喷灌条件下不同节水措施对玉米的影响

在宁夏中部干旱带采用起垄覆膜、无垄覆膜、起垄无膜、秸秆覆盖和对照(常规种植)进行玉米生育期、产量、叶绿素含量、光合速率、蒸腾速率、水分利用效率以及土壤水分含量等进行调查研究,结果表明:覆膜可使玉米提早成熟10 d以上,并可提高玉米的产量、保苗率,成穗率,使玉米的产量比对照提高25.7%～30.7%.影响叶绿素含量的主要是玉米各生育时期与玉米叶片的不同部位,影响最大的是叶片中部,其次是叶片基部.起垄可提高水分利用效率,起垄覆膜可促进玉米的光合速率.

Effects of Different Water-saving Measures to the Corn under Sprinkler Irrigation Condition

The different treatment measures such as effects of covered ridge,non-covered ridge,a ridge film,straw mulch and control (conventional cultivation) were investigated and studied on growth period,p ro ductio n,chlorophyll content,photosynthetic rate,transpiration,water use efficiency and soil moisture content on corn in central arid zone of Ningxia. The results showed that:covered corn will mature 10 days earlier and above,and increase the output of maize,keep a full stand of seedlings rate, a spike rates and to make the corn yield higrer than the control 25.7%~30.7%.The main impact of the chlorophyll content of the corn and corn growth stages in different parts of the leaves,the greatest impact is the central of the leaves,followed by the leaf base. Ridge can improve water use efficiency, covered ridge can promote the photosynthesis of corn.