| Technology of rice-duck farming using ducks omnivorous predator in the rice fields of weeds and pests using duck in the field of continuous activities to improve the ecological environment of paddy field,and stimulate the growth of rice and soil muddy water aeration effect,reducing carbon emissions while using duck droppings fertilize to ensure duck does not draft rice,can be used for the production of organic rice.In current research,mostly on rice-duck farming techniques and technologies for the prevention and control of disease,insects and weeds,increase output,incomes and other research.Based on duck the effects of weed control,and soil fertility as a goal,build duck field location tracking system,studying the movement of ducks in the field,exploring the best duck stocking density.By duck position information detection and analysis,density on the ducks was studied in field activities,scope,frequency and area of effect test of different stocking densities on weed distribution and effect of soil fertility,the main conclusions are as follows.(1)building duck location tracking system.By the positioning of the label,base stations and positioning engine,three parts form ultra-wideband(UWB)precise positioning systems,field location for real-time monitoring of ducks.Positioning of the label fixed on the duck wings,positioning base stations were installed in the experimental plot rectangle vertices and midpoints of the long side,positioning the base station by positioning the label timing pulse signal,the base station after receiving a signal to record label information and pass this information on to computer positioning engine,engine based on TDOA positioning method of calculation,analysis and storage.Positioning system tracking accuracy for 10-20cm,locate the tag data upload frequency of 0.33Hz(1/3s),label a single battery charge can last for 7 days.(2)the stocking density of ducks in the rice fields of activity have a certain effect.Test results show that,with increased stocking density,ducks in the field movement time also increases.Duck density is 15/660m2,20/660m2,25/660m2,and only at 30/660m2,ducks in the paddy fields within the movement used in the time of ducks in percentage of the total hours in the field are 13.08%,17.89%,21.05%and 21.48%.When duck densities of 25 only when/660m2 and 30/660m2,duck movement longer than duck density in the field for 15/660m2 Shi duck exercise duration in the field increased by 60.88%and 64.17%.Duck when stocked at 25-30/660m2,ducks in the field campaign for the longest time.(3)the stocking density on the duck field activities have a significant impact.Test results showed that as the stocking density increases,the ducks also expanded the range of activities in the field,but when the duck density reaches a critical value,along with increased stocking density,ducks in the field will not have significantly increased the range of movement.As measured by the ducks in the field location of the coefficient of variation duck range in the field,in duck density is 15/660m2,20/660m2,25/660m2,and only at 30/660m2,variation coefficient were 25.58%,34.6%,39.49%,and 40.29%.As the stocking density increases,the corresponding coefficient of variation is also increasing.Coefficient of variation is between the minimum and maximum,coefficient of variation increased 57.51%,with increased stocking density,coefficient of variation values increase the weight gradually decreases.However,ducks in the field regional accounts for each of the experimental plots with a total area of analysis as a percentage of ducks in the field activities,duck density is 15/660m2,20/660m2,25/660m2,and only at 30/660m2,ducks in the field activity percentage of the total area of each experimental plot total area were 80.03%,89.09%,92.12%,92.24%.Along with increased stocking density,duck movement in the field regional total with each experimental plot area also increased as a percentage of the total plot area.But duck when density is 25/660m2 and 30/660m2,ducks in the field movement with each experimental plot area increased as a percentage of the total plot area small,increased by only 0.12%.When duck density 25-30/660m2,duck movement best range of activities in the field.(4)the effects of stocking density on duck field has a certain frequency.The frequency is the ducks entered each cell within a day(1m2)number of times.Test results showed that the ducks in the field,the average frequency increases with increased stocking density.Duck reach the greater the frequency of each small cell,controlling weeds,insect pests,the better,more uniform effect on soil fertility.Duck density is 15/660m2,20/660m2,25/660m2,and only at 30/660m2,ducks in the total average frequency of field activities were 3.62/,4.03,4.59,4.53 times/times.(5)the ducks stocking density of paddy weed control and soil fertility significantly affected.Test results show that,with the increase of duck density,paddy fields within the four-Ye ping,sagittaria pygmaea,duck tongue and grass,Barnyard grass of field malignant weed density significantly reduced,ducks on the four-Ye ping control effect is particularly noticeable.Along with increased stocking density,duck droppings on soil organic matter and available n,p,k supplement increase.When stocking density of duck 25-30/660m2,controlling weeds and fertilize the soil works best.On the whole,duck when stocking density of 25/660m2-30/660m2,ducks in the field of active time,active,good range of motion,duck weed control and soil fertility improvement works best.Research on improved rice-duck farming techniques with references... |
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