Identification and Biological Characteristic Analysis of Pythium aristosporum Causing Rice Seedling Blight in Northeast China

Liu, Jinxin; Xu, Chuzheng; Han, Wenbo; Li, Yonggang

doi:10.21203/rs.3.rs-95446/v1

Cited by 3 publications

(5 citation statements)

References 25 publications

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“…Excessive recovery time can affect plant growth and development progress, reduce the average number of tillers and maturing rate, and restrict the increase in yield. This is the same as the conclusion reached by Liu Jun and he, H [36,37]. At the same time, when the biomass-based nursery trays are returned to the field, organic substances such as nitrogen, phosphorus and potassium are formed under the action of soil microorganisms, which can enhance soil fertility and improve soil structure.…”

Section: Effect Of Nursery Trays On Yieldsupporting

confidence: 74%

Structural Design and Performance Test of Biomass-Based Nursery Trays

Wang

Zou

et al. 2022

Sustainability

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To realize sustainability in agricultural production, structure design and performance testing of biomass-based nursery trays was carried out in this study. Starting from meeting the agronomic requirements of rice seedling raising and mechanical transplanting, the method of combining theoretical analysis with experimental verification was used to clarify the design ideas and structural design basis of the biomass-based nursery tray. Key structural dimension parameters, such as the lateral dimensions of the seedling tray, the longitudinal size of the nursery tray, and the depth of the pothole bowl, were optimized. Meanwhile, developed biomass-based nursery trays and plastic flat nursery trays were used as seedling carriers, and a non-woven fabric and a plastic film were used as isolation materials for seeding trials. The experiment consisted of three treatments: a non-woven fabric under plastic flat nursery trays (CK), a non-woven fabric under biomass-based nursery trays (CK1), and a plastic film under biomass-based nursery trays (CK2). Comparative analysis of the seedling emergence rate, seedling quality, and yield under different nursery methods was carried out in the experiment. The results showed that the seedling emergence rate of CK1 and CK2 increased by 9.1% and 9.5%, respectively, compared with the traditional seedling raising method (CK). In terms of seedling quality, the overall quality of the seedlings cultivated with biomass-based nursery trays improved, and the improvement in traits was particularly obvious in the group of seedlings with a plastic film as isolation materials (CK2), with final results showing a 5.8% increase in yield. The results of this study can provide a theoretical basis for establishing a rice cultivation technology system suitable for China’s national conditions, and can also provide technical support for increasing the use of biomass-based nursery trays to achieve the sustainable development of agriculture.

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Section: Effect Of Nursery Trays On Yieldsupporting

confidence: 74%

Structural Design and Performance Test of Biomass-Based Nursery Trays

Wang

Zou

et al. 2022

Sustainability

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“…In order to ensure the safe operation of the control cabin underwater, a static simulation of the cabin body was analyzed. The applied pressure was 1.5 MPa [17]. Since the two ends of the hatch body are supported by the hatch cover, it was only necessary to impose fixed constraints on the two ends of the hatch body.…”

Section: Control Cabin Structure Designmentioning

confidence: 99%

“…where K is the safety factor. The design parameters of the robot are as follows [17]: G = 250 N, L = 380 mm, H = 112 mm, K = 1.5, k = 10, µ = 0.4. By substituting the above design parameters into Equation ( 8), the magnetic adsorption forces required by the magnetic adsorption unit can be obtained as follows: the adsorption forces in sliding along the wall: F a ≥ 46.86 N; the longitudinal overturning adsorption force: F a ≥ 55.26 N.…”

Section: Stability Analysis Of Robot Magnetic Adsorptionmentioning

confidence: 99%

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Development of Portable Magnetic Adsorption Amphibious Robot

Ren,

Zhu,

Liu

et al. 2024

Applied Sciences

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In this study, a portable magnetic adsorption amphibious robot which can operate on and below the waterline is developed for special curved environments, such as the pile legs of offshore platforms and the outer walls of ships. An open robot integrated control system based on a domestic chip is developed, and two operating modes of local control operation and remote wireless operation are realized. A permanent magnet adsorption scheme combining a magnetic adsorption track and a synchronous belt wheel is designed, static and dynamic analysis of the wall-climbing operation of the robot is carried out, and a kinematic model of the underwater robot is established. The experimental results show that the robot can effectively complete amphibious tasks and can realize the accurate control of attitude in water, proving it to be an effective tool for amphibious tasks, such as operating on the pile legs of offshore platforms and the outer walls of ships.

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“…The weeding periods of rice were 7 days and 15 days after transplanting. In this study, the mechanical property parameters of rice and weeds were obtained from the relevant literature [27] and measuring experiments using a bending force meter and a tensiometer. The results are shown in Table 1.…”

Section: Mechanical Properties Of Rice and Weedsmentioning

confidence: 99%

Development and Experimentation of Intra-Row Weeding Device for Organic Rice

Jiao,

Hu,

Chen

et al. 2024

Agriculture

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Weeds in paddy fields can seriously reduce rice yield. An intra-row weeding device with double-layer elastic rods was designed, considering the differences in mechanical properties between rice and weeds, which can press weeds into the soil and avoid damaging rice. The elastic force of the elastic rods can be adjusted by changing the position of the regulating mechanism to adapt to different weeding conditions. A measurement experiment was conducted to determine the variation rule of elastic force. The quadratic orthogonal rotation combination discrete element simulation experiment, which used weeding depth and weeding speed as experimental factors, and the amount of soil disturbance and the force of the inner and outer elastic rod in the horizontal and vertical directions as experimental indicators, was conducted to study the interaction between the weeding device and the soil. The optimal weeding parameters were obtained: the weeding depth was 15 mm, the weeding speed was 0.9 m/s. The field experiment, which used the various parameters of the weeding device as experimental factors and the weeding rate and damaging seedling rate as experimental indicators, was conducted to determine the weeding effect. The experimental results showed that the optimal position of the regulating mechanism was 270 mm, with a weeding rate of 80.65% and a damaging seedling rate of 3.36%. The weeding rate can be increased by at least 11.18% by adjusting the regulating mechanism to a suitable position under the same weeding conditions. This study can provide a reference for research on weeding machinery for organic rice.

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Identification and Biological Characteristic Analysis of Pythium aristosporum Causing Rice Seedling Blight in Northeast China

Cited by 3 publications

References 25 publications

Structural Design and Performance Test of Biomass-Based Nursery Trays

Structural Design and Performance Test of Biomass-Based Nursery Trays

Development of Portable Magnetic Adsorption Amphibious Robot

Development and Experimentation of Intra-Row Weeding Device for Organic Rice

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