Uniform fertilization method based on differential pressure tank with optimal fertilizer concentration and constant fertigation flux

Hu, Xinyu; Chen, Xin

doi:10.1007/s00271-020-00712-0

Cited by 7 publications

(5 citation statements)

References 32 publications

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“…Compared with the significant impact of working pressure on the flow rate of the emitter, the pressure difference between the inlet and outlet of the aeration and fertilization tank has no significant impact on the flow rate of the emitter. This is because the pressure difference between the inlet and outlet of the fertilization tank mainly affects the uniformity of fertilization and cannot change the inlet pressure of the emitter flow channel [23]. This result is consistent with the research of Fan Junliang et al [20].…”

Section: Discussionsupporting

confidence: 90%

Performance of a Drip Irrigation System under the Co-Application of Water, Fertilizer, and Air

Li,

Ma,

Zhang

et al. 2023

Horticulturae

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The co-application of water, fertilizer, and air is a new water-saving irrigation method based on drip irrigation technology, which can effectively alleviate the phenomenon of soil rhizosphere hypoxia, improve water and fertilizer utilization efficiency, and inhibit the clogging of irrigation equipment in drip irrigation systems. The performance of drip irrigation systems is one of the important factors affecting the effectiveness of the co-application of water, fertilizer, and air. However, the impact of factors such as the aeration method, fertilization device, and working parameters on the performance of drip irrigation systems for the co-application of water, fertilizer, and air is still unclear. Therefore, based on two typical aeration methods, i.e., micro-nano and Venturi aeration, the performance of a drip irrigation system under the co-application of water, fertilizer, and air was studied by comparing and analyzing the effects of different aeration methods, working pressures of the drip irrigation system, and the pressure difference between the inlet and outlet of fertilizer irrigation on the spatial distribution uniformity of water, fertilizer, and air in the drip irrigation pipeline network. The results showed that the pressure difference between the inlet and outlet of fertilization irrigation had no significant impact on system performance, while the working pressure significantly affected system performance. Compared with the effective effect of Venturi aeration on system performance, micro-nano aeration can significantly affect drip irrigation system performance and effectively improve drip irrigation system performance. The micro-nano-aerated drip irrigation system with the co-application of water, fertilizer, and air under a working pressure of 0.1 MPa has better system performance. The research results are of great significance for revealing the mechanism underlying the impact of the co-application of water, fertilizer, and air on the performance of drip irrigation systems and constructing efficient drip irrigation technology for the co-application of water, fertilizer, and air.

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Section: Discussionsupporting

confidence: 90%

Performance of a Drip Irrigation System under the Co-Application of Water, Fertilizer, and Air

Li,

Ma,

Zhang

et al. 2023

Horticulturae

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“…Yang Xin [21] and others found that the flow rate and differential pressure is a power function of the mathematical relationship between the role of the increase in differential pressure leads to a subsequent increase in the flow rate, while the concentration of fertilizer out of the mouth of the fertilizer with the change in time is an exponential decrease, but also so that it is concluded that the amount of fertilizer applied to the case of too high and too low and small differential pressure is not conducive to the uniform distribution of fertilizer under the drip irrigation system. Hu Xinyu [22] and others pointed out that the traditional differential pressure fertilization tank fertilizer application process of about 70% to 80% of the fertilizer belongs to the range of over-fertilizer or insufficient fertilization, the team verified the feasibility of using computer control with the electric control valve to achieve the control of the uniformity of fertilizer, but there are cumbersome operation, the high cost of the problem.…”

Section: Differential Pressure Tank Fertilizer Applicatorsmentioning

confidence: 98%

Water Fertilizer Integration Equipment Research Status and Development Trend

Sui,

Yang,

Lin

et al. 2023

AJST

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Integrated water and fertilizer technology can accurately adjust the mix of water and fertilizer on demand, and then through the irrigation system, water and fertilizer are delivered to the roots of the crop in quantity, on time, and with precision. As an important part of the integrated system of water and fertilizer, the fertilizer has a critical influence on the quality of the fertilizing system. Nowadays, the development of intelligent agriculture has become a general trend of agricultural development. By exploring the development process of water and fertilizer mixing, this paper sorted out the research status of various kinds of fertilizers in China, compared different mixing methods of water and fertilizer, and analyzed and summarized the excellent working performance of different fertilizers. Secondly, the current research emphases were discussed, including precision fertilization technology, intelligent control, comprehensive utilization of resources and circular agriculture. Then, the development trend of integrated water and fertilizer equipment is put forward, including the improvement of precision fertilization, the development of multifunctional integrated equipment, and the application of data management and decision support system. Through continuous technological innovation and application, the integrated equipment of water and fertilizer is expected to play a greater role in the agricultural field.

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“…In the formula, V is the volume of the mixed liquid; H b is the density of alkali in the mixture; H x is the density of biogas slurry in the device; L x is the volume of biogas slurry; L b is the input amount of alkaline solution, and L b = t × L n , where t is the time for starting the pump and L n is the flow rate of alkali solution per minute each time the pump starts; L in is the input flow rate within the system device; K b is the weak base ionization equilibrium constant, and PK b = − log(K b ); and pH is a variable in output process [6,7,17,18].…”

Section: Modifying the Ph Of Biogas Production During Dry Fermentationmentioning

confidence: 99%

“…In the research on optimizing nonlinear intelligent control algorithms, feedback control and adaptive control methods are mostly used. The T-S fuzzy controller used in this investigation has difficulty handling time-varying and delayed environmental pH control, and more efficient and fast optimization algorithms need to be studied [7].…”

Section: Introductionmentioning

confidence: 99%

T-S Fuzzy Algorithm Optimized by Genetic Algorithm for Dry Fermentation pH Control

Wang

Shen

et al. 2023

Processes

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In the process of anaerobic dry fermentation to produce biogas, maintaining a suitable pH in the environment is more conducive to the degradation of crop straw. When the pH in the fermentation environment is too low, the process of anaerobic digestion by anaerobic bacteria is inhibited. Therefore, it is necessary to quickly adjust the pH. In this work, we studied the control technology of a pH regulation system and then constructed a T-S fuzzy controller. Upon simplifying the T-S fuzzy controller, the system delay time was reduced, and two genetic algorithms with different fitness performance indicators were used to optimize the T-S fuzzy control. The simulation experiment in this study was designed through simulation software, and the results show that the improved control method has a fast regulation ability. Finally, on-site experiments were conducted using the four control methods under the acidification conditions set in the experimental device. The results show that the control method used in this study to improve performance by integrating the error sum of squares has a short control time and small oscillation and overshoot, and it can better regulate the environmental pH to achieve appropriate conditions when acidification occurs during anaerobic dry fermentation.

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Uniform fertilization method based on differential pressure tank with optimal fertilizer concentration and constant fertigation flux

Cited by 7 publications

References 32 publications

Performance of a Drip Irrigation System under the Co-Application of Water, Fertilizer, and Air

Performance of a Drip Irrigation System under the Co-Application of Water, Fertilizer, and Air

Water Fertilizer Integration Equipment Research Status and Development Trend

T-S Fuzzy Algorithm Optimized by Genetic Algorithm for Dry Fermentation pH Control

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