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1 造成高粱种子发芽率低的原因1.1 种子成熟度低由于高粱是喜温作物,对光照敏感而我国北方地区春季干旱严重,地温低,播种时间晚,种子出苗缓慢,使生育期延长,延迟抽穗易受早霜危害。同时,灌浆乳熟期遇上高温干旱,会造成种子发育过程中的生理障碍,营养运输转化受阻,受精后的子房在中途停止发育,胚乳生长停止或者匆匆完成发育过程形成高温逼热,使子粒干秕瘦
1 Causes of low germination rate of sorghum seeds 1.1 Low seed maturity As sorghum is a thermophilic crop, it is sensitive to light. In northern China, the spring drought is severe with low ground temperature, late sowing time, slow seedling emergence, prolonged growth period and delayed heading Easily affected by early frost. In the meantime, the high temperature and drought experienced during the milk filling stage will result in the physiological obstacle in the seed development process, the obstruction of the transformation of the nutrient transport, the stop of the ovary in fertilization, the stop of the growth of the endosperm or the rapid development of intense heat in the process of development The stems are thin and dry