Experiment And Study Of Variable Rate Fertilizer Applicator

The purpose of Precision Agriculture is obtaining the best economical benefit with the reasonable devotion. It can protect the environment and insure the continuance development of agriculture.The variable rate fertilization technology can live up to teleology scientific fertilization. It can make scientific prescription of N, P and K, multi-microelement which can accelerate the crop growth and organic manure according to the different area, different agrotype, profit and loss of soil nutrient, crop sort and yield level. Using this can decrease the environmental pollution with the excessive fertilization and the drop of farm produce quality. It also has effect to abridged edition and increase render.In China, the extrude problem of fertilization is the configuration illogical and low utilize rate. The variable rate fertilization technology is a feasible choice for give attention to agricultural economic benefit and entironment, also for accelerate the continuance development of agriculture. It realizes to control the fertilize capacity with the machine traveling. It can availably improve the fertilizer utilize rate and profit and alleviate the environmental pollution.Model 2BFQ-6 precision seeder and variable rate fertilizer applicator is use the variable control system overseas for the common absorb precision seeder. It adopts 6 troughs of cast aluminum outer trough fertilizer wheel. Its fertilize range is 0-675kg/hm², and its precision less than 5%, its work breadth is 3⁵m. The control and actualize system of variable rate fertilization consist of DGPS, Field Computer, Hydraulic Motor, Ground Sensing Radar and fertilizer assembly.The article introduces the work principle and process of model 2BFQ-6 precision seeder and variable rate fertilizer applicator. And also presents the parameter setting and installation and debugging of variable control and actualize system. In the test-bed part, the author self-governments the variable fertilize test-bed and it realize the variable fertilize utilize the transducer to control the rev of electromotor. We gain the fertilize capacity of six different type fertilizer wheel in different rev. Then calculate its average C.V and compare it. The result is C.V._{6槽铸铝}< C.V._{8槽铸铝}6槽塑料(é•¿)8槽塑料(短) 8槽塑料(é•¿)6槽塑料(短). It means that the average C.V. of 6 troughs of cast aluminum fertilizer wheel is the least. So we choose it for variable rate fertilizer applicator. We gain the fertilize capacity of 6 troughs of cast aluminum fertilizer wheel in different tongue position and rev. Likewise the result is C.V.₂< C.V.₃654. It means that when the tongue in NO.2 position the average C.V. is the least. So the tongue of 6 troughs of cast aluminum fertilizer wheel should in NO.2 position. We also gain the fertilize capacity of 6 troughs of cast aluminum fertilizer wheel with different work length in different rev. Likewise the result is C.V._20mm< C.V._30mm 40mm. It means that when the work length...