滴灌中不同灌水上限对梨树生理生长、光合特性及品质的影响

Effects of Different Irrigation Quantity Upper Limit on Physiological Growth,Photosynthetic Characteristics and Quality of Pear Trees Under Drip Irrigation

为进一步给山西省干旱、半干旱地区的科学灌溉提供理论依据,进行了不同灌水上限对玉露香梨树生理生长、光合特性及品质的影响的研究。试验以同一灌水下限60%,不同灌水上限70%、80%、90%,设置3个水平处理,以地面灌溉作为对照开展。结果表明:不同灌水上限对玉露香梨的新梢生长量、干周增长量、光合特性及品质均有不同程度的影响,综合分析各项指标得出:滴灌条件下处理2,即灌水下限为60%田间持水量,灌水上限为80%田间持水量时,更适宜玉露香梨树的生长。相比地面灌溉,滴灌可以有效节约水资源,减少环境和果品污染,大大提高了果农的经济效益,进而推动果品产业可持续发展。

In order to provide theoretical basis for scientific irrigation in arid and semi-arid areas of Shanxi Province,the effects of different irrigation upper limit on physiological growth,photosynthetic characteristics and quality of Yulu fragrant pear were studied.Three level treatments,namely upper limit as 70%,80%and 90%of field capacity,were set for the same irrigation lower limit as 60%of field capacity,and ground irrigation was selected as a contrast.The results showed that different irrigation upper limit had different effects on shoot growth,trunk girth growth,photosynthetic characteristics and quality of Yulu fragrant pear.Based on the comprehensive analysis of all the indexes,it was concluded that under the condition of drip irrigation,treatment 2 was more suitable for the growth of Yulu fragrant pear trees when the irrigation lower limit was 60%of the field water capacity and the irrigation upper limit was 80%of the field water capacity.Compared with surface irrigation,drip irrigation can effectively save water resources,reduce environmental and fruit pollution,greatly improve the economic benefits of fruit farmers,and thus promote the sustainable development of fruit industry.