摘要
[目的]明确矮秆早熟高粱品种吉杂141在佳木斯地区的合理栽培密度。[方法]以吉杂141为研究对象，在大田生产试验条件下，采用平播的方式，设置15万、20万、25万、30万、35万株／hm2共5个栽培密度，研究不同栽培密度下，吉杂141的群体生理指标、产量及产量性状。[结果]随着栽培密度的增大，叶面积指数增加，叶绿素含量下降，群体光合势和总光合势增加，株高差异不显著，穗长、穗粗逐渐下降，生物产量上升，千粒重和单穗重下降。[结论]初步明确在佳木斯地区采用平播方式吉杂141最适栽培密度为20万株／hm2，产量可达9203．36 kg／hm2。
Abstract
Objective] To find the rational planting density of early maturing short-stalked new variety sorghum Jiza141 in Jiamusi Area. [Method] With Jiza 141 as the research object, field experiment was carried out.Five cultivating densities were designed, which were 150 000, 200 000, 250 000, 300 000 and 350 000 plants/hm2 .Under the different planting density, the population physiological index, yield and yield traits of Jiza 141 were researched.[Result] With the increase of planting density, leaf area index increased, chlorophyll content de-clined, population photosynthetic potential and total photosynthetic potential enhanced, plant height showed no significant differences; ear length and width gradually reduced, biological yield increased, 1 000-grain weight and single panicle weight decreased.[ Conclusion] It is preliminarily found that in Jiamusi Area, the optimal cultivation density of Jiza 141 is 200 000 plants/hm2; and the yield reaches 9 203.36 kg/hm2 .
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维普
万方数据