Is sowing suitable before or after the rain?

First, seed treatment before sowing

1. Seeds that are generally easy to germinate can be soaked in cold water or warm water before sowing, and the water temperature should be controlled below 40 degrees to soften the seed coat or swell the seeds, and then sown, such as morning glory and trollius chinensis. Small seeds do not need to be soaked.

2. For seeds with hard seed coat, because the seed coat is hard, airtight and impermeable, methods such as cutting the seed coat and chemical treatment can be adopted. Seeds such as canna can be scraped with a file or a knife to let the water directly contact the cotyledons. Because cotyledons absorb water and swell, the hard exocarp can naturally rupture and germinate quickly.

3. Ultra-low temperature preservation and low temperature stratification (i.e. sand storage) are often used to treat seeds that need to be dormant under low temperature and humidity.

Second, the sowing date

Indoor potted flowers are usually planted when the weather gets warmer in spring. However, there are many kinds of indoor flowers. Some varieties that bloom in winter and spring are often sown in late summer and early autumn, and those with short growth period can also be sown in late autumn and early winter.

Extended data

Seeds are still alive after leaving the mother's body, but the life span of seeds of various plants varies greatly. Its life is not only related to its genetic characteristics and robustness, but also affected by environmental factors. Some plant seeds have a short life span, for example, the life span of Brazilian rubber seeds is only about one week, while that of lotus seeds is very long, ranging from hundreds to thousands of years.

The extension of seed life is of great significance to the seed preservation of excellent crops, that is, the seed life can be extended by using storage conditions.

The experiment shows that low temperature, low humidity, avoiding light and reducing oxygen content in the air are ideal storage conditions. For example, wheat seeds can only be stored for 2-3 years at room temperature, but at-10℃, the relative humidity is 30% and the water content of seeds is 4-7%, which can be stored for 13 years, while at-10℃.

The relative humidity is 30%, and the water content of seeds is 4-7%, which can be stored for 35 years. Many countries use low temperature, drying and air conditioning technology to store excellent seeds, which makes the preservation of improved seeds change from planting to storage, greatly saving manpower and material resources and ensuring the quality of improved seeds.

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