CN202133597U

CN202133597U - Device for measuring relationship between plant transpiration and leaf area

Info

Publication number: CN202133597U
Application number: CN201120260348U
Authority: CN
Inventors: 高晓飞; 刘宝元
Original assignee: Beijing Normal University
Current assignee: Beijing Normal University
Priority date: 2011-07-22
Filing date: 2011-07-22
Publication date: 2012-02-01
Anticipated expiration: 2021-07-22

Abstract

The utility model relates to a device for measuring relationship between plant transpiration and leaf area. The device comprises an inner cylinder, an outer cylinder and a water supply pipe, wherein, the inner cylinder adopts a cylinder body with a sealed bottom and a cover; a seedling-out hole is formed on the cover; the outer cylinder comprises an inner space, an outer space and a seedling-out slot; the inner cylinder is arranged in the inner space in a matched manner; the seedling-out slot corresponds to the seedling-out hole of the inner cylinder; and the water supply pipe is connected with the outer space of the outer cylinder. The device provided by the utility model has a reasonable structure, can effectively reduce or eliminate the disturbance of the environmental condition influencing the measuring result, is convenient to use and has accurate measuring result.

Description

A kind of device of measuring plant transpiration and leaf area relation

Technical field

The utility model belongs to water balance observation technology field, farmland, is specifically related to a kind of device of measuring plant transpiration and leaf area relation.

Background technology

Plant transpiration is meant the plant surface of moisture from living, and mainly is leaf, is lost to the process in the atmosphere with the water vapour state.In the farmland, plant transpiration and soil evaporation have constituted field evapotranspiration jointly.

It is generally acknowledged that soil evaporation belongs to invalid evaporation, and plant transpiration and plant leaf area there are confidential relation, and influence the biological yield of plant.The field evapotranspiration amount can be measured through equipment such as lysimeters, but differentiation soil evaporation and plant transpiration then are technical barriers.

There is the scholar to use potted plant or incubator, uses film, lid, stalk or sandstone overburden soil face, suppress soil evaporation; Because the growth quality of plant is lower than 5/1000ths of plant transpiration amount; Therefore, people use water balance method to measure plant transpiration usually, but potted plant and covering can cause plant evaporation environment and field actual conditions inconsistent; Especially the thermogenic action of solar radiation direct projection to the basin body; Or shine the reflex on the coverture, and suppress the factors such as temperature rising that soil evaporation brings, must more or less influence measuring accuracy.

The utility model content

The technical matters that the utility model will solve provides a kind of device of measuring plant transpiration and leaf area relation, and this apparatus structure is reasonable, can effectively reduce or eliminate the changes in environmental conditions that influences measurement result.

For reaching said purpose, the technical scheme that the utility model is taked:

A kind of device of measuring plant transpiration and leaf area relation comprises inner core, urceolus and feed pipe,

Said inner core is back cover, the cylindrical shell of lid is arranged that said covering is provided with the hole of emerging;

Said urceolus comprises inside and outside two sheaf spaces and emerges slit that what said inner core mated is arranged in the inner space; The hole of emerging of the said corresponding inner core of slit of emerging;

Said feed pipe is connected with outer space at urceolus.

Said outer wound packages soil keeps soil moisture content through feed pipe, is used to keep evaporitic environment; The slit of emerging is arranged at top, and the plant that can make inner core is through the slit growth.Said inner core is used for plant transpiration and measures.Inner core is the cylinder that back cover has lid, and cylinder top top cover can take off, and has covered slit, can supply the plant growth.

Preferably, said urceolus is formed by connecting in centrosymmetric two semicircular ring tubes, and the inwall of said semicircular ring tube is provided with upper groove and the low groove that communicates, and two low grooves of said two semicircular ring tubes cooperate and are inner space, and two upper grooves fit in the slit of emerging.

Further, the said two semicircular ring tubes cooperation of pegging graft each other.

The utlity model has following advantage:

Figure 2011202603486100002DEST_PATH_IMAGE002

the utility model is measured the plant transpiration amount through the urceolus identical with plant growth environment is set; Guarantee that as far as possible the measurement environment condition is consistent with actual conditions; Urceolus is that urceolus supplies water through feed pipe is set; Keep consistent with the moisture of inner core; Suppress the evaporation of inner core soil face with this, make it so to set up the relation of plant transpiration amount and its leaf area near " zero ".

Figure 2011202603486100002DEST_PATH_IMAGE004

the utility model reasonable in design; Inner core and urceolus all are provided for the slit of plant growth; Simple in structure, easy to use.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of urceolus;

Fig. 3 is the half side structural representation of Fig. 2;

Fig. 4 is the structural representation of inner core.

Embodiment

Below in conjunction with accompanying drawing the utility model is elaborated.

Embodiment

Like Fig. 1,2,3, shown in 4, present embodiment comprises inner core 1, urceolus 2 and feed pipe 3, and said inner core 1 is back cover, is provided with and covers 4 cylindrical shell that said lid 4 is provided with the hole 5 of emerging; Said urceolus 2 is pegged graft each other to cooperate by centrosymmetric two semicircular ring tubes and is formed, and the inwall of said semicircular ring tube is provided with the upper groove 21 and low groove 22 that communicates, and two low grooves 22 of said two semicircular ring tubes cooperate and are inner space, and this inner space is placed inner core 1; Two upper grooves fit in the slit 6 of emerging, said in 1 hole 5 correspondences of the emerging slit 6 of emerging, this emerge hole 5 and the slit 6 of emerging can make plant in the inner core 1 through growth.Said urceolus 1 dress soil, said feed pipe 3 is connected with outer space at urceolus 1, through feed pipe 3 maintenance urceolus 2 soil moisture contents, is used to keep evaporitic environment.

During measurement,

fills soil with inner core 1; Regulating moisture grows to plant and does not produce the lower limit soil moisture content when coercing; The sowing plant; Make the emerge hole 5 of the corresponding loam cake in position of plant; Use foam fine grained blocks the surface of the hole non-plant growth of emerging, and suppresses native face evaporation as far as possible, makes it near " zero "; Close the lid 4, its quality of weighing;

fills soil with urceolus 2, and it is consistent with inner core 1 to regulate moisture;

Figure 2011202603486100002DEST_PATH_IMAGE006

embeds urceolus 2 with inner core 1, makes hole 5 correspondences of the emerging slit 6 of emerging;

Figure 2011202603486100002DEST_PATH_IMAGE008

uses feed pipe 3 to supply water for urceolus 2; Make its water cut in evaporation process consistent, be used to keep evaporitic environment with inner core 1 soil conservation;

every interval is after 24 hours; The quality of claiming inner core 1; Because soil evaporation is suppressed basically, the difference of quality can be thought the plant transpiration value basically;

measured the variation of plant leaf area; And the rising value that records according to step

, can be in the hope of the relation of plant transpiration amount and plant leaf area.

Obviously, the foregoing description of the utility model only be for explain clearly that the utility model does for example, and be not to be qualification to the embodiment of the utility model.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here can't give exhaustive to all embodiments.Conspicuous variation that every technical scheme that belongs to the utility model is extended out or change still are in the row of the protection domain of the utility model.

Claims

1. a device of measuring plant transpiration and leaf area relation is characterized in that, comprises inner core, urceolus and feed pipe,

Said feed pipe is connected with outer space at urceolus.

2. the device of mensuration plant transpiration according to claim 1 and leaf area relation; It is characterized in that; Said urceolus is formed by connecting in centrosymmetric two semicircular ring tubes; The inwall of said semicircular ring tube is provided with upper groove and the low groove that communicates, and two low grooves of said two semicircular ring tubes cooperate and are inner space, and two upper grooves fit in the slit of emerging.

3. the device of mensuration plant transpiration according to claim 2 and leaf area relation is characterized in that, the cooperation of pegging graft each other of said two semicircular ring tubes.