Agricultural tractor machinery deep loosening technology can break the hard plow bottom, thicken the loose soil layer, and improve the structure of the soil plowing layer without overturning the soil and disturbing the original soil structure. Waterlogging capacity can effectively improve the soil, increase the basic production capacity of crops, and promote agricultural production and farmers' income. China continues to promote the deep loosening of agricultural tractor.
1. Implementation area
The arable land area suitable for deep pine preparation for agricultural machinery in China is about 574 million mu. It is mainly distributed in the first mature area in Northeast China, the two mature areas in Huanghuaihai, the sandy areas along the Great Wall, the northwest Loess Plateau area, the northwest oasis agricultural area, the southern dryland planting area, There are seven types of regions including the southern sugarcane region.
The soil texture of the subsoil operation method is mainly clay and loam. Due to the long-term use of rotary ploughing and ploughing operations, the plots of the bottom layer of plough should be submerged. When the soil bulk is greater than 1.4 grams per cubic centimeter, and it affects the growth of crops, deep loosening site preparation operations should be carried out in a timely manner. The soil moisture content suitable for deep loosening is generally 12% to 22%. For sandy soil plots and paddy fields below 20 cm, it is not suitable to carry out deep loosening site preparation operations.
2.Equipment selection
There are various types of subsoilers, which can be divided into two types: interval subsoilers and omnidirectional subsoilers according to the operation form. According to the operation function, it can be divided into two types: single subsoiler and double operation machine. Single subsoiler can be divided into It is a vibratory and non-vibrating subsoiler, and the compound operation machine can complete many operations such as stubble stubble, rotary tillage, subsoiling, fertilization, seeding, and soil covering. Non-vibration type subsoilers are more common, and are mainly divided into five types: chisel type, arrow-shaped shovel type, wing shovel type, all-round, and offset column type. Different localities can choose different types of subsoilers according to local soil types and operating methods.
The interval subsoiler is also called an inter-row subsoiler. It uses a shovel handle and a shovel tip with strong penetration performance to penetrate the soil, so that the soil is lifted, lowered, and loosened, while breaking through the bottom of the plow. In order to expand the depth of the soil layer, a double-wing shovel can be installed on the deep shovel. After the interval is loosened, a plow layer structure coexisting with the virtual and solid forms, and the imaginary part keeps water and the real part raises water. This type of subsoiler can adjust the interval of the subsoiler according to the actual production, and the working resistance is small. The average power required for each subsoiler is about 30 horsepower, and a tractor with corresponding horsepower should be equipped.
The omni-directional subsoilers mostly use "V" blade parts. During the cultivation, the trapezoidal section soil purlin is cut from the bottom of the soil layer, and it is lifted, moved backward, and dropped, so that the soil purlin can be broken. The offset column type subsoiler uses an offset shovel to expand the tillage range of the soil. The effect is similar to that of an all-round type subsoiler. These two types of deep loosening equipment have the characteristics of large range of soil loosening and good effect of crushing soil, but have large power consumption and should be equipped with tractors with large horsepower.
Vibration type tractor subsoiler is mainly divided into two types: drive type and self-excitation type. The driven vibration subsoiler uses the tractor's power output shaft to drive the subsoiler, which is loosened while vibrating, thereby reducing the tillage resistance. A self-excited vibration subsoiler is a spring with a certain pre-tension on the subsoiler, which compresses and stretches the spring to cause the subsoiler to vibrate. This type of subsoiler has a complicated structure and high cost, but can reduce power and power consumption. The average power required for each subsoiler is about 25 horsepower, and a tractor with corresponding horsepower should be equipped.
Duplex tractor working machines include shallow turning subsoilers, rotary tilling subsoilers, straw returning subsoilers, no-till seeding subsoilers, and rotary tilling subsoil fertilizing combined soil preparation machines that can complete two or more operations simultaneously Rotary tillage deep pine ridge combined land preparation machine, stubble deep pine cracker combined land preparation machine, etc. Some large-scale combined soil preparation machines are used in conjunction with high-power tractors, which can simultaneously complete multiple operations such as stubble crushing, shallow plowing, deep subsoil, leveling, and cracking of crushed soil. Duplex working machines have the characteristics of high production efficiency and one machine for multiple purposes, but they have large power consumption and should be equipped with tractors with large horsepower.