高产春玉米叶片物质生产能力研究

The Study of the Material Production Ability of Leaf of High-yield Maize

以金山27为试材,当地普通农户栽培模式为对照,研究超高产春玉米叶片物质生产能力,结果表明:高产春玉米较普通农户LAI大,尤以棒三叶以下叶片的LAI差异最大.净光合速率拔节期小于普通农户,吐丝期和乳熟期均大于普通农户.群体光合势全生育期都大于普通农户,吐丝到乳熟期差异最大.高产春玉米产量极显著高于普通农户,产量构成因素中,有效穗数极显著大于普通农户,穗粒数和千粒重略低于普通农户.

Using main cultivated JinShan27 as test material and ordinary households maize as the control,we analyzed the material production ability of leaf of high-yield maize.The results showed that Leaf area index of high-yield maize was higher than control,and difference was obvious in bottom leaf.The net photosynthetic rate of high-yield spring maize was lower than control in Jjointing,which was contrary in Silking and Milking.Population leaf area duration（LAD） of high-yield maize was higher than control in the whole growth period,and which was maximum form Silking to Milking.The yield of high-yield maize was extremely significant higher than control,The number of productive ear was extremely more in Production factors,and Grain number per spike and 1000-grainweight was lower than control.