A Seedling Raising Method for Improving Pittosporum Salt Tolerance

Abstract

The invention discloses a seedling cultivating method for improving salt-resistance performance of pittosporum tobira. The method comprises the steps that seeds produced by nursery stock which is native to the seaside are selected; salt-resistance exercising is conducted starting from the seeds, during small seedling period, namely, the period when 5-10 leaves are grown from the seedlings, small seedling period exercising is conducted on small seedlings, during big seedling period, namely, the spring of the next year, big seedlings are transplanted into nutritional bags, and salt-resistance exercising of big seeding period is conducted when the big seedlings begin to grow and growth of buds is over, wherein a salt-resistance exercising circle of the big seedling period is at least over four month. According to the seedling cultivating method for improving the salt-resistance performance of the pittosporum tobira, in the three stages of seeds, small seedlings and big seedlings, after domestication is conducted on the nursery stock according to different domestication schemes, when the nursery stock is planted in coastal areas, the survival rate and the growth vigor of the nursery stock are both as good as that of the nursery stock planted in the inland areas. During seed soaking, the germination percentage of the seeds reach 90%-95%, the survival rate of the nursery stock during small seedling planting reaches 90%-95%, the survival rate of the nursery stock during big seedling planting reaches 90%-95%, and the survival rate of the big seedlings after the nursery stock is moved out of a nursery and planted in the coastal areas can reach over 95%.

Description

technical field [0001] The invention relates to a seedling raising method of Pittosporum, in particular to a seedling raising method for improving salt tolerance of Pittosporum. Background technique [0002] Salt mist refers to a diffuse system composed of tiny salt-containing droplets in the atmosphere. Salt mist is easy to attach to the leaves of seedlings and cause great damage to seedlings. It is easy to cause dry yellow leaves and yellow spots, resulting in sickness of seedlings and serious damage. Will cause the seedlings to die. The salt spray hazard in coastal areas is much higher than that in inland areas. Therefore, when planting garden seedlings in coastal areas, it is necessary to consider the salt tolerance of the plants and the salt spray tolerance of the seedlings when selecting seeds. The soil salt tolerance and salt spray tolerance of existing coastal seedlings are basically the result of natural survival of the fittest, which results in a small number of p...

AI Technical Summary

Problems solved by technology

The soil salt tolerance and salt spray tolerance of the existing coastal seedlings are basically the result of natural survival of the fittest, which results in a small number of plants and a variety of varieties, making it difficult to plant on a large scale

The demand for wind-resistant and salt-tolerant plants in coastal garden projects is more, and some wild salt-tolerant plants cannot meet the needs of garden construction, and the survival rate of seedlings cultivated by ordinary cultivation techniques is extremely low in this area. Its growth is also difficult to meet the requirements, causing relatively large troubles to the construction of coastal garden projects