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花卉种子在育苗过程中,由于多种原因,往往达不到理想的出苗率和整齐度,出现通常所说的出苗障碍。出苗障碍大致可分为不出苗、出苗率低、出苗不整齐或籽苗戴帽出土、死苗等几种类型。造成花卉种子出苗障碍的原因,主要有以下几个方面:一、种子原因种子原因是种子出苗障碍的内在原因,当种子某些性状未达到要求时,必然直接影响到出苗效果,一般有以下几种情况:1.使用未成熟种子。其胚发育不完全,种子在萌发时营养不足。2.使用陈种子。当种子超过使用寿命时,其发芽率会降低;有时即使未超过其使用寿命,种子保存时间过长,种子出土能力也会降低,出现戴帽出土的现象。3.种子遭受病虫害。如果种子在
Seedlings of flowers in the breeding process, due to a variety of reasons, often do not reach the desired emergence rate and uniformity, the emergence of the so-called emergence of barriers. Emergence disorders can be broadly divided into non-emergence, emergence rate is low, uneven emergence of seedlings or hats unearthed, dead seedlings and other types. Seedlings caused by the reasons for seedling barriers, mainly in the following areas: First, the seed reason The seed is the seed causes of seedling barriers to the internal causes, when some of the traits of seed does not meet the requirements, will inevitably have a direct impact on the emergence of the effect, there are generally the following The situation: 1. Use of immature seeds. The embryo is not fully developed, and the seeds are undernourished during germination. 2. Use Chen seeds. When the seeds over the service life, the germination rate will be reduced; sometimes even without exceeding their useful life, seed storage time is too long, the ability to unearthed the seeds will be reduced, the phenomenon appeared wearing hats. 3 seeds suffer pests and diseases. If the seed is in