源库比改变对玉米生育后期茎鞘贮存物质含量及产量的影响

通过对吐丝授粉期两种密度条件下的两个不同类型玉米品种剪1／2叶、剪1／2穗和断1／2根的研究发现：剪叶、断根减源后植株体内可溶性糖浓度下降2．19％～38．6％，剪穗缩库后可溶性糖浓度上升23．17％～38．5％，而单株生产力降低4．1％～40．94％。试验表明：玉米产量的形成与源库关系的协调性有关。

Effect of alteration of source-sink ratio on stem-sheath reserve substances in later growth period and yield of maize

Through the treatments of cutting half leaf, cutting half spike and splitting half root of two different type maize (Hudan 4 and Shaandan 902) under two different density (45 000 plants/hm~2 and 75 000 plants/hm~2) during silk-pollinating stage. The result showed that the soluble sugar content of plant has reduced by 2.19%~38.6% through cutting leaf and splitting root, and that increased by (23.17)%~38.5% through cutting spike, but the single plant productivity reduces of about 4.1%~40.94% have been demonstrated. It suggested that the yield of corn was related to the harmony of source-sink.