Recently, the Ministry of Agriculture's mechanized advancement action expert guidance group and the Ministry of Agriculture's Agricultural Machinery Promotion Center issued the "Guiding Opinions on the Full-range Mechanization of Early Rice Production (Trial)". For the early rice mechanical transplanting link, opinions were put forward in three aspects.
(a) preparation of seedlings
According to the machine insertion time and schedule, it is required to bring along the shipment.
When smashing, start with a small amount of root system through the hole in the bottom of the disc, and then lift it with the smasher, then lay it flat, and then carefully remove the seedling from the coil, advocate the use of seedling trays and transport rakes.
When the seedlings are transported to the field, they should be unloaded flatly to allow the seedlings to stretch spontaneously; they should be transported along with each other, minimize the number of hoe block moving, and avoid the deformation and breakage of squeezing seedlings, stumbling blocks during transport. seedling.
The seedlings to be transplanted to the fields should be protected from the sunburning seedlings in the hot sun. Shady measures should be taken to prevent the seedlings from losing water and withering.
(B) Mechanical preparation
Before transplanting, check and adjust the transplanter, adjust the planting spacing, picking amount and planting depth of the transplanter. Lubricate the rotating parts and carry out idling for 5 to 10 minutes. All the moving parts of the transplanter are required to rotate. Flexible, no jamming, ensure the rice transplanter can work normally.
Before mounting the seedlings, the crucible box should be moved to one end of the guide rails, and then the seedlings should be installed to avoid leakage. The rake block should be close to the trunk, not arched, and the joints of the two rake blocks should be aligned without leaving gaps. If necessary, the rake block and the rake box should be sprinkled and lubricated to make the rake block slide smoothly.
(III) Machine insertion requirements
According to early rice varieties, planting seasons, and planting disc specifications, we choose suitable types of rice transplanters and promote the use of high-speed transplanter operations to improve work efficiency and planting quality. A narrow row (25 cm) rice transplanter can be used. Machine inserting requirements planting seedlings evenly, consistent depth, general leakage plugging rate ≤ 5%, the rate of scarring ≤ 4%, floating rate ≤ 3%, transplanting depth of 1 to 3 cm, suitable for shallow planting, is conducive to low section Bit delivery.
According to the early rice varieties and planting seasons, select suitable planting density. Conventional rice plants are 12 to 16 cm long, 4 to 6 per hole, planting density of 1.7 to 22,000 holes per mu; hybrid rice plants are 14 to 17 cm, 2 to 3 plants per hole, and planting density is 1.6 to 2 million holes per mu. It is recommended to use synchronous deep fertilizing transplanter operations.
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