玉米品种源库特性及与产量的关系

文章探讨了寒地玉米源库特点及其与产量的关系,试验选择了不同类型品种进行了减源限库处理。结果表明,品种间对减源和限库处理的反应存在差异。试验中采用的两个紧凑型玉米适于密植,尤其是DH808具有保绿特点,表现出源供应能力强而库调动光合产物能力弱的特点。两个平展型品种不耐密植,尤其是四单19的叶面积下降较快,而籽粒调动光合产物的能力较强。源库性状改变均影响玉米产量。

Relationship between yield and source-sink characteristics of maize cultivars

The traits of resource and sink of maize in cold-region and their relationship with yield were discussed in this paper.Different type cultivars were planted with treatment of source-reducing or sink-limiting. The results indicated that reaction is different among the cultivars in the treatment of source-reducing and sink- limiting.The cultivars of upright-leaf type are suitable close-planting,especially DH808 has the characteristics of"stay green"in maturity;it means that the ability of source is strong,but the redistribution ability is weak during kernel filling.The cultivars of horizontal-leaf type are not suitable for close-planting,especially the LA of Sidan 19 declines relative rapidly,but the ability of dry matter redistribution is relatively strong.Source and sink traits all affect the yield of maize.