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以田间种植的河农 85 9和河农 32 6为材料 ,比较了需水特性不同的 2个冬小麦品种的光合性能和子粒产量。结果表明 ,叶片的光合速率一般以河农 85 9较高 ,但在刚灌水后的短时间内则以河农 32 6的光合速率较高 ;河农 85 9叶片光合速率受灌水的影响较小 ,在生育期间的变化较平稳 ,而河农 32 6灌水与不灌水的处理间光合速率差别较大 ,且光合速率的波动明显。从产量性状分析 ,开花后灌 1次水和不灌水的限水条件下以河农 85 9产量较高 ,表明其耐旱性较强 ,而开花后保证充分供水的湿润处理则以河农 32 6产量较高 ,且增产幅度较大。因此 ,河农 85 9适宜于在供水有限的条件下发挥其耐旱特性 ,争取较高产量 ,而河农 32 6可用于在供水充足条件下发挥高产潜力。
The photosynthetic characteristics and grain yield of two winter wheat cultivars with different water requirement characteristics were compared with the cultivated HeNan 85 9 and HeNong 32 6 in the field. The results showed that the photosynthetic rate of leaves was generally higher in HeNan 85 9, but the photosynthetic rate of HeNong 32 6 was higher in a short time just after irrigation. The photosynthetic rate of HeNan 85 9 was less affected by irrigation , And the changes were relatively stable during the growth period. However, the photosynthetic rate differed greatly between the treatments of HeNan 32 6 and non-irrigation treatments, and the photosynthetic rate fluctuated obviously. According to the analysis of yield traits, the yield of HeNan859 under the condition of water inflow after irrigation and without watering showed that the yield of HeNan 859 was high, indicating that it is more drought-tolerant, while wetting treatment after ensuring full water supply after flowering was based on HeNan32 6 higher yield, and a larger yield increase. Therefore, HeNan 85 9 is suitable for exerting its drought tolerant characteristics under limited water supply and striving for higher yield, while HeNan 32 6 can be used to realize high yield potential under sufficient water supply conditions.