In long-term rainy weather, what problems should be paid attention to in order to cultivate good seedlings?

1, seedling planting technology is directly related to the growth of seedlings after planting, which is an important link to ensure the whole seedling and early development. Therefore, diseased seedlings, weak seedlings and seedlings with damaged roots due to containers should be eliminated when planting, and then the seedlings should be divided into 2 ~ 3 grades according to their growth conditions, so that the field growth is consistent and management measures should be taken respectively.

2. The suitable time for planting in the open field must be after the local final frost, with the temperature stable at 65438 08℃ and the soil temperature stable at 65438 05℃. According to the meteorological data over the years, the nightingale also considered the weather conditions when planting. Sunny planting should be selected according to the weather forecast. In sunny days, the soil temperature is high, and new roots are easy to appear after planting, and the emergence of seedlings is delayed quickly.

3. In addition, it depends on the growth state of seedlings. For example, the planting season in the field is approaching, the weather is fine, the seedlings grow well, and the roots begin to stick out the nutrition bowl. When seedling management is already difficult, we should seize the favorable opportunity of sunny days to sow in time; If the growth of seedlings is still small, there is no crowding in the middle, and the roots do not protrude out of the pot, even if the season has arrived and the weather is fine, transplanting can be postponed, because the climatic conditions of seedbed are conducive to growth and centralized management, and proper late planting is more beneficial than early planting.

4. Before planting, the seedbed should be properly cooled and exercised to adapt to the field conditions. Nitrogen fertilizer can be applied once, and preventive medicine can be sprayed once, so that fertilizer and medicine can go hand in hand and make preparations before planting.

5. The general requirement of field planting is that the roots are not damaged during operation, and the clods are closely combined with the field soil to accelerate the growth of melon seedlings.

2. Seedlings cultivated in plastic bowls, paper bowls or nutrient clods.

Seedlings cultivated in plastic pots, paper pots or nutrient clods can keep their roots intact. When transplanting, as long as the weather is fine and the soil humidity is suitable, it can be planted in the morning or afternoon. If the labor force is tight, there is no problem without watering on the day of planting. Pay attention to the following points when operating.

1, when using plastic pots to raise seedlings, you should avoid breaking and damaging the roots. When transplanting paper pots, if the soil temperature in the field is high and the paper pots are easy to rot, there is no need to tear the paper pots. If the soil temperature is low, it is necessary to tear the paper pots at the bottom and around to make the roots extend faster.

2. When planting, the soil in the seedling pot should be in close contact with the soil in the field to avoid overhead. Therefore, the planting hole should be dug bigger and deeper, and the soil in the hole should be fully compacted. Never crush the nutrition pot. If the seedling pot is operated rudely, it is easy to cause stiff seedlings.

3. The planting depth is suitable. Generally speaking, the basin soil is buried in the soil around 1cm. If the soil is planted too deep, the temperature of the soil will not rise easily, and the air permeability of the soil will be poor, which will affect the growth of the root system. If the soil layer is too shallow, the soil temperature is high and the air permeability is good, but the soil moisture is low, which is not conducive to root growth.