论文部分内容阅读
在不同密度和氮肥用量条件下研究了春玉米群体高产和超高产(12750～16000kg·hm-2)群体库及源库流综合调控措施。试验在吉林省梨树县进行 ,设3 ,6,9,12万株·hm -24个种植密度和0,180,360 ,540kg·hm -24个氮素处理。研究结果表明 ,群体粒数、穗粒重、百粒重可反映群体的库数量和质量 ,粒叶比可反映群体源与群体库的数量关系 ;对于以高密度和高肥水为基础的高产和超高产群体 ,提高群体粒数可同时克服库和流对产量的限制 ,是进一步提高产量的有效途径 ,而提高群体粒数的关键是减少籽粒败育 ;粒叶比随密度增加而下降 ,通过增加密度来扩库的同时 ,应适当降低源的增加幅度
Under different densities and nitrogen rates, the comprehensive control measures of high and super high yield (12750 ~ 16000kg · hm-2) population pool and source and sink flow in spring maize population were studied. The experiment was carried out in Lishu County, Jilin Province. The planting density was 36,912,000 plants · hm-24 and 0,180,360,540 kg · hm-24 nitrogen treatments were conducted. The results showed that population size, grain weight per spike and 100-grain weight could reflect the population quantity and quality of the population. The grain-leaf ratio could reflect the quantitative relationship between population source and population pool. For high-yield and high- It is an effective way to further increase the yield of super-high-yielding population and increase the population size by simultaneously overcoming the restrictions of yield of the library and stream, and the key to increase the population size is to reduce the abortion. The grain-leaf ratio decreases as the density increases Increase the density to expand the library at the same time, should be appropriate to reduce the source of increase