深松对干旱灌区玉米光合特性及产量的影响

Effects of Deep Scarification on Yield and Photosynthetic Characteristics of Maize in Dry Irrigated Area

通过对郑单958和通科1两个品种分别进行深松40 cm和30 cm处理,光合特性都有不同程度的影响,叶面积指数明显提高,玉米不同层位叶净光合速率均显著提高,深松40 cm处理的玉米不同层位叶蒸腾速率显著提高,气孔导度只有郑单958的上部叶和下部叶在深松40 cm处理增加显著,而胞间二氧化碳浓度只有通科1的穗位叶在深松40 cm处理降低显著,不同年份两个品种的产量都显著提高。说明深松促进了光合作用,提高了玉米产量,尤其深松40 cm处理效果明显。

After 40 cm and 30 cm deep scarification, photosynthetic characteristics of Zhengdan 958 andTongke 1 were both influenced to different degrees. Leaf area index increased significantly and leaf net photosynthet-ic rate of different positions were also significantly improved. Leaf transpiration rate of different positions under the40 cm deep scarification increased significantly, stomatal conductance of upper and lower leaves of Zhengdan 958 increased significantly under the 40 cm deep scarification treatment while ear leaf intercellular CO2 concentration ofTongke 1 reduced significantly under the 40 cm deep scarification treatment. Yields of the two varieties of differentyear both improved significantly, which illustrated deep scarification promoted the photosynthesis, increased yieldof maize, especially for 40 cm deep scarification treatment.