When does rice transplant? What are the methods? What should I pay attention to?

Transplanting refers to planting seedlings in paddy fields, or transplanting rice seedlings from seedling fields to paddy fields. So when is rice transplanting? What are the methods? What should I pay attention to? It is learned from Li Jianhui, a rice grower, that the sowing time of early rice is sowing and transplanting in the middle of April, transplanting in early May, harvesting in late July, followed by transplanting of late rice immediately (called double rush), which generally must be finished before the beginning of autumn, and harvesting of late rice from late October to November.

What are the rice transplanting methods?

1. The most important thing in hand transplanting is transplanting depth. Generally, if the transplanting depth exceeds 5 cm, there will be few tillers at low nodes, and almost no tillers after 7 cm. Therefore, the paddy field water during transplanting should not be too deep to the extent that the land is not exposed. The hardness of the ground becomes the key to ensure the quality. If the ground is too soft, even if the transplanting is shallow, the seedlings will sink down due to their own weight after transplanting, and they will also be planted deeply; if the ground is too hard, it is easy to float after transplanting. Another is transplanting, the fingers touching the ground are preferably two fingers, and not inserted downward, should be attached horizontally, so that you can ensure shallow insertion while ensuring that seedlings do not float.

2. The standard of machine transplanting is to transplant rice seedlings in Wang Ni Wang water without affecting the seedlings that have been planted when the transplanting machine is used. The seedling emergence of plate seedlings is uniform and the four sides are neat, which can effectively reduce the empty planting rate. When transplanting rice, leave the rice field around the width of a transplanter, transplant rice from the outside to the inside, and finally insert the rice field around the outside. After transplanting, when supplementing seedlings, adhere to the principle of "no supplement if there are seedlings, one hole if there are two missing trees, and no supplement if there is one hole missing". When the seedlings of hybrid rice lack a hole, it has little effect on the yield. Don't make up too much.

3. The seedlings for throwing seedlings should be prepared by about 10% more than those for hand transplanting. Throwing time is the key to success or failure. If the ground is too soft, the seedlings thrown too deep will affect tillering; if the ground is too hard, the seedlings thrown shallow will easily lodge. The suitable time of seedling throwing is that the root of seedling enters into soil 2 cm as standard. When throwing seedlings, you cannot throw them horizontally. You should throw them 3-5 meters high in the air and let the roots fall upright to the ground. After throwing seedlings every 5 miles a 30 cm wide operation channel, the seedlings of the operation channel are thrown to the place where the seedlings are sparse, and the density of rice seedlings in the whole field is sorted out, so as to achieve the same density of thrown seedlings as far as possible.

What should rice transplanting pay attention to?

1. Climatic conditions, variety characteristics, and the connection between crops before and after rice sowing. Generally speaking, wet seedlings can be sown when the average temperature of three consecutive days is stable through 12℃, and dry seedlings or dry seedlings can be sown when the temperature is stable through 10℃. Rice sowing time in flat dam, shallow hill and river valley areas below 400 meters above sea level should be from late February to March 5; rice sowing time in deep hill and low mountain areas above 400 meters above sea level should be from March 6 to 15, and in mountain areas no later than March 20, so as to seize the sowing time of cold tail and warm head of rice.

2. In the rice seeding and seedling stage, low temperature freezing damage is easy to cause large-area damage to rice. Rice seedlings will be yellowed, withered and withered to varying degrees due to freezing damage, and seedlings will be lacking in the field. Pay close attention to the weather forecast before and after the occurrence of freezing damage. Spray Tianda 2116 on the leaves 2-4 days before the arrival of low temperature for prevention. After freezing, use Tianda 2116 and hymexiline to repair the frozen seedlings in time, and also make up the seedlings as soon as possible.