CN103837664B - The portable measuring method for measuring of a kind of loess area natural meadow soil moisture content - Google Patents
The portable measuring method for measuring of a kind of loess area natural meadow soil moisture content Download PDFInfo
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- CN103837664B CN103837664B CN201410077695.3A CN201410077695A CN103837664B CN 103837664 B CN103837664 B CN 103837664B CN 201410077695 A CN201410077695 A CN 201410077695A CN 103837664 B CN103837664 B CN 103837664B
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Abstract
The present invention relates to the portable measuring method for measuring of a kind of loess area natural meadow soil moisture content, this detailed process is: step a, gathers the plant leaf blade of loess area natural meadow; Step b, is converted into image with scanner by the described plant leaf blade gathered; Step c, utilizes image analysis software to calculate its leaf area, after the oven dry in an oven after scanning, measures its dry weight, calculates the specific leaf area of each species; Steps d, collects grassland soil top layer, described loess area 0-10cm water cut, and in conjunction with the specific leaf area of acquired plant leaf blade, sets up regression equation; The data that the soil moisture content data that the present invention records also record compared with conventional method are accurate and reliable; By measuring the specific leaf area indirect determination soil moisture content of plant leaf blade, the drawback of conventional Methods for Measuring Soil Water Content: A farthest can be avoided.
Description
Technical field
The present invention relates to Soil Testing, particularly relate to the portable measuring method for measuring of a kind of loess area natural meadow soil moisture content.
Background technology
Along with conceding the land to forestry the enforcement of careless engineering in loess area, loess area natural grassland vegetation and soil quality recover to achieve noticeable achievement; Moisture is an important component part of soil, and it not only affects the physical property of soil, is also simultaneously to form the important factor of of soil fertility, is one to cut plant the pacing items of depending on for existence.
The method measuring soil moisture content in prior art has a lot, as oven drying method, electric-resistivity method, Neutron probe method, gamma-rays (transmission) method, time-domain reflectomer (TDR) etc., but due to the reason such as variability of soil texture, quality and unit weight, making any one method when measuring water cut, all there is certain error.
Oven drying method measures the most general method of soil moisture content, and shortcoming is time-consuming, effort, and comprehensive cost is not low, sampling meeting spoiled soil, and deep layer sampling difficulty, unavoidably brings error by sampling transposition during one-point measurement; Electric-resistivity method has delayed action, and measurement range generally can only arrive 100kPa, and after dry, resistance bolck contacts bad with soil, and sensitivity is very low; When Neutron measures soil water content, indoor and outdoor curve differs greatly, and the different soil physical properties in field can cause the movement that curve is larger, and the while that research showing that Neutron vertical resolution is poor, Neutron is expensive, there is potential radiation hazard, therefore can not widespread use; Gamma-rays method is same with Neutron probe method exists safety problem, makes it apply inconvenience; The precision that the water cut of the upper soll layer that TDR instrument measures measures than Neutron is much higher, but is not suitable for saline-alkali soil soil surveying.
In view of above-mentioned defect, creator of the present invention obtains this creation finally through long research and practice.
Summary of the invention
The object of the present invention is to provide the portable measuring method for measuring of a kind of loess area natural meadow soil moisture content, in order to overcome above-mentioned technological deficiency.
For achieving the above object, the invention provides the portable measuring method for measuring of a kind of loess area natural meadow soil moisture content,
This detailed process is:
Step a, gathers the plant leaf blade of loess area natural meadow;
Step b, is converted into image with scanner by the described plant leaf blade gathered;
Step c, utilizes image analysis software to calculate its leaf area, after the oven dry in an oven after scanning, measures its dry weight, calculates the specific leaf area of each species;
Steps d, collects grassland soil top layer, described loess area 0-10cm water cut, and in conjunction with the specific leaf area of acquired plant leaf blade, sets up regression equation;
In this step, by measuring loess area natural meadow, the specific leaf area of the common dominant plant blade on totally 15 Typical Representative sample ground also collects the water cut at the upper soll layer 0-10cm place of these sampled points simultaneously, and the equation of linear regression both setting up.
Further, in above-mentioned steps d, the equation of linear regression of foundation is: wherein, Y represents Soil reference materials (%) to Y=0.0774X+7.8379, and X represents the specific leaf area (cm2/g) of blade.
Further, in above-mentioned steps c, described baking oven design temperature is 80 DEG C, dries 48h; Described specific leaf area is that leaf area is divided by leaf dry weight.
Further, in above-mentioned steps a, the described plant leaf blade of collection does not comprise petiole, every Plants 10 blades.
Beneficial effect of the present invention is compared with prior art: the data that the soil moisture content data that the present invention records also record compared with conventional method are accurate and reliable; By measuring the specific leaf area indirect determination soil moisture content of plant leaf blade, the drawback of conventional Methods for Measuring Soil Water Content: A farthest can be avoided.
Not spoiled soil prototype structure, avoid conventional determining soil moisture drawback while, by measuring the specific leaf area of plant leaf blade, calculate soil moisture content rapidly.The method is simple, easy, and the data recorded compared with conventional method are accurate and credible.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the portable measuring method for measuring of loess area of the present invention natural meadow soil moisture content;
Fig. 2 is the schematic diagram of equation of linear regression of the present invention.
Embodiment
Below in conjunction with accompanying drawing, to above-mentioned being described in more detail with other technical characteristic and advantage of the present invention.
The portable measuring method for measuring of loess area of the present invention natural meadow soil moisture content, establishes the regression equation between loess area natural meadow plant leaf blade specific leaf area and soil moisture content.
Refer to shown in Fig. 1, it is the process flow diagram of the portable measuring method for measuring of loess area of the present invention natural meadow soil moisture content, and this detailed process is:
Step a, gathers the plant leaf blade of loess area natural meadow;
Loess area natural meadow comprises meadow steppe, Steppe, desert steppe, and described plant leaf blade does not comprise petiole, every Plants 10 blades;
Step b, is converted into image with scanner by the described plant leaf blade gathered;
Step c, after the oven dry in an oven utilizing image analysis software to calculate after the scanning of its leaf area, measures its dry weight, calculates the specific leaf area of each species;
Described baking oven design temperature is 80 DEG C, dries 48h; Described specific leaf area be leaf area divided by leaf dry weight, as shown in following formula:
Steps d, collects the soil moisture content of meadow, described loess area on vertical section, and in conjunction with the specific leaf area of acquired plant leaf blade, sets up regression equation.
The present invention also collects the water cut at the upper soll layer 0-10cm place of these sampled points by the specific leaf area of the common dominant plant blade measuring loess area natural meadow (totally 15 Typical Representative sample ground) simultaneously, and the equation of linear regression both setting up.
Refer to shown in Fig. 2, it is the schematic diagram of equation of linear regression of the present invention, and this equation of linear regression is: wherein, Y represents Soil reference materials (%) to Y=0.0774X+7.8379, and X represents the specific leaf area (cm2/g) of blade.
In figure, R2 represents regression coefficient, and P represents level of significance, and P<0.001 shows that the regression relation of the specific leaf area of Soil reference materials and blade statistically has significant difference.
This regression equation can be good at reflecting the relation between the specific leaf area of loess area natural meadow and soil moisture content, because this regression equation is based upon multiple grassland (meadow steppe, Steppe and desert steppe) group and basis builds, there is certain representativeness and comprehensive
The data that the soil moisture content data that the present invention records also record compared with conventional method are accurate and reliable; By measuring the specific leaf area indirect determination soil moisture content of plant leaf blade, the drawback of conventional Methods for Measuring Soil Water Content: A farthest can be avoided.
Not spoiled soil prototype structure, avoid conventional determining soil moisture drawback while, by measuring the specific leaf area of plant leaf blade, calculate soil moisture content rapidly.The method is simple, easy, and the data recorded compared with conventional method are accurate and credible.
The foregoing is only preferred embodiment of the present invention, is only illustrative for invention, and nonrestrictive.Those skilled in the art is understood, and can carry out many changes in the spirit and scope that invention claim limits to it, amendment, even equivalence, but all will fall within the scope of protection of the present invention.
Claims (3)
1. a portable measuring method for measuring for loess area natural meadow soil moisture content, is characterized in that, this detailed process is:
Step a, gathers the plant leaf blade of loess area natural meadow; Described loess area natural meadow comprises meadow steppe, Steppe, desert steppe, and described plant leaf blade does not comprise petiole, every Plants 10 blades;
Step b, is converted into image with scanner by the described plant leaf blade gathered;
Step c, utilizes image analysis software to calculate its leaf area, after the oven dry in an oven after scanning, measures its dry weight, calculates the specific leaf area of each species;
Steps d, collects grassland soil top layer, described loess area 0-10cm water cut, and in conjunction with the specific leaf area of acquired plant leaf blade, sets up regression equation;
In this step, by measuring loess area natural meadow, the specific leaf area of the common dominant plant blade on totally 15 Typical Representative sample ground also collects the water cut at the upper soll layer 0-10cm place of these sampled points simultaneously, and the equation of linear regression both setting up.
2. the portable measuring method for measuring of loess area according to claim 1 natural meadow soil moisture content, it is characterized in that, in above-mentioned steps d, the equation of linear regression set up is: Y=0.0774X+7.8379 wherein, Y represents the moisture % amount of upper soll layer, X represents the specific leaf area of blade, and unit is cm
2/ g.
3. the portable measuring method for measuring of loess area according to claim 1 and 2 natural meadow soil moisture content, is characterized in that, in above-mentioned steps c, described baking oven design temperature is 80 DEG C, dries 48h; Described specific leaf area is that leaf area is divided by leaf dry weight.
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| CN201410077695.3A CN103837664B (en) | 2014-02-28 | 2014-02-28 | The portable measuring method for measuring of a kind of loess area natural meadow soil moisture content |
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| CN103837664B true CN103837664B (en) | 2016-01-27 |
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| US6870376B1 (en) * | 2003-09-20 | 2005-03-22 | William G. Gensler | Method and apparatus for determining plant water content |
| CN102455282B (en) * | 2010-10-25 | 2013-04-17 | 北京农业信息技术研究中心 | Method for measuring soil water content |
| CN102297817B (en) * | 2011-07-22 | 2013-05-29 | 北京师范大学 | Measuring method and device for determining relationship between plant transpiration and leaf area |
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