一、造成空心的原因1.在保护地栽培,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.在露地栽培,遇到高温干旱是造成空心的主要原因,特别是夏季昼夜温差过小、呼吸消耗较多,如果土壤水分供应不均匀 First, the causes of hollow 1. In the protective cultivation, if the temperature is too low, the light is insufficient or frost damage, resulting in weakened photosynthesis leaves, and the roots of nutrients, moisture absorption blocked operation and produce hollow. 2. Cultivation in the open field, encountered high temperature and drought is the main cause of hollow, especially in the summer day and night temperature is too small, more respiratory consumption, if the soil moisture supply is not uniform