Design and experiment of intelligent irrigation system for cotton field based on P-M model
[Objective]Design and experiment of intelligent irrigation system for cotton field based on P-M model.[Methods]Based on P-M model,a set of intelligent irrigation system for cotton field was de-signed,which consisted of four parts:data acquisition node,wireless communication node,cloud platform de-cision terminal,and irrigation application node.The data collected by the meteorological equipment of the data acquisition node was wirelessly transmitted to the cloud platform decision terminal.Then the terminal calculated the single irrigation amount based on the P-M model,automatically sent irrigation instructions at the specified irrigation time,and the irrigation application node received the instructions to open the valve for precise irriga-tion.The soil moisture change was monitored and wirelessly transmitted to the cloud platform by the moisture e-quipment of the data acquisition node in real time;The local traditional irrigation mode was taken as the con-trol(CK),the irrigation system was set with 120%(W1),100%(W2)and 80%(W3)irrigation modes,and the actual test of three treatments was carried out in the field to verify the system effect.[Results]The irriga-tion work of the three experimental groups was fully intelligent under the condition of no human intervention,and the system effectively and accurately executed the irrigation instructions;W2 mode could be selected when the irrigation water was sufficient.When the total water consumption was 16.85%higher than that of the tradi-tional mode,the soil salt content decreases by 13.65%,the seed cotton yield increases by 20.84%,and the water use efficiency increases by 3.41%.It significantly increased the yield and effectively improved the soil environment;Compared with traditional irrigation,the total water consumption of W3 was reduced by 6.52%,the soil salt content was increased by 0.16%,the salinization rate slowed,the yield of seed cotton increased by 11.18%,and the water use efficiency greatly improved,which achieved the effects of both improving yield and saving water.[Conclusion]The effectiveness and feasibility of the intelligent irrigation system has been verified in practice,which increases the range of optional parameters of the irrigation system.
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