Water and nitrogen absorption root culture observation device for leguminous green manure intercropping field

Abstract

The utility model discloses a water and nitrogen absorption root system culture observation device for a leguminous green manure intercropping field. The water and nitrogen absorption root system culture observation device comprises an outer frame, an observation tank, a supporting frame and a climbing rod. The outer frame is of a cuboid structure, a plurality of containing grooves are formed in the outer frame and used for containing observation tanks, and labels are arranged on the front portions of the containing grooves. The observation tank is a transparent cylindrical tank with an open top and a closed bottom, and the outer wall of the observation tank is attached to the inner wall of the containing groove. The supporting frame is located in the observation tank and comprises a vertically-arranged supporting rod and a fixing ring. The climbing rods are rotatably arranged in the supporting frame, and threaded grooves with different curvatures are formed in the surfaces of rod bodies. Root growth is directly observed through the transparent observation tank, the device does not need to be opened, the natural growth environment of the root is prevented from being disturbed, and observation accuracy is improved. The threaded groove of the climbing rod guides the root system to grow orderly, so that the root system is uniformly distributed, the root systems at different positions are conveniently and comprehensively observed, and the growth condition of the root system is accurately evaluated.

Description

TECHNICAL FIELD

[0001] The utility model provides an observation device belongs to crop culture technical field, especially relates to a leguminous green manure intercropping field water and nitrogen absorption root culture observation device. BACKGROUND

[0002] Leguminous green manure refers to leguminous plants used as fertilizer, which has root nodules on the root system, and the rhizobia can fix nitrogen in the air into organic nitrogen compounds to provide rich nitrogen nutrients for plants. There are many types of leguminous green manure, among which arrow pea and hairy leaf vetch are common and excellent green manure crops in the northwest region. Arrow pea and hairy leaf vetch are both cold and cool type green manure crops, with the characteristics of early growth and rapid development, suitable for use as green manure in intercropping and multiple cropping systems. Their root systems are developed, can strongly enrich and activate soil nutrients, have a small carbon-nitrogen ratio, low lignin content, fast mineralization, and small humification coefficient, and can activate and update soil organic matter after application, improve soil organic matter composition, and improve soil nitrogen supply capacity. In addition, arrow pea and hairy leaf vetch can also be used as livestock feed, with high utilization value and economic benefits.

[0003] In plant growth research, observing root system is of great significance. Root system is the key organ for plant to absorb water and nutrients, and its growth condition directly affects the growth and development of plants. By observing root system, important information such as plant's utilization efficiency of soil nutrients, growth dynamics of root system, and plant's adaptability to different environmental conditions can be deeply understood, providing scientific basis for plant cultivation and soil management. Therefore, accurate and comprehensive observation of root system has important value for plant scientific research and agricultural production practice.

[0004] However, the existing observation structure is mostly a culture dish, which has many deficiencies in actual application. When it is necessary to observe plant root system, the culture device often needs to be opened, which not only is cumbersome to operate, but also easily disturbs the natural growth environment of root system, affecting the accuracy of observation results. In addition, for root system at different positions, the existing observation structure may not be able to achieve effective and comprehensive observation. Since root system extends in all directions during growth, some root system may be hidden in the shade and cannot be clearly observed, thereby affecting the evaluation of the overall growth condition of root system. At the same time, the related structure of the existing device also needs to be further disclosed and optimized to better meet the needs of root system observation. UTILITY MODEL CONTENT

[0005] In order to make up for the deficiencies of the prior art, the present application provides a leguminous green manure intercropping field water and nitrogen absorption root culture observation device, which solves the problems of cumbersome operation, easy disturbance of root system growth environment and inability to comprehensively observe root system at different positions when observing leguminous green manure root system with the existing observation structure.

[0006] In order to solve the above technical problems, the utility model provides the following technical scheme: a leguminous green manure intercropping field water and nitrogen absorption root culture observation device, including outer frame, the inside of outer frame is equipped with observation jar, support frame and climbing pole,

[0007] The outer frame is a cuboid frame structure, a plurality of containing grooves for containing the observation jars are uniformly distributed in the interior, the upper portion and both sides of the containing grooves are open, and a label card for identification is arranged at the front portion of each containing groove.

[0008] The support frame is located in the interior of the observation jar, and a plurality of climbing poles are rotatably arranged in the support frame; the climbing poles are provided with screw grooves with different curvatures, and the screw grooves extend spirally along the length direction of the climbing poles.

[0009] Preferably, the observation jar is a transparent cylindrical jar body, is placed in the containing groove, the top of the observation jar is open, the bottom is closed, and the outer wall of the observation jar is attached to the inner wall of the containing groove.

[0010] Preferably, the support frame comprises a plurality of vertically arranged support rods, a fixed ring fixedly connected with the support rods, the fixed ring and the inner bottom side of the observation jar abut, a "Wen" type support is fixedly connected above the end of the support rod away from the fixed ring, and the upper end of the climbing pole is rotatably connected with the support through a T-shaped limiting rod.

[0011] The side, away from the support rod, of the support is fixedly connected with a cover corresponding to the observation jar.

[0012] Preferably, the cover is provided with a plurality of evenly distributed and penetrating air holes; the label card is fixed to the front portion of the outer frame through a screw, and a label page is movably arranged in the label card.

[0013] Preferably, the depth of the screw groove gradually decreases from the bottom to the top of the climbing pole.

[0014] One or more technical solutions provided in the embodiment have at least the following technical effects or advantages:

[0015] The device is characterized in that the outer frame of the cuboid frame structure is provided with a plurality of accommodating grooves for accommodating observation tanks which are uniformly distributed in the inner part of the outer frame, the opening of the accommodating grooves faces forward, and a label card is arranged at the front part, so that the observation tanks can be easily identified and taken; the observation tank is made of transparent material, the internal root growth condition can be directly observed, the natural growth environment of the roots is avoided to be interfered, and the accuracy of the observation result is improved; meanwhile, the inner part of the observation tank is provided with a supporting frame and a rotatable climbing rod, the climbing rod is provided with thread grooves with different curvatures, the roots are guided to grow along the thread grooves in an orderly manner, the roots are more uniformly distributed, and the problem that the roots are hidden in the shadow and cannot be clearly observed is avoided, so that the roots at different positions can be comprehensively observed, and the overall growth condition of the roots can be accurately evaluated.

[0016] Other advantages, objects, and features of the present application will be apparent to those skilled in the art from the following description, and it is intended to cover any and all adaptations of the present application within the scope of the claims. It is intended to cover the following claims and any and all equivalents thereof. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a perspective view of the legume green manure intercropping field water and nitrogen absorption root culture observation device of the present application;

[0018] Figure 2 It is a cross-sectional view of the outer frame of the legume green manure intercropping field water and nitrogen absorption root culture observation device of the present application;

[0019] Figure 3 It is an exploded view of the observation tank of the legume green manure intercropping field water and nitrogen absorption root culture observation device of the present application;

[0020] Figure 4 It is a cross-sectional view of the rotating climbing rod of the legume green manure intercropping field water and nitrogen absorption root culture observation device of the present application.

[0021] As shown in the figure:

[0022] 1, outer frame; 2, observation tank; 3, supporting frame; 4, climbing rod; 11, accommodating groove; 12, label card; 13, air hole; 31, supporting rod; 32, fixing ring; 41, thread groove. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application; the use herein of the terms "and / or" includes any and all combinations of one or more of the associated listed items.

[0026] As shown in Figure 1 and Figure 2 A legume green manure intercropping field water and nitrogen absorption root system observation device includes an outer frame 1 and an observation tank 2. The outer frame 1 is a cuboid frame structure with a length of 1.5-2.0 m, a width of 0.8-1.2 m, and a height of 0.6-1.0 m. Six to twelve accommodation grooves 11 for accommodating the observation tank 2 are uniformly distributed in the horizontal direction inside the outer frame 1. Openings are provided above and on both sides of the accommodation grooves 11, and the opening size is 5-10 mm larger than the diameter of the observation tank. A label card 12 with a size of 60 mm x 40 mm is provided at the front of each accommodation groove 11 and is fixed by screws. A replaceable waterproof label page is movably arranged in the label card 12. The observation tank 2 is a transparent cylindrical tank body with a wall thickness of 3-5 mm, a diameter of 150-200 mm, and a height of 300-350 mm. The top is open, the bottom is closed to form a 3-5° flow guide slope, the outer wall is matched with the inner wall of the accommodation groove 11 with a gap of 2-3 mm, and the observation tank 2 is placed in the accommodation groove 11. The outer frame 1 is provided with 12-24 evenly distributed air holes 13 with a diameter of 8-12 mm, and the distance between adjacent air holes is 80-120 mm.

[0027] In this embodiment, the cuboid structure of the outer frame 1 and the design of the plurality of accommodation grooves 11 can accommodate multiple observation tanks 2 at the same time, facilitating large-scale root system observation experiments. The label card 12 at the front of each accommodation groove 11 can clearly identify different observation tanks 2, facilitating experimental management and data recording. The transparent material and specific size design of the observation tank 2 ensure a good observation field of view and provide sufficient growth space for the root system in the tank body. The combination design of the support frame 3 and the climbing rod 4 provides stable support and guidance for the plant root system, allowing the root system to grow in an orderly manner along the threaded groove 41 of the climbing rod 4, facilitating observation and research.

[0028] By setting a rotatable climbing rod 4 inside the observation tank 2 and designing screw grooves 41 with different curvatures, the growth habits of different types of plant root systems can be adapted to, and the adhesion and growth efficiency of the root systems can be improved. Secondly, the gradual design of the depth of the screw grooves 41 helps to guide the uniform distribution of the root systems in the soil at different depths, promoting the comprehensive absorption of water and nitrogen by the root systems, and thus more truly reflecting the growth conditions and absorption characteristics of the root systems. In addition, the overall device is compactly designed, the connection relationship between the components is stable and does not interfere with each other, which not only ensures the stability of the device, but also facilitates disassembly and cleaning, prolonging the service life of the device. This innovative design provides an efficient, accurate and convenient tool for the cultivation and observation of water and nitrogen absorption root systems in legume green manure intercropping fields, which helps to deeply study the growth rules and ecological functions of plant root systems and promotes the development of related fields such as agricultural ecology and soil science.

[0029] As shown in Figure 3 and Figure 4 , a legume green manure intercropping field water and nitrogen absorption root system cultivation and observation device, comprising a support frame 3 and a climbing rod 4. The support frame 3 is located inside the observation tank 2 and is composed of 6 vertical support rods 31 with a spacing of 50-80 mm and a fixed ring 32 fixedly connected with the support rods 31. The inner diameter of the fixed ring 32 is 5-10 mm smaller than the inner diameter of the observation tank and is in contact with the inner bottom side of the observation tank 2. The climbing rod 4 is rotatably arranged under the support frame 3 of the support frame 3 through a T-shaped limiting rod, with a length of 40-60 cm and a diameter of 2-3 cm. The curvatures of the screw grooves 41 on each climbing rod 4 are different. The screw grooves 41 extend helically along the length direction of the climbing rod 4 with a pitch of 20-30 mm. The depth of the screw grooves 41 gradually decreases from the bottom to the top, with a bottom groove depth of 3-5 mm gradually changing to a top groove depth of 1-2 mm. The difference between the adjacent screw groove spacings is controlled within a range of ±0.5 mm.

[0030] At the same time,

[0031] 1. Specialized modular control system

[0032] The outer frame 1 is provided with 6-12 containing grooves 11, and each containing groove is provided with an independent observation tank 2, forming multiple groups of control experiment modules.

[0033] In view of the symbiotic nitrogen fixation characteristics of legume green manure (arrow pea, hairy vetch), the modular design realizes synchronous comparison experiment, eliminates the difference of environmental variables, and improves the data comparability.

[0034] The traditional device is mostly a single container, which cannot realize multiple synchronous observation. The standardized containing groove structure (opening size tolerance ±5-10 mm) of the present design ensures the consistency of the experiment.

[0035] 2. Root system guiding and observation integrated structure

[0036] The curvature of each climbing rod 4 is different, and the depth gradually changes (3-5mm→1-2mm) with a pitch of 20-30mm.

[0037] The thread groove with different curvatures simulates the natural soil pore gradient, guides the legume root system to grow along the preset path, strengthens the root system's nitrogen fixation function, and facilitates the observation of nodule distribution rules.

[0038] The curvature change (curvature radius 5-15mm) of the thread groove matches the characteristics of the main root meristem of arrow pea, promoting the physical interaction between root hairs and thread grooves.

[0039] 3. Transparent visual monitoring system

[0040] The observation tank 2 is made of transparent material (such as acrylic), with a diameter of 150-200mm and a height of 300-350mm, and a 3-5° drainage slope is set at the bottom.

[0041] Through the transparent tank body, in-situ non-destructive observation is realized, and combined with the bottom drainage design, it avoids the interference of water accumulation on root growth (suitable for the drought-tolerant and water-averse characteristics of hairy leaf sida).

[0042] Traditional root observation requires destructive sampling, and this device balances the light transmission and structural strength through a tank wall thickness of 3-5mm, supporting long-term dynamic monitoring.

[0043] In addition,

[0044] 1. Precise adaptation to legume green manure characteristics

[0045] Climbing rod parameters: length 40-60cm matching the main root length of arrow pea (about 50cm at maturity), thread groove spacing difference ±0.5mm to ensure that the root system microenvironment difference is controllable.

[0046] Tank volume design: 300-350mm height covers more than 80% of the root distribution area of legume plants, and a diameter of 150-200mm provides space for lateral root expansion (the lateral root radiation radius of hairy leaf sida is about 80mm).

[0047] 2. Flexible and expandable control experiment system

[0048] The outer frame size (1.5-2.0m×0.8-1.2m) supports 6-12 groups of experiments, meeting the repeatability requirements of field experiments (agricultural test standard repetition number ≥3).

[0049] The label card (12) uses a 60mm×40mm waterproof label page to realize multi-parameter identification (such as variety, fertilizer amount, observation date), avoiding the damage problem of traditional paper labels.

[0050] 3. Root-environment interaction regulation mechanism

[0051] The inner diameter of the fixed ring 32 of the support frame 3 is 5-10 mm smaller than the tank body, forming a root growth boundary constraint, simulating the field competition environment.

[0052] The air hole 13 has a diameter of 8-12 mm and a spacing of 80-120 mm, balancing the oxygen concentration in the tank (legume rhizobium oxygen demand≥15%vol), avoiding the uneven ventilation problem of traditional devices.

[0053]

[0054] When using the legume green manure intercropping field water and nitrogen absorbing root system culture observation device, first, according to the research requirements, the number and layout of the containing grooves in the outer frame are determined, the transparent observation tank is placed in each containing groove, the outer wall of the observation tank is ensured to be in close contact with the inner wall of the containing groove, and each observation tank is identified by a label card. Then the support frame is assembled inside the observation tank, and the climbing rod with different curvature thread grooves is rotatably installed in the support frame. Then legume green manure plants such as arrow-shaped peas or hairy vetch are planted in the observation tank, so that the roots grow along the thread grooves under the guidance of the climbing rod. During the growth process, the growth condition of the roots is directly observed through the transparent wall of the observation tank, without opening the device, so as to avoid interfering with the natural growth environment of the roots. After the experiment is completed, the observation tank and the internal components can be easily disassembled, cleaned and maintained for next use.

[0055] Although the utility model has disclosed as above with preferred embodiments, it is not used to limit the utility model, anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the utility model, therefore the protection scope of the utility model should be limited by the claims.

Claims

1. A legume green manure intercropping field water and nitrogen absorption root system culture observation device, comprising an outer frame (1), characterized in that: The outer frame (1) is internally provided with observation tanks (2), support frames (3) and climbing rods (4); The outer frame (1) is a cuboid frame structure, and a plurality of containing grooves (11) for containing observation tanks (2) are uniformly distributed inside the outer frame (1). The containing grooves (11) are open at the top and on both sides, and each containing groove (11) is provided with a label card (12) for identification at the front. The support frame (3) is located inside the observation tank (2), and a plurality of climbing rods (4) are rotatably arranged in the support frame (3). The climbing rod (4) is provided with a thread groove (41) with different curvatures, and the thread groove (41) spirally extends along the length direction of the climbing rod (4).

2. The device according to claim 1, wherein the device is characterized by: The observation tank (2) is a transparent cylindrical tank body placed in the containing groove (11). The top of the observation tank (2) is open, the bottom is closed, and the outer wall of the observation tank (2) is in close contact with the inner wall of the containing groove (11).

3. The device according to claim 1, wherein the device is characterized by: The support frame (3) includes a plurality of vertically arranged support rods (31) and a fixed ring (32) fixedly connected with the support rods (31). The fixed ring (32) and the inner bottom side of the observation tank (2) are in contact. The support rod (31) is fixedly connected with a "Wen" type support at the upper end away from the fixed ring (32). The upper end of the climbing rod (4) is rotatably connected with the support through a T-shaped limiting rod. The support is fixedly connected with a cover corresponding to the observation tank (2) on the side away from the support rod (31).

4. The device according to claim 3, wherein: The cover is provided with a plurality of evenly distributed and penetrating air holes (13) on the upper surface. The label card (12) is fixed to the front of the outer frame (1) by screws, and a label page is movably arranged in the label card (12).

5. The device according to claim 1, wherein the device is characterized by: The depth of the thread groove (41) gradually decreases from the bottom to the top of the climbing rod (4).

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