 3cm with steel in the upper end over against the handle pad.
Patent of the present invention solves the technical scheme that its technical matters adopts:
(1) the horizontal A section of the little batten of standard or C section are placed in soil surface, fixing with " U " staple (diameter 3mm, length is that the steel wire of 32.5cm is folded in half into internal diameter (distances between two legs) 2.5cm, single leg length is 15cm).
(2) dig out the square opening of 2.5cm * 2.5cm * 15cm specification in soil mineral layer with "T"-shaped card punch, adopt the perpendicular mode of putting that standard little batten A section or C section are inserted wherein, and make marks with the colored penoncel of difficult degradation.
This method advantage and characteristic are: unified the research material of forest organic matter decomposition, reduced error, made to have comparability between Different Results, and easy to operation, can be widely used in the investigation of forest soil organic matter decomposition.
Four, embodiment
In the practical study investigation, at first need experimental field laying sample ground according to the test demand, minute Litter Layer and soil mineral layer are two-layer in sample ground subsequently carries out burying of the little batten of standard and puts, Litter Layer adopts horizontal mode, (diameter 3mm, length is that the steel wire of 32.5cm is folded in half into internal diameter (distances between two legs) 2.5cm, single leg length is 15cm) fixes A section or the C section of little batten with " U " staple; The mineral layer adopts the perpendicular mode of putting, the upper soll layer Litter-fall is removed, hold the cross bar handles of "T"-shaped card punch, beaing the hammering head with hammer makes card punch embed mineral layer soil to the red-label place, then card punch is extracted, thus the square hole of formation 2.5cm * 2.5cm * 15cm, the impact of batten being decomposed to eliminate soil density, A section or the C section of the little batten of standard are inserted, and used the fixing colored little flag of " U " staple to put mark to bury aside.Long term monitoring is carried out in decomposition to the little batten of standard.Determine sample time according to Soil moisture and temperature condition experimental field, general approximately 4 months to 2 years.After the time of putting is buried in arrival, little batten is taken out, the physicochemical properties such as its weight, physical strength, lignin and content of cellulose are measured.With measurement result with do not bury the corresponding properties of putting little batten B section and compare, just can obtain organic decomposition situation.
Claims (4)
1. the little batten of standard, make with the timber of unified specification, it is characterized in that: the little batten of standard is buried be put in forest soil, take out after a period of time, measure its physicochemical property, by relatively burying the physical and chemical properties change before and after putting, can understand organic decomposition situation.
2. the little batten of standard according to claim 1, according to the height of tree greater than 30m, the diameter of a cross-section of a tree trunk 1.3 meters above the ground is greater than 30cm, the age of tree was over 50 years, the few principle of trunk direct sum tree knot, select the starting material of the little batten of production standard, select the sapwood of trunk partly to be made into the little batten of standard that specification is 2.5cm * 2.5cm * 40cm, and little batten is cut into A section 2.5cm * 2.5cm * 15cm, B section 2.5cm * 2.5cm * 10cm and C section 2.5cm * 2.5cm * 15cm three parts, make marks with label respectively, wherein the B section in contrast, carry out the mensuration of initial properties, do not bury and put, all A sections and the little batten of C section are weighed and record, then bury and put.
3. "T"-shaped card punch, mainly formed by vertical hollow square perforated pipe and cross bar handles two parts, it is characterized in that: can get the square opening of 2.5cm * 2.5cm * 15cm in forest soil, in order to insert standard according to claim 2 little batten A section or C section.
4. "T"-shaped card punch according to claim 3, vertically the hollow square perforated pipe adopts steel to cast the hollow perforated pipe of wall thickness 4mm, internal diameter 2.5cm * 2.5cm, height 40cm, lower port is through fully thermal treatment, has very high hardness, and make marks with red paint at distance lower port 15cm place, the upper end is connected with handle; Cross bar handles adopts steel to cast length 30cm, and the solid handle of diameter 2.5cm is welded on vertical hollow square perforated pipe upper end with handle center, casts the cylindrical hammering head of diameter 3.5cm, high 3cm with steel in the upper end over against the handle pad.
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| CN201310060777.2A CN103149343B (en) | 2013-02-27 | 2013-02-27 | Novel method for researching forest soil organic substance decomposition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111239364A (en) * | 2020-01-14 | 2020-06-05 | 重庆大学 | Rapid evaluation method for function damage degree of soil in contaminated site |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893543A (en) * | 2010-06-29 | 2010-11-24 | 云南省农业科学院热区生态农业研究所 | Method for long-term fixed-position measuring soil erosion in gully |
| CN201800081U (en) * | 2010-10-05 | 2011-04-20 | 李贵生 | Combined perforator for drip irrigation device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893543A (en) * | 2010-06-29 | 2010-11-24 | 云南省农业科学院热区生态农业研究所 | Method for long-term fixed-position measuring soil erosion in gully |
| CN201800081U (en) * | 2010-10-05 | 2011-04-20 | 李贵生 | Combined perforator for drip irrigation device |
Non-Patent Citations (2)
| Title |
|---|
| 孙巧玉等: "坡位对油松人工林地上生物量分配格局的影响", 《中南林业科技大学学报》, vol. 32, no. 9, 30 September 2012 (2012-09-30) * |
| 欧阳明八: "利用化学改性剂提高木材尺寸稳定、耐腐和阻燃性能", 《人造板通讯》, no. 01, 31 December 1998 (1998-12-31), pages 5 - 10 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111239364A (en) * | 2020-01-14 | 2020-06-05 | 重庆大学 | Rapid evaluation method for function damage degree of soil in contaminated site |
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