论文部分内容阅读
一、造成芹菜空心的原因 1.保护地栽培,如果温度太低,光照不足或受冻害,致使叶片光合同化作用减弱,并使根系对养分、水分的吸收运转受阻而产生空心。 2、露地栽培遇高温干旱是造成空心的主要原因。夏季昼夜温差过小,呼吸消耗较多,如果土壤水分供应不均匀,芹菜生长过程中生理缺水会抑制根部对各种元素的吸收输送,不仅影响顶芽生长,还使叶柄中厚壁组织加厚,髓部和输导
First, the causes of celery hollow 1. Protected cultivation, if the temperature is too low, the light is insufficient or frost damage, resulting in weakening of the role of photosynthetic leaves, and the roots of nutrients, moisture absorption operation blocked and produce hollow. 2, open field cultivation encountered high temperature and drought is the main reason for the hollow. Summer temperature difference between day and night is too small, more respiratory consumption, if the soil water supply is not uniform, physiological growth of the celery will inhibit the absorption of various elements of the root of the water supply and transportation, not only affect the top bud growth, but also the petiole in the thick wall plus Thick, medullary and transfused