New Knapsack Type Airflow Rice Seedling Machine Agronomy Complementary Technology (2) 3. Agronomic Technical Requirements The new type of Knife Rice Seedling Throwing Machine has a relatively high agronomic and technological requirements, and the main techniques are divided into two parts: breeding seedlings and flattening fields. (1) Technical Requirements for Seedlings Different from seedlings used for transplanting seedlings, seedlings used in seedling throwing machines must be planted with seedlings in apical plastic trays. Whether the seedlings meet the technical requirements of the thrower will directly affect the quality and efficiency of the dumping. Therefore, we must combine agronomic and agricultural machinery closely and organically, and cultivate qualified seedlings. 1 Settlement: Ample stocks are the basis for Daejeong’s casting. The current production of plastic floppy disk specifications have 561 holes, 434 holes and 353 holes in three specifications. Generally, 434 holes are more suitable. Each acre requires 45 to 50 plates, and 561 holes require 40 to 45 plates per acre. 2 seedling height: generally a three-leaf core, the suitable height is within the range of 80 ~ 200 mm, the age of 20 to 25 days is more appropriate. 3 Seedlings soil moisture content: should be 40% -60%, with your fingers not crushed is appropriate. Note that the day before throwing, you must not water the Dianchi Lake to prevent the humidity from getting too large and the clay from sticking to the dumping plate. 4 seedlings with mud: seedling root with mud, mud must have a certain viscosity, muddy root formation, easy to throw up and seedlings mud upright, there is no string root between seedlings group, to each other not adhesion. 5 seedling quality: dark green leaves, robust, uniform growth, white root winding, no disease, and with 1 to 2 tillers, but flexible. (2) Technical requirements for Daejeon Fields after soaking should be ploughed, smashed, ground, leveled, and buried in straw (grass), so that the fields are flat, muddy, muddy, and inchless. In the "claw" water state, the surface of the field is muddy. 1Before throwing, according to the type of soil, the ploughed field should be precipitated for 1 to 2 days. Generally, the sedimentation of the sandy loam field is 1 to 1.5 days, the black clay is precipitated for 2 to 2.5 days, and the Huangmian Pakta is precipitated for 1 to 2 days. If the seedlings are thrown into the field without sedimentation, the seedlings will be sucked into the mud with the living mud, affecting the seedling growth and low tillering. 2 Daejeon water depth is generally 1 to 3 centimeters, that is, the best is that the water is not exposed to mud. The water is too deep and it is easy to fly. The water is too shallow and the roots are easily dried by the sun. Therefore, the management of Putian Water is also critical. 3 After the seedlings have thrown people into the field, they usually stand upright within 2 to 4 days. When other factors occur (such as falling asleep) in the field, artificial remedial measures can be taken. Manually applying the bamboo shoots with a diameter of 1.5 to 2.5 cm and a length of 3 meters along the air passages to straighten the seedlings can prevent the seedlings from hanging. Sleeping, helping the seedlings take root and turn green. (Xixiang, Shanxi Agricultural Machinery Management Station, Xixiang County, Shaanxi Province 723500)
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