Design And Experiment Of Airflow-assisted Pollinator Based On Highclearance Chassis For Hybrid Rice

In the process of hybrid rice seed production,pollination is an indispensable part of seed production,and full and uniform pollination is the premise and basis for obtaining high-quality,high-yield hybrid rice seeds.The traditional artificial-assisted pollination method has high labor intensity,poor pollination uniformity and low operating efficiency,which seriously hinders the mechanization of hybrid rice seed production.This project intends to study a variety of air-assisted hybrid rice seed pollinators,and design and produce a suitable high-gap hybrid rice seedling pollinator prototype to provide the efficiency of pollination operations in the early stage of ensuring that pollination quality meets the requirements.It is of great significance to improve the mechanization level of hybrid rice seed production in China.Based on the analysis of domestic and foreign hybrid rice mechanized seed-polishing techniques,according to the principle of pneumatic-assisted pollination,CFD numerical simulation technology is used to guide the cone-type and rotor-type ducted fan polluters,pipeline air-feeding polluters,etc.The airflow field distribution of the three airflow-assisted pollinators was numerically simulated.According to the preferred parameters,the corresponding high-gap hybrid rice seed pollinators were designed and tested in the field.In the field validation test,the airflow velocity of each airflow auxiliary pollinator was tested at different distances.In the actual pollination operation in the field,the slide-assisted high-gap hybrid rice seed pollinator was used to collect pollen after the pollination.The law of sedimentation was measured and its rate of seeding was assessed at harvest.The field pollination verification test results show that the diversion cone type ducted fan polluter performs the field pollination test at the same distance and the same speed,that is,the air flow velocity at the air outlet is 10m/s.The above-mentioned diversion cone type ducted fan high ground gap After the hybrid rice seed pollinator was rushed to powder,the average number of pollen measured,the average number per unit of field of view reached 3.99.After using a single-rotor drone to catch the powder,the average number of pollen measured was 3.48.Based on the use of a cone-type ducted fan high-gap hybrid rice pollinator to obtain a certain powder-washing effect,this paper proposes and designs a rotor-foiled fan pollinator and pipeline with better powder-powder effect.Two kinds of pollinators,such as air-passing type,were used to produce a rotor-type ducted fan-type high-gap hybrid rice seed pollinator and a pipeline-supplied high-span hybrid rice seed pollinator,and they were used to carry out related field-assisted pollination experiments.(The airflow speed at the air outlet is 10m/s).After powder-carrying,the average number of pollen of the rotor-type ducted fan-type highgap hybrid rice seedling pollinator was 84.7 and 7.34,respectively.44.2%,42.7%,the average yield per mu reached 100.10 kg/667m2,98.48 kg/667m2 respectively;the pollentype high-gap hybrid rice seed pollinator was compared with the agricultural drone to catch powder.The number is 8.54 and 7.34,respectively.The maternal seed setting rate is 50.7% and 48.2%,respectively.The average yield per mu is 191.85 kg/667m2 and 190.06 kg/667m2 respectively.In general,the airflow-assisted high ground gap hybrid rice seed production pollination The average pollen measured by the machine powder method is slightly better than the average pollen measured by the agricultural drone method,the seed setting rate is 47.45%,and the average yield is 145.98 kg/667m2.The airflow-assisted high-gap hybrid rice seed pollinator developed by this project has reached the actual production requirements for mechanization of hybrid rice seed production.