不同灌溉制度对温室番茄光合特性的影响

Study on the Photosynthetic Characteristics of Tomato in Greenhouse under Different Irrigation Schedule

光合对植物生长有直接影响,是作物产量形成的基础,因此研究不同灌溉制度对温室番茄生理变化的影响,对于温室番茄生产有积极的意义。试验采用传统灌溉方式为对比,研究了温室番茄滴灌条件下的灌溉制度对其光合参数及水分利用效率的影响。结果表明:滴灌可以使温室番茄的净光合速率峰值提前,提高水分利用效率;番茄的气孔导度与净光合速率、蒸腾速率、水分利用效率显著相关;灌水量较低时,可以通过缩短灌水间隔来提高温室番茄的水分利用效率。

Photosynthesis has direct and significant effect on the growth and development of crop , and it is also the base of high yield. Therefore, it is significant to study the physiological change under different irrigation schedule to promote tomato production in the greenhouse. Through comparison between drip irrigation and traditional irrigation, the influence of drip irrigation schedule on physiological features and water using efficiency is studied. The results indicate that under the condition of drip irrigation, the peak of photosynthesis appears ahead, and the water utilizing rate of plants is improved; the stomatal conductance of tomato has significant correlation with net photosynthetic rate, transpiration and water utilizing rate; we can shorten the irrigation intervals while the irrigation amount is low to improve the water utilizing rate.