不同覆膜方式对冬小麦光合特性和增产潜力的影响

Influence of Different Ways of Plastic Covering on the Photosynthesis Property and Yield Increasing Potential in Winter Wheat

以晋麦４３号为材料，对３种覆膜条件下，旱地冬小麦产量及光合特性的研究表明：不同覆膜方式下其产量为地膜穴播＞条播盖苗＞膜侧条播＞露地条播（对照）。覆膜处理的净光合速率及气孔导度高峰期比对照提前，地膜穴播和膜侧条播小麦增产潜力大，灌浆期的净光合速率下降慢，蒸腾速率、气孔导度、灌浆速度等生理指标都显著高于条播盖苗和对照。

With winter wheat as the test material,the yield and photosynthesis properties of flag leaf on winter wheat were studied under three different mulching conditions.The results indicated that,the yield order from high to low was plastic dropping in hill,drill seeding covering,drilling beside plastic film and open drill seeding.The peak of photosynthetic rate with all plastic covering came earlier than control.Yield increasing potential of wheat with plastic dropping and drilling beside plastic film was bigger.The photosynthetic rate decreased slowly in grainfilling period.The physiological characters such as transpiration rate,stomatal conductance were obviously higher than drilling seeding,covering and control.