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Abstract. According to the natural rubber deep fertilization ditch depth of 10~30cm between the width of 30~40cm between the requirements,we developed a fine ditch fertilizing machine. This paper introduces its structure and principle in detail. The machine uses a hoof-shaped furrow structure and centrifugal fertilizer structure. The machine is simple and easy to maintain. After testing, the machine can open the groove width of 20cm deep 35cm width.The machine fertilizer uniformity up to 90%.The machine productivity reached 1.3 hm 2 / h. The machine which meets the requirements of rubber tree fertilization has stable performance. At the same time, the machine can be the human's workload.

In order to solve the problems of adhesion to soil and high resistance in traditional subsoiling shovel operation, a bionic energy-saving subsoiling shovel with bionic viscosity reducing and resistance reducing chisel is designed based on the polygon geometry structure of pangolin scales. In this paper, the bionic modeling analysis of chisel type energy-saving subsoiling shovel is carried out by using 3D modeling software. According to the simulation analysis data, we optimize the key structural parameters, and try to produce the bionic energy-saving deep scarifier with reducing viscosity and resistance. In order to study the performance of the chisel type energy-saving subsoiling shovel, L9 (34) orthogonal test was carried out in the field with the number of bionic surfaces, coating materials and forward speed as the experimental factors, and the adhesion soil amount and traction resistance as the test indexes. The results show that the order of influence of each factor on the index is the number of subsoiling shovel bionic surface, coating material and advancing speed; the optimal horizontal combination is that the number of bionic surfaces of subsoiling shovel is 10, the coating material is UHMWPE, and the advancing speed is 6km/h.

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