微咸水灌溉对小麦生理特性及产量的影响

Affects of Brackish Water Irrigation on Output and Physiological Characters of Wheat

在天津市静海县进行了微咸水安全利用技术试验,结果表明,灌溉微咸水有降低小麦光合速率、提高呼吸速率、蒸腾速率等效果,对生物产量、经济产量也有影响,而且不同的矿化度、灌溉量、灌溉时期影响不同。灌溉4.5 g/L微咸水较不灌水的生物产量和经济产量分别增加15%-40%和10%-30%。施用土壤调理剂能够明显改善小麦的生理性状,使灌溉微咸水小麦的生物产量提高10%-15%,经济产量提高10%-20%。

Field experiments of brackish water utilization technology were carried out in Jinghai county of Tianjin. The result showed that irrigating brackish water could decrease photosynthetic rate, enhance respiration rate and transpiration rate, so that affected the biological output and eco- nomical output of wheat,though it changed with the difference of water mineralization degree,ir- rigating quantity and irrigating period. Irrigating 4.5 g/L brackish water could increase the biological output and economical output by 15 %--40 % and 10%--30% respectively, comparing with no watering. Using soil amendment was able to improve obviously the growth properties of wheat,and enhance its biological output and economical output by 10 % --15 %/00 and 10%--20%, respectively.