不同熟期玉米套作夏玉米可溶性糖含量与产量形成

试验以早、中、晚熟代表品种鲁原单14(LD14)、掖单22(YD22)和掖单13(YD13)为对象,两两相互套作,研究春夏玉米套种体系中夏玉米可溶性糖含量与产量形成的关系.研究结果表明,不同时期各器官的可溶性糖含量与经济产量之间有明显的相关关系.其中,全株可溶性糖含量在大口期、吐丝期与产量成显著负相关,乳熟期、成熟期则与产量成显著正相关:叶片中的可溶性糖含量,吐丝期与产量成正相关,乳熟期和成熟期成负相关;叶鞘与茎中的可溶性糖含量与产量的相关关系相同,均表现为:乳热期与产量成负相关,吐丝期与成熟期成正相关;

Relationship Between Soluble Sugars Content and Yield of Different Maturity Maize Cultivars Under Interplanting

This study was to investigate soluble sugar content (SSC) of different organs, yields of different maturity maize cultivars strip intercropping and the relationship between them. Three different cultivars were chosen: premature cultivar luyuandan14(LD14), medium cultivar yedan22 (YD22) and late maturity cultivar yedan13 (YD13). The experiment was conducted in 2000 in Shandong Agriculture University, China. It was split-plot design,three different cultivars were intercropped with each other. It was turned out that there were closely relationship between the SSC and yield. The SSC of whole plants were negative correlated with the yield at male tetrad stage and silking stage, but positive relative to the yield at milking stage and maturity. The SSC of leaves were positive correlated with yield at silking stage, but negative at milking stage and maturity. The SSC of stems and stalks were negative correlated with yield at milking stage, but positive at silking stage and maturity. The SSC of bract, spike-stalk and grain were positive related to the yield at milking stage and maturity. And there were some different trends between sole-cropping and intercropping autumn maize.