营养液溶氧浓度对黄瓜和番茄根系呼吸强度的影响

Effect of Dissolved Oxygen Concentrations in Nutrient Solution on the Respiratory Intensity of Cucumber and Tomato Roots

在不同溶氧浓度 (DO)营养液中生长 3d的黄瓜和番茄根系的呼吸强度均随DO的降低而降低 ,黄瓜的降低程度小于番茄 ;处理后第 6天 ,在 1和 2mg/LDO下生长的根系呼吸强度有所增大 ,黄瓜的增大程度大于番茄。

The respiratory intensity of cucumber and tomato roots grown at various dissolved oxygen(DO)concentrations of nutrient solution was determined.The results indicated that the respiration rates of the two crops were decreased with decreasing DO concentrations at 3d,but the decrement in cucumber was less than that in tomato.In the treatments of 1 and 2mg/L DO,however,the root respiration intensities were greatly increased in both cucumber and toamto at 6d,and the incrember in cucumber was larger than in tomato.