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新疆石榴广泛采用匍匐方式栽培,采用双层双扇形整形修剪后,匍匐石榴产量大幅度上升,果实品质明显提高。实验以千籽红石榴为材料,通过对光照强度、温度、树冠内CO2浓度(Ci)、水分利用效率(WUE)、光合有效辐射(PAR)和光合速率(Pn)测定,从光合特性的角度对双层双扇形整形修剪技术进行了评价,并且为新疆石榴的整形修剪技术提供理论依据。结果表明,在新疆南部地区,光补偿点为57μmol/m2.s,石榴光饱和点约为1 500μmol/m2.s;35℃左右时光合速率(Pn)最高,CO2补偿点为72μL/L,饱和点约为1 000μL/L。匍匐石榴采用双层双扇形整形修剪后,明显改善了树冠内的通风透光,水分利用效率(WUE)、树冠内CO2浓度(Ci)、树冠内光合有效辐射(PAR)和树体光合速率(Pn)都明显优于对照。
Xinjiang pomegranate widely cultivated using creeping methods, the use of double-double double-shaped plastic trim, the yield of prostrate pomegranate increased significantly improved fruit quality. The experiment was carried out on the basis of photosynthetic characteristics of Thunbergii pomegranate seedlings by using light intensity, temperature, CO2 concentration inside the canopy (Ci), water use efficiency (WUE), photosynthetically active radiation (PAR) and photosynthetic rate The double double quadrant trimming technique was evaluated and the theoretical basis was provided for the plastic pruning technique of Xinjiang pomegranate. The results showed that the light compensation point was 57μmol / m2.s and the light saturation point of pomegranate was about 1500μmol / m2.s in the southern part of Xinjiang. The highest Pn and the CO2 compensation point were 72μL / L at 35 ℃, The saturation point is about 1 000 μL / L. Creeping pomegranate with double double quadrant pruning significantly improved the ventilation and water vapor permeability, water use efficiency (WUE), CO2 concentration in canopy (Ci), photosynthetically active radiation (PAR) in crown and photosynthetic rate Pn) were significantly better than the control.