MySheen

How to prolong the rice seedling age and prepare for drought resistance and rain planting?

Published: 2024-11-21 Author: mysheen
Last Updated: 2024/11/21, In normal years, the seedling age of machine transplanting is about 30 days, that of throwing seedlings is about 40 days, and that of water raising seedlings is about 50 days. If the planting water comes late, it will be faced with extending the seedling age to more than 60 days in order to wait for the seedlings to be planted in water. First, sparse sowing to cultivate long-aged and strong seedlings. That is to say, by expanding the area of seedling bed, reducing the sowing amount per square meter and prolonging the lag tillering period of seedlings, the age elasticity of early sowing seedlings can be effectively increased, the seedling quality can be improved, and the per unit yield can be improved. it can also solve the contradiction of anhydrous transplanting in the early stage.

In normal years, the seedling age of machine transplanting is about 30 days, that of throwing seedlings is about 40 days, and that of water raising seedlings is about 50 days. If the planting water comes late, it will be faced with extending the seedling age to more than 60 days in order to wait for the seedlings to be planted in water.

First, sparse sowing to cultivate long-aged and strong seedlings. That is, by expanding the area of seedling bed, reducing the sowing amount per square meter and prolonging the lag tillering period of seedlings, the elasticity of seedling age of early sowing seedlings can be effectively increased, the seedling quality can be improved, and the per unit yield can be improved. it can also solve the contradiction of anhydrous transplanting in the early stage. The thinner the sowing is, the more elastic the seedling age is. If other management cooperates well, the seedling age of dry-raised seedlings can exceed 70 days.

The second is chemical regulation to prolong the seedling age. On the basis of dry cultivation and sparse sowing, paclobutrazol was sprayed 1 to 2 times after 3 leaves, and 50 kg of 15% paclobutrazol wettable powder was evenly sprayed with 50 kg of water per mu (in principle, according to the concentration of 150PPM) to promote tiller and control growth. Under the same circumstances, the seedling age can be extended by more than 10 days.

The third is to plant seedlings in two stages. For the nursery bed with normal sowing time and large sowing rate, if we want to wait for water-planted seedlings and the seedling age is more than 60 days, we should prolong the seedling age by two-stage posting. When the seedling grows to 2 leaves and 1 heart, the seedlings are planted according to row spacing 6-10cm and nest spacing 5-8cm. 15% paclobutrazol was sprayed on each mu of rice seedlings 2 to 3 days after posting, and if the seedling age was more than 70 days, the same method was applied again after 15 days to cultivate long-aged and multi-tiller strong seedlings.

 
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